Tony Battersby [Fri, 13 Feb 2015 17:10:58 +0000 (12:10 -0500)]
sg: fix EWOULDBLOCK errors with scsi-mq
With scsi-mq enabled, userspace programs can get unexpected EWOULDBLOCK
(a.k.a. EAGAIN) errors when submitting commands to the SCSI generic
driver. Fix by calling blk_get_request() with GFP_KERNEL instead of
GFP_ATOMIC.
Note: to avoid introducing a potential deadlock, this patch should be
applied after the patch titled "sg: fix unkillable I/O wait deadlock
with scsi-mq".
Cc: <stable@vger.kernel.org> # 3.17+ Signed-off-by: Tony Battersby <tonyb@cybernetics.com> Acked-by: Douglas Gilbert <dgilbert@interlog.com> Tested-by: Douglas Gilbert <dgilbert@interlog.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Tony Battersby [Fri, 13 Feb 2015 17:09:44 +0000 (12:09 -0500)]
sg: fix unkillable I/O wait deadlock with scsi-mq
When using the write()/read() interface for submitting commands, the
SCSI generic driver does not call blk_put_request() on a completed SCSI
command until userspace calls read() to get the command completion.
Since scsi-mq uses a fixed number of preallocated requests, this makes
it possible for userspace to exhaust the entire preallocated supply of
requests. For places in the kernel that call blk_get_request() with
GFP_KERNEL, this can cause the calling process to deadlock in a
permanent unkillable I/O wait in blk_get_request() -> ... -> bt_get().
For places in the kernel that call blk_get_request() with GFP_ATOMIC,
this can cause blk_get_request() always to return -EWOULDBLOCK. Note
that these problems happen only if scsi-mq is enabled. Prevent the
problems by calling blk_put_request() as soon as the SCSI command
completes instead of waiting for userspace to call read().
Cc: <stable@vger.kernel.org> # 3.17+ Signed-off-by: Tony Battersby <tonyb@cybernetics.com> Acked-by: Douglas Gilbert <dgilbert@interlog.com> Tested-by: Douglas Gilbert <dgilbert@interlog.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Tony Battersby [Wed, 11 Feb 2015 16:32:06 +0000 (11:32 -0500)]
sg: fix read() error reporting
Fix SCSI generic read() incorrectly returning success after detecting an
error.
Cc: <stable@vger.kernel.org> Signed-off-by: Tony Battersby <tonyb@cybernetics.com> Acked-by: Douglas Gilbert <dgilbert@interlog.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Ondrej Zary [Mon, 9 Feb 2015 12:38:21 +0000 (13:38 +0100)]
wd719x: add missing .module to wd719x_template
wd719x_template is missing the .module field, causing module refcount
not to work, allowing to rmmod the driver while in use (mounted filesystem),
causing an oops.
Set .module to THIS_MODULE to fix the problem.
Signed-off-by: Ondrej Zary <linux@rainbow-software.org> Cc: <stable@vger.kernel.org> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Don Brace [Fri, 6 Feb 2015 23:44:15 +0000 (17:44 -0600)]
hpsa: correct compiler warnings introduced by hpsa-add-local-workqueue patch
Correct compiler warning introduced by hpsa-add-local-workqueue patch 6636e7f455b33b957c5ee016daa6de46148026ab hpsa: Use local workqueues
instead of system workqueues
Suggested-by: Kees Cook <keescook@chromium.org> Reviewed-by: Scott Teel <scott.teel@pmcs.com> Reviewed-by: Webb Scales <webbnh@hp.com> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Robert Love [Wed, 28 May 2014 21:19:01 +0000 (14:19 -0700)]
fcoe: Transition maintainership to Vasu
Acked-by: Vasu Dev <vasu.dev@intel.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Hannes Reinecke [Mon, 2 Feb 2015 07:33:16 +0000 (08:33 +0100)]
am53c974: remove left-over debugging code
A shost_printk() statement was left over from debugging.
It can safely be removed; the same information is displayed
in the debugging message some lines further down.
Cc: Ondrej Zary <linux@rainbow-software.org> Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Christoph Hellwig <hch@lst.de>
Hannes Reinecke [Wed, 4 Feb 2015 07:11:34 +0000 (08:11 +0100)]
scsi_logging: return void for dev_printk() functions
dev_printk() is now a void function, so the related functions
scmd_printk() and sdev_prefix_printk() should be made void, too.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Hannes Reinecke <hare@suse.de> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Using seq_printf to print a simple string is a lot more expensive than
it needs to be, since seq_puts exists. Replace seq_printf with
seq_puts when possible.
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Reviewed-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Christoph Hellwig <hch@lst.de>
Using seq_printf to print a simple string is a lot more expensive than
it needs to be, since seq_puts exists. Replace seq_printf with
seq_puts when possible.
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Reviewed-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Christoph Hellwig <hch@lst.de>
Using seq_printf to print a simple string is a lot more expensive than
it needs to be, since seq_puts exists. Replace seq_printf with
seq_puts when possible.
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Reviewed-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Christoph Hellwig <hch@lst.de>
The macro SPRINTF doesn't save a lot of typing or make the code more
readable, and depending on a specific identifier (m) in the
surrounding scope is generally frowned upon. Nuke it.
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Reviewed-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Christoph Hellwig <hch@lst.de>
Bart Van Assche [Fri, 30 Jan 2015 15:22:38 +0000 (16:22 +0100)]
sg: remove an unused variable
The 'data_dir' variable is not used in sg_common_write(), hence
remove this variable.
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Acked-by: Douglas Gilbert <dgilbert@interlog.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Don Brace [Fri, 23 Jan 2015 22:45:17 +0000 (16:45 -0600)]
hpsa: Use local workqueues instead of system workqueues
Suggested-by: Tomas Henzl <thenzl@redhat.com> Reviewed-by: Webb Scales <webbnh@hp.com> Reviewed-by: Kevin Barnett <Kevin.Barnett@pmcs.com> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Robert Elliott [Fri, 23 Jan 2015 22:45:01 +0000 (16:45 -0600)]
hpsa: detect and report failures changing controller transport modes
Detect failues when attempting to change controller to use simple
or performant transport modes (mode change ack) rather than just
proceeding ahead after timeouts.
Return values are added to:
hpsa_put_ctlr_into_performant_mode
hpsa_wait_for_mode_change_ack
and all their callers check/propagate the result.
More consistency in printing errors and whether
dev_err is used.
Reviewed-by: Scott Teel <scott.teel@pmcs.com> Signed-off-by: Robert Elliott <elliott@hp.com> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Robert Elliott [Fri, 23 Jan 2015 22:44:56 +0000 (16:44 -0600)]
hpsa: shorten the wait for the CISS doorbell mode change ack
Shorten the wait for the CISS configuration table doorbell mode
change acknowledgment from 300-600 s to 20 s, which is the value
specified in the CISS specification that should be honored by
all controllers.
Wait using interruptible msleep() rather than uninterruptible
usleep_range(), which triggers rt_sched timeout errors if the
wait is long.
Reviewed-by: Scott Teel <scott.teel@pmcs.com> Signed-off-by: Robert Elliott <elliott@hp.com> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Webb Scales [Fri, 23 Jan 2015 22:44:50 +0000 (16:44 -0600)]
hpsa: refactor duplicated scan completion code into a new routine
Hoist the conditional out of do_not_scan_if_controller_locked_up() and
place it in the caller (this improves the code structure, making it
more consistent with other uses and enabling tail-call optimization);
rename the function to hpsa_scan_complete(), and use it at the end of
hpsa_scan_start() as well.
Reviewed-by: Scott Teel <scott.teel@pmcs.com> Signed-off-by: Webb Scales <webbnh@hp.com> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Webb Scales [Fri, 23 Jan 2015 22:44:45 +0000 (16:44 -0600)]
hpsa: move SG descriptor set-up out of hpsa_scatter_gather()
Move the code which sets up the SG descriptor out of hpsa_scatter_gather()
and into a subroutine where it can be reused (in the next patch). The Ext
field is now assigned unconditionally: this makes the refactor much simpler,
but more importantly it removes a conditional operation from inside the
loop. The case for which the conditional formerly tested is now executed
(unconditionally) after the loop is exited.
Reviewed-by: Scott Teel <scott.teel@pmcs.com> Signed-off-by: Webb Scales <webbnh@hp.com> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Don Brace [Fri, 23 Jan 2015 22:44:24 +0000 (16:44 -0600)]
hpsa: return failed from device reset/abort handlers
Returning failed from the device reset handler will get the device
kicked offline, which is fine if the controller is locked up anyhow.
Cannot abort a command from a failed controller.
Reviewed-by: Scott Teel <scott.teel@pmcs.com> Reviewed-by: Justin Lindley <justin.lindley@pmcs.com> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Stephen Cameron [Fri, 23 Jan 2015 22:44:19 +0000 (16:44 -0600)]
hpsa: check for ctlr lockup after command allocation in main io path
Command allocation is the thing that takes the longest in the main i/o
path, so check for controller lockup immediately after this to prevent
submitting commands to locked up controller as much as possible.
Reviewed-by: Scott Teel <scott.teel@pmcs.com> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Stephen Cameron [Fri, 23 Jan 2015 22:44:14 +0000 (16:44 -0600)]
hpsa: guard against overflowing raid map array
In the code that translates logical drive LBAs to physical
drive LBAs if we overflow the raid map disk data array we
will get the wrong answers. We do not expect that to happen,
but best to be on the safe side and guard against it anyway.
Reviewed-by: Scott Teel <scott.teel@pmcs.com> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Stephen Cameron [Fri, 23 Jan 2015 22:44:07 +0000 (16:44 -0600)]
hpsa: do not ack controller events on controllers that do not support it
Acking controller events on controllers that do not support
it can cause such controllers to lock up.
Reviewed-by: Scott Teel <scott.teel@pmcs.com> Signed-off-by: Joe Handzik <joseph.t.handzik@hp.com> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
/* Stop sending new RAID offload reqs via the IO accelerator */
scsi_block_requests(h->scsi_host);
for (i = 0; i < h->ndevices; i++)
h->dev[i]->offload_enabled = 0;
hpsa_drain_accel_commands(h);
So, we set offload_enabled = 0 for all drives, then do this
drain_accel_commands, so that means accel commands could still
be in flight, ie. perhaps having just been submitted into
hpsa_scsi_ioaccel_raid_map concurrent with ->offload_enabled
having just been set to zero.
Reviewed-by: Scott Teel <scott.teel@pmcs.com> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Stephen Cameron [Fri, 23 Jan 2015 22:43:56 +0000 (16:43 -0600)]
hpsa: do not check for msi(x) in interrupt_pending
No need to check whether interrupt pending for MSI(X) and
conversely, no need to check whether MSI(X) interrupts are
being used when checking if interrupts are pending.
Reviewed-by: Scott Teel <scott.teel@pmcs.com> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Robert Elliott [Fri, 23 Jan 2015 22:43:41 +0000 (16:43 -0600)]
hpsa: optimize cmd_alloc function by remembering last allocation
Empirically, this improves performance slightly (~2% max IOPS) by
allowing cmd_alloc to remember where it left off searching for
free commands between calls instead of always starting its search
at command 0.
Reviewed-by: Scott Teel <scott.teel@pmcs.com> Signed-off-by: Robert Elliott <elliott@hp.com> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Webb Scales [Fri, 23 Jan 2015 22:43:35 +0000 (16:43 -0600)]
hpsa: fix race between abort handler and main i/o path
This means changing the allocator to reference count commands.
The reference count is now the authoritative indicator of whether a
command is allocated or not. The h->cmd_pool_bits bitmap is now
only a heuristic hint to speed up the allocation process, it is no
longer the authoritative record of allocated commands.
Since we changed the command allocator to use reference counting
as the authoritative indicator of whether a command is allocated,
fail_all_outstanding_cmds needs to use the reference count not
h->cmd_pool_bits for this purpose.
Fix hpsa_drain_accel_commands to use the reference count as the
authoritative indicator of whether a command is allocated instead of
the h->cmd_pool_bits bitmap.
Reviewed-by: Scott Teel <scott.teel@pmcs.com> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Don Brace [Fri, 23 Jan 2015 22:43:30 +0000 (16:43 -0600)]
hpsa: honor queue depth of physical devices
When using the ioaccel submission methods, requests destined for RAID volumes
are sometimes diverted to physical devices. The OS has no or limited
knowledge of these physical devices, so it is up to the driver to avoid
pushing the device too hard. It is better to honor the physical device queue
limit rather than making the device spew zillions of TASK SET FULL responses.
This is so that hpsa based devices support /sys/block/sdNN/device/queue_type
of simple, which lets the SCSI midlayer automatically adjust the queue_depth
based on TASK SET FULL and GOOD status.
Adjust the queue depth for a new device after it is created based on the
maximum queue depths of the physical devices that constitute the
device. This drops the maximum queue depth from .can_queue of 1024 to
something like 174 for single-drive RAID-0, 348 for two-drive RAID-1, etc.
It also adjusts for the ratio of data to parity drives.
Reviewed-by: Scott Teel <scott.teel@pmcs.com> Signed-off-by: Webb Scales <webbnh@hp.com> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Don Brace [Fri, 23 Jan 2015 22:43:25 +0000 (16:43 -0600)]
hpsa: use workqueue to resubmit failed ioaccel commands
Instead of kicking the commands all the way back to the mid
layer, use a work queue. This enables having a mechanism for
the driver to be able to resubmit the commands down the "normal"
raid path without turning off the ioaccel feature entirely
whenever an error is encountered on the ioaccel path, and
prevent excessive rescanning of devices.
Reviewed-by: Scott Teel <scott.teel@pmcs.com> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Stephen Cameron [Fri, 23 Jan 2015 22:43:20 +0000 (16:43 -0600)]
hpsa: factor out hpsa_ciss_submit function
Factor out the bottom part of the queuecommand function
which is the part that builds commands for submitting down
the "normal' RAID stack path of a Smart Array.
Need to factor this out to improve how commands that
were initially sent down one of the "ioaccellerated"
paths but which have some sort of error condition are
retried down the "normal" path.
Reviewed-by: Scott Teel <scott.teel@pmcs.com> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Stephen Cameron [Fri, 23 Jan 2015 22:43:14 +0000 (16:43 -0600)]
hpsa: do not request device rescan on every ioaccel path error
The original reasoning behind doing this was faulty. An error
of some sort would be encountered, accelerated i/o would be
disabled for that logical drive, the command would be kicked
back out to the SCSI midlayer for a retry, and since i/o accelerator
mode was disabled, it would get retried down the RAID path.
However, something needs to turn ioaccellerator mode back on,
and this rescan request was what did that. However, it was racy,
and extremely bad for performance to rescan all devices, so,
don't do that.
Reviewed-by: Scott Teel <scott.teel@pmcs.com> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Don Brace [Fri, 23 Jan 2015 22:43:09 +0000 (16:43 -0600)]
hpsa: do not queue commands internally in driver
By not doing maintaining a list of queued commands, we can eliminate some spin
locking in the main i/o path and gain significant improvement in IOPS. Remove
the queuing code and the code that calls it; remove now-unused interrupt code;
remove DIRECT_LOOKUP_BIT.
Now that the passthru commands share the same command pool as
the main i/o path, and the total size of the pool is less than
or equal to the number of commands that will fit in the hardware
fifo, there is no need to check to see if we are exceeding the
hardware fifo's depth.
Reviewed-by: Scott Teel <scott.teel@pmcs.com> Reviewed-by: Robert Elliott <elliott@hp.com> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Stephen Cameron [Fri, 23 Jan 2015 22:42:59 +0000 (16:42 -0600)]
hpsa: reserve some commands for use by driver
We need to reserve some commands for device rescans,
aborts, and the pass through ioctls, etc. so we cannot
give them all to the scsi mid layer.
This is in preparation for removing cmd_special_alloc and
cmd_special_free so that we can stop queuing commands internally
in the driver so that we can remove the locks thta protect the
queue that we will no longer have.
Reviewed-by: Scott Teel <scott.teel@pmcs.com> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
This didn't cause any problem, as those functions can tolerate being called
when what they free hasn't been allocated (relevant pointers would be NULL)
but it is potentially confusing.
Reviewed-by: Scott Teel <scott.teel@pmcs.com> Signed-off-by: Robert Elliott <elliott@hp.com> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Scott Teel <scott.teel@pmcs.com> Signed-off-by: Robert Elliott <elliott@hp.com> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Robert Elliott [Fri, 23 Jan 2015 22:42:42 +0000 (16:42 -0600)]
hpsa: report allocation failures while allocating SG chain blocks
Reviewed-by: Scott Teel <scott.teel@pmcs.com> Signed-off-by: Robert Elliott <elliott@hp.com> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Robert Elliott [Fri, 23 Jan 2015 22:42:37 +0000 (16:42 -0600)]
hpsa: pass error from pci_set_consistent_dma_mask from hpsa_message
Return the actual error code instead of a generic error code.
Reviewed-by: Scott Teel <scott.teel@pmcs.com> Signed-off-by: Robert Elliott <elliott@hp.com> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Robert Elliott [Fri, 23 Jan 2015 22:42:32 +0000 (16:42 -0600)]
hpsa: rename hpsa_request_irq to hpsa_request_irqs
Make the function name more descriptive. We use more than
one interrupt.
Reviewed-by: Scott Teel <scott.teel@pmcs.com> Signed-off-by: Robert Elliott <elliott@hp.com> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Robert Elliott [Fri, 23 Jan 2015 22:42:27 +0000 (16:42 -0600)]
hpsa: report failure to ioremap config table
Enhance error reporting.
Reviewed-by: Scott Teel <scott.teel@pmcs.com> Signed-off-by: Robert Elliott <elliott@hp.com> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Stephen Cameron [Fri, 23 Jan 2015 22:42:22 +0000 (16:42 -0600)]
hpsa: trivial message and comment clean ups
Cleanup comments to be more specific. Make messages more
informational.
Reviewed-by: Scott Teel <scott.teel@pmcs.com> Signed-off-by: Robert Elliott <elliott@hp.com> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Webb Scales [Fri, 23 Jan 2015 22:42:17 +0000 (16:42 -0600)]
hpsa: refactor hpsa_find_board_params() to encapsulate legacy test
Encapsulate the conditional predicate which tests for legacy controllers
in a separate function and rework the code comments.
Reviewed-by: Scott Teel <scott.teel@pmcs.com> Signed-off-by: Webb Scales <webbnh@hp.com> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Robert Elliott [Fri, 23 Jan 2015 22:42:11 +0000 (16:42 -0600)]
hpsa: downgrade the Waiting for no-op print to dev_info
There is nothing worrisome about the "Waiting for controller to
respond to no-op" print, so use dev_info rather than dev_warn.
Reviewed-by: Scott Teel <scott.teel@pmcs.com> Signed-off-by: Robert Elliott <elliott@hp.com> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Robert Elliott [Fri, 23 Jan 2015 22:42:06 +0000 (16:42 -0600)]
hpsa: propagate return value from board ID lookup
If the board ID lookup function fails, return the return
code rather than return -ENODEV.
The only board ID failure reason right now is -ENODEV,
so this just provides more informative prints in kdump
and adapts to future changes.
Tested with error injection while booting with
reset_devices
on the kernel command line:
[ 62.804324] injecting error in inj_hpsa_lookup_board_id: 1 11
[ 62.804423] hpsa 0000:04:00.0: Board ID not found
(the pci probe layer does not print an additional
message if -ENODEV is the reason)
Reviewed-by: Scott Teel <scott.teel@pmcs.com> Signed-off-by: Robert Elliott <elliott@hp.com> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Robert Elliott [Fri, 23 Jan 2015 22:42:01 +0000 (16:42 -0600)]
hpsa: propagate hard_reset failures in reset_devices mode
Return the real reason for kdump_hard_reset failure rather
than change them all to -ENODEV.
Reviewed-by: Scott Teel <scott.teel@pmcs.com> Signed-off-by: Robert Elliott <elliott@hp.com> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Robert Elliott [Fri, 23 Jan 2015 22:41:56 +0000 (16:41 -0600)]
hpsa: remove 0x from queue depth print which is in decimal
The queue depth printed at startup is in decimal, so
shouldn't have a 0x prefix.
Reviewed-by: Scott Teel <scott.teel@pmcs.com> Signed-off-by: Robert Elliott <elliott@hp.com> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Robert Elliott [Fri, 23 Jan 2015 22:41:51 +0000 (16:41 -0600)]
hpsa: notice all request_irq errors
In MSI and MSI-X mode, where hpsa asks for more than one interrupt,
hpsa_request_irqs forgets if the first request_irq call failed
if later ones succeed.
It needs to exit the loop on any failure rather than continue,
freeing all irqs that were requested until that point.
Also, it needs to clear out the q numbers up to MAX_REPLY_QUEUES.
The same is true for the general hpsa_free_irqs function.
Tested with error injection of -ENOSYS on the 4th call:
[ 9.277691] injecting error in inj_request_irq: 1 4
[ 9.277780] hpsa 0000:02:00.0: failed to get irq 35 for hpsa1
[ 10.711623] scsi host1: Error handler scsi_eh_1 exiting
[ 10.739170] hpsa: probe of 0000:02:00.0 failed with error -38
Reviewed-by: Scott Teel <scott.teel@pmcs.com> Signed-off-by: Robert Elliott <elliott@hp.com> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Fabian Frederick [Fri, 23 Jan 2015 22:41:46 +0000 (16:41 -0600)]
hpsa: Fix -Wunused-but-set-variable warning
Remove unused variable in hpsa_free_cmd_pool.
Reviewed-by: Scott Teel <scott.teel@pmcs.com> Signed-off-by: Fabian Frederick <fabf@skynet.be> Acked-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Robert Elliott [Fri, 23 Jan 2015 22:41:40 +0000 (16:41 -0600)]
hpsa: rename free_irqs to hpsa_free_irqs
Change the function names to have hpsa prefix.
Reviewed-by: Scott Teel <scott.teel@pmcs.com> Signed-off-by: Robert Elliott <elliott@hp.com> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Robert Elliott [Fri, 23 Jan 2015 22:41:35 +0000 (16:41 -0600)]
hpsa: adjust RAID-1, RAID-1ADM, and RAID-6 names
HP now uses RAID-6 rather than RAID-ADG (Advanced Data Guarding)
as the marketing name for our implementation of RAID-6.
The driver considers RAID-1 and RAID-1+0 to be the same level, and
considers RAID-1ADM and RAID-1+0ADM to be the same level. Parenthesis
can be used to reflect the optional +0 portion of both those RAID levels.
Rename: RAID-ADG to RAID-6
RAID-1(1+0) to RAID-1(+0)
RAID-1(ADM) to RAID-1(+0)ADM
Also, add another const after the pointer type as suggested
by checkpatch.pl so the array is:
static const char * const raid_label[]
Reviewed-by: Scott Teel <scott.teel@pmcs.com> Signed-off-by: Robert Elliott <elliott@hp.com> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Don Brace [Fri, 23 Jan 2015 22:41:30 +0000 (16:41 -0600)]
hpsa: correct change_queue_depth
We change drive queue depths to match drive reported queue depths.
The name of the SML function was changed from scsi_adjust_queue_depth
changed to scsi_change_queue_depth.
Reviewed-by: Scott Teel <scott.teel@pmcs.com> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Don Brace [Fri, 23 Jan 2015 22:41:25 +0000 (16:41 -0600)]
hpsa: change how SA controllers are reset
Change how SA controllers are reset by changing PCI power levels.
The hpsa driver was finding the PCI_PM_CTRL_STATE_MASK offset
then reading/writing a bitmask to change the power state. There
are kernel functions that do the same operations. Better to use
the kernel functions.
Signed-off-by: Don Brace <don.brace@pmcs.com> Reviewed-by: Scott Teel <scott.teel@pmcs.com> Reviewed-by: Webb Scales <webbnh@hp.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Tomas Henzl [Fri, 23 Jan 2015 22:41:20 +0000 (16:41 -0600)]
hpsa: turn off interrupts when kdump starts
Sometimes when the card is restarted it may cause -
"irq 16: nobody cared (try booting with the "irqpoll" option)"
that is likely caused so, that the card, after the hard reset
finishes, pulls on the irq. Disabling the ints before or after
the hpsa_kdump_hard_reset_controller fixes it.
At this point we can't know in which state the card is,
so using SA5_INTR_OFF + SA5_REPLY_INTR_MASK_OFFSET defines directly,
instead of the function the drivers provides, seems to be apropriate.
Reviewed-by: Scott Teel <scott.teel@pmcs.com> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Tomas Henzl [Fri, 23 Jan 2015 22:41:14 +0000 (16:41 -0600)]
hpsa: fix memory leak in kdump hard reset
There is a potential memory leak in hpsa_kdump_hard_reset_controller.
Reviewed-by: Don Brace <don.brace@pmcs.com> Reviewed-by: Scott Teel <scott.teel@pmcs.com> Signed-off-by: Tomas Henzl <thenzl@redhat.com> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Don Brace [Fri, 23 Jan 2015 22:41:09 +0000 (16:41 -0600)]
hpsa: correct endian sparse warnings
Correct endiness issues reported by sparse. SA controllers are
little endian. This patch ensures endiness correctness.
Signed-off-by: Don Brace <don.brace@pmcs.com> Reviewed-by: Scott Teel <scott.teel@pmcs.com> Reviewed-by: Webb Scales <webbnh@hp.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Yaniv Gardi [Thu, 15 Jan 2015 14:32:37 +0000 (16:32 +0200)]
ufs-qcom: add support for Qualcomm Technologies Inc platforms
This change adds support for Qualcomm Technologies Inc platforms that
use UFS driver. for example, it adds :
- PM specific operations during hibern8, suspend, resume, clock setup
- qcom-ufs generic phy driver initialization, calibration,
power-on/off sequence, etc.
- UFS Controller specific configuration
- Rate, Gear, Mode negotiation between device and controller
Yaniv Gardi [Thu, 15 Jan 2015 14:32:35 +0000 (16:32 +0200)]
phy: qcom-ufs: add support for QUALCOMM Technologies UFS PHY drivers
This change adds a generic and common API support for ufs phy QUALCOMM
Technologies. This support provides common code and also points
to specific phy callbacks to differentiate between different behaviors
of frequent use-cases (like power on, power off, phy calibration etc).
The midlayer scsi logging already logs the command and sense code
if the logging level is high enough, no need to duplicate that
in the sr driver.
Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: James Bottomley <JBottomley@Parallels.com> Reviewed-by: Ewan D. Milne <emilne@redhat.com> Reviewed-by: Hannes Reinecke <hare@suse.de>
The midlayer logging already prints the cdb details if the logging
level is high enough, no need to duplicate this in the ch driver.
Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: James Bottomley <JBottomley@Parallels.com> Reviewed-by: Ewan D. Milne <emilne@redhat.com> Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: James Bottomley <JBottomley@Parallels.com> Reviewed-by: Ewan D. Milne <emilne@redhat.com> Reviewed-by: Hannes Reinecke <hare@suse.de>
scsi: annotate sdev_prefix_printk and scmd_printk as printf-like
Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: James Bottomley <JBottomley@Parallels.com> Reviewed-by: Ewan D. Milne <emilne@redhat.com> Reviewed-by: Hannes Reinecke <hare@suse.de>
Sreekanth Reddy [Mon, 12 Jan 2015 06:09:04 +0000 (11:39 +0530)]
mpt2sas: Bump driver version to 20.100.00.00
Bump mpt2sas driver version to 20.100.00.00.
Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@avagotech.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Sreekanth Reddy [Mon, 12 Jan 2015 06:09:03 +0000 (11:39 +0530)]
mpt2sas, mpt3sas: set cpu affinity for each MSIX vectors
Added a support to set cpu affinity mask for each MSIX vector enabled
by the HBA. So that, running the irqbalancer will balance interrupts among
the cpus.
Change_set:
1. Added affinity_hint varable of type cpumask_var_t in adapter_reply_queue
structure. And allocated a memory for this varable by calling
alloc_cpumask_var.
2. Call the API irq_set_affinity_hint for each MSIx vector to affiniate it
with calculated cpus at driver inilization time.
3. While freeing the MSIX vector, call this same API to release the cpu
affinity mask for each MSIx vector by providing the NULL value in
cpumask argument.
4. then call the free_cpumask_var API to free the memory allocated in step 2.
Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@avagotech.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Sreekanth Reddy [Mon, 12 Jan 2015 06:09:02 +0000 (11:39 +0530)]
mpt2sas, mpt3sas: Update attribution language to Avago
Copyright, Trademark & Confidentiality legal statements throughout the
source code changed from LSI to Avago.
Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@avagotech.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Sreekanth Reddy [Mon, 12 Jan 2015 06:09:01 +0000 (11:39 +0530)]
mpt2sas: map log_info value 0x0x32010081 to DID_RESET
For any SCSI command, if the driver receives IOC status =
SCSI_IOC_TERMINATED and log info = 0x32010081 then that command will be
completed with DID_RESET host status.
The definition of this log info value is "Virtual IO has failed and has
to be retried".
Firmware will provide this log info value with IOC Status
"SCSI_IOC_TERMINATED", whenever a drive (with is a part of a volume)
is pulled and pushed back within some minimal delay. With this log info
value, firmware informs the driver to retry the failed IO command
infinite times, so to provide some time for the firmware to discover
the reinserted drive successfully instated of just retrying failed
command for five times( doesn't giving enough time for firmware to
complete the drive discovery) and failing the IO permanently even
though drive came back successfully.
Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@avagotech.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Sreekanth Reddy [Mon, 12 Jan 2015 06:09:00 +0000 (11:39 +0530)]
mpt2sas, mpt3sas: fix upper bound for the module parameter max_sgl_entries
Change Set:
1. Extended the upper boundary restriction for the module parameter
max_sgl_entries. Earlier, the max_sgl_entries was capped at the
SCSI_MAX_SG_SEGMENTS kernel definition. With this change, the user
would be able to set the max_sgl_entries to any value which is
greater than SCSI_MAX_SG_SEGMENTS and less than the minimum of
SCSI_MAX_SG_CHAIN_SEGMENTS & hardware limit (Calculated using
IOCFacts's MaxChainDepth).
2. Added a print for the message log whenever the user sets the
max_sgl_entries to a value greater than SCSI_MAX_SG_SEGMENTS to
warn about the kernel definition overriding.
Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@avagotech.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Sreekanth Reddy [Mon, 12 Jan 2015 06:08:59 +0000 (11:38 +0530)]
mpt2sas: MPI2 Rev BB (2.00.20) specification and 2.00.35 header files
Change List in this MPI2 specification,
1. Added SSUTimeout field to MPI2_CONFIG_PAGE_BIOS_1,
and more defines for the BiosOptions field.
Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@avagotech.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Sreekanth Reddy [Mon, 12 Jan 2015 06:08:58 +0000 (11:38 +0530)]
mpt2sas: Bump driver version to 19.100.00.00
Bump driver version to 19.100.00.00.
Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@avagotech.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Sreekanth Reddy [Mon, 12 Jan 2015 06:08:57 +0000 (11:38 +0530)]
mpt2sas, mpt3sas: Fail the host reset initiated due to discovery related I/O timeouts at driver load time
When a flaky disk is there in a topology then during driver load,
discovery related I/O times out; which results in SCSI error recovery
initiating host reset and then the controller won't see any disk.
In this patch, The driver would return FAILED status to the host reset
initiated due to discovery related I/O timeout if ioc->is_driver_loading
is set. This flag would be set until we exit out of scsih_scan_finished().
i.e.
During device discovery if one of the disk is flaky
(which responds to some discovery commands and doesn't respond to some)
the driver wouldn't perform host reset for discovery related I/O timeout.
Instead it would return Failure for the host reset resulting in the
flaky disk getting removed by the SCSI Mid layer,
so other disks would be added correctly.
Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@avagotech.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Sreekanth Reddy [Mon, 12 Jan 2015 06:08:56 +0000 (11:38 +0530)]
mpt2sas, mpt3sas: log exceeded temperature thresholds
This patch will log a message when driver receives "Temperature Threshold
exceeded" event from any temperature sensor.
The message will look similar to like:
mpt3sas0: Temperature Threshold flags a b c d exceeded for Sensor: x !!!
mpt3sas0: Current Temp In Celsius: y
where a b c d are threshold flags 0 1 2 3
Change_set:
1. Get the number of sensor count of this IOC by reading IO Unit page 8 at
driver initialization time.
2. Also unmask the Temperature Threshold Event at driver initialization
time
3. Whenever a MPI2_EVENT_TEMP_THRESHOLD event is received from the
firmware, then print the sensor number, the maximum threshold number it
has exceed and the current temperature of this sensor.
Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@avagotech.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Sreekanth Reddy [Mon, 12 Jan 2015 06:08:55 +0000 (11:38 +0530)]
mpt2sas: MPI2 Rev AA (2.00.19) specifications
Below is the changeset from the MPI specification and 2.00.34 header
files:
1) Defined additional bits in the BiosOptions field of BIOS Page 1 to
allow for finer control of X86 BIOS and UEFI BSD.
2) For the Clean Tool, reserved bit 26 of the Flags field for product
specific use.
Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@avagotech.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sumit Saxena <sumit.saxena@avagotech.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
megaraid_sas: reserve commands for IOCTLs and internal DCMDs
1) For fusion adapters, limit reserved frames for non SCSI commands to 8
(3 for parallel IOCTLs + 5 for driver's internal DCMDs).
Earlier reserved commands for non SCSI IO frames was set to 32, so with
this implementation, increased per controller "can_queue".
Behavior of MFI controllers will remain unchanged.
2) Optimize the code related to per controller's 'can_queue' setting.
Signed-off-by: Sumit Saxena <sumit.saxena@avagotech.com> Signed-off-by: Chaitra Basappa <chaitra.basappa@avagotech.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
megaraid_sas: complete outstanding IOCTLs before killing adapter
Driver calls megasas_complete_cmd() to call wake_up() for each MFI frame
that was issued through the ioctl() interface prior to the kill adapter.
This ensures userspace ioctl() system calls issued just before a kill
adapter don't get stuck in wait state and IOCTLs are returned to
the application.
Cc: <stable@vger.kernel.org> Signed-off-by: Sumit Saxena <sumit.saxena@avagotech.com> Signed-off-by: Chaitra Basappa <chaitra.basappa@avagotech.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
megaraid_sas: disable interrupt_mask before enabling hardware interrupts
Update driver "mask_interrupts" before enable/disable hardware interrupt
in order to avoid missing interrupts because of "mask_interrupts" still
set to 1 and hardware interrupts are enabled.
Cc: <stable@vger.kernel.org> Signed-off-by: Sumit Saxena <sumit.saxena@avagotech.com> Signed-off-by: Chaitra Basappa <chaitra.basappa@avagotech.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
megaraid_sas: fix the problem of non-existing VD exposed to host
This patch will address the issue of SCSI device created at OS level for
non existing VD. ldTgtIdtoLd[] array has size 256 for Extended VD firmware
and 128 for legacy firmware. Accessing indices beyond array size (OS will
send TUR, INQUIRY.. commands upto device index 255), may return valid LD
value and that particular SCSI command will be SUCCESS and creating SCSI
device for non existing target(VD).
For legacy firmware (64 VD firmware), invalidates LD (by setting LD value
to 0xff) in LdTgtIdtoLd[] array for device index beyond 127, so that
invalid LD(0xff) value should be returned beyond device index beyond 127.
Cc: <stable@vger.kernel.org> Signed-off-by: Kashyap Desai <kashyap.desai@avagotech.com> Signed-off-by: Sumit Saxena <sumit.saxena@avagotech.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
This patch adds support for Secure Encrypting Drives (SED) in JBOD mode:
1) If the firmware supports SED JBOD, all non read/write commands to JBODs
will be sent via firmware path, and read/write commands to JBODs will
be sent via fastpath.
2) If the firmware does not support SED JBOD, driver will fall back to the
old design, i.e. send all JBOD I/O via fastpath.
Signed-off-by: Sumit Saxena <sumit.saxena@avagotech.com> Signed-off-by: Chaitra Basappa <chaitra.basappa@avagotech.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
megaraid_sas: endianness related bug fixes and code optimization
This patch addresses below issues:
1) Few endianness bug fixes.
2) Break the iteration after (MAX_LOGICAL_DRIVES_EXT - 1)),
instead of MAX_LOGICAL_DRIVES_EXT.
3) Optimization in MFI INIT frame before firing.
4) MFI IO frame should be 256bytes aligned. Code is optimized to reduce
the size of frame for fusion adapters and make the MFI frame size
calculation a bit transparent and readable.
Cc: <stable@vger.kernel.org> Signed-off-by: Kashyap Desai <kashyap.desai@avagotech.com> Signed-off-by: Sumit Saxena <sumit.saxena@avagotech.com> Signed-off-by: Chaitra Basappa <chaitra.basappa@avagotech.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Hannes Reinecke [Thu, 8 Jan 2015 06:43:50 +0000 (07:43 +0100)]
scsi: do not display kernel pointer in message logs
It is not good practice to display the kernel pointer in any message logs,
and it doesn't display any additional information. And as we know have
block-layer assigned tags we can use them to differentiate the messages.
So remove any pointer references from the displayed messages.
Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Christoph Hellwig <hch@lst.de>
Hannes Reinecke [Thu, 8 Jan 2015 06:43:49 +0000 (07:43 +0100)]
scsi: Do not display buffer pointers in scsi_log_send()
scsi_log_send() would display buffer pointer for higher logging levels.
This is not only of questionable value but also exposes kernel pointer to
userspace, which is discouraged in some setups. So drop this message
altogether.
Tested-by: Robert Elliott <elliott@hp.com> Reviewed-by: Robert Elliott <elliott@hp.com> Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Christoph Hellwig <hch@lst.de>
Hannes Reinecke [Thu, 8 Jan 2015 06:43:48 +0000 (07:43 +0100)]
scsi: Conditionally compile in constants.c
Instead of having constants.c littered with ifdef statements we should
be moving dummy functions into the header and condintionally compile in
constants.c if selected. And update the Kconfig description to reflect
the actual size difference.
Suggested-by: Christoph Hellwig <hch@infradead.org> Tested-by: Robert Elliott <elliott@hp.com> Reviewed-by: Robert Elliott <elliott@hp.com> Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Christoph Hellwig <hch@lst.de>
Hannes Reinecke [Thu, 8 Jan 2015 06:43:47 +0000 (07:43 +0100)]
scsi: use per-cpu buffer for formatting scsi_print_result()
Convert scsi_print_result() to use the per-cpu buffer for decoding the
command result and disposition.
Tested-by: Robert Elliott <elliott@hp.com> Reviewed-by: Robert Elliott <elliott@hp.com> Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Christoph Hellwig <hch@lst.de>
Hannes Reinecke [Thu, 8 Jan 2015 06:43:46 +0000 (07:43 +0100)]
scsi: use per-cpu buffer for formatting sense
Convert sense buffer logging to use the per-cpu buffer to avoid line
breakup.
Tested-by: Robert Elliott <elliott@hp.com> Reviewed-by: Robert Elliott <elliott@hp.com> Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Christoph Hellwig <hch@lst.de>
Hannes Reinecke [Thu, 8 Jan 2015 06:43:45 +0000 (07:43 +0100)]
libata: use __scsi_format_command()
libata already uses an internal buffer, so we should be using
__scsi_format_command() here.
Tested-by: Robert Elliott <elliott@hp.com> Reviewed-by: Robert Elliott <elliott@hp.com> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Christoph Hellwig <hch@lst.de>
Hannes Reinecke [Thu, 8 Jan 2015 06:43:44 +0000 (07:43 +0100)]
scsi: use external buffer for command logging
Use an external buffer for __scsi_print_command() and move command
logging over to use the per-cpu logging buffer. With that we can
guarantee the command always will always be formatted in one line.
So we can even print out a variable length command correctly across
several lines. Finally rename __scsi_print_command() to
__scsi_format_comment() to better reflect the functionality.
Tested-by: Robert Elliott <elliott@hp.com> Reviewed-by: Robert Elliott <elliott@hp.com> Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Christoph Hellwig <hch@lst.de>
Hannes Reinecke [Thu, 8 Jan 2015 06:43:43 +0000 (07:43 +0100)]
scsi: log request tag for scmd_printk()
The request tag provides a concise identification of a SCSI
command, so we should be printing that out for scmd_printk().
Suggested-by: Christoph Hellwig <hch@lst.de> Tested-by: Robert Elliott <elliott@hp.com> Reviewed-by: Robert Elliott <elliott@hp.com> Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Christoph Hellwig <hch@lst.de>
Hannes Reinecke [Thu, 8 Jan 2015 06:43:42 +0000 (07:43 +0100)]
scsi: Implement per-cpu logging buffer
Implement a per-cpu buffer for formatting messages to avoid line breaks
up under high load. This patch implements scmd_printk() and
sdev_prefix_printk() using the per-cpu buffer and makes sdev_printk() a
wrapper for sdev_prefix_printk().
Tested-by: Robert Elliott <elliott@hp.com> Reviewed-by: Robert Elliott <elliott@hp.com> Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Christoph Hellwig <hch@lst.de>
projects / linux-beck.git / log