Joe Eykholt [Sat, 13 Mar 2010 00:08:55 +0000 (16:08 -0800)]
[SCSI] libfc, libfcoe, fcoe: use smp_processor_id() only when preempt disabled
When the kernel is configured for preemption, using smp_processor_id()
when preemption is enabled causes a warning backtrace and is wrong
since we could move off of that CPU as soon as we get the ID,
and we would be referencing the wrong CPU, and possibly an invalid one
if it could be hotswapped out.
Remove the fc_lport_get_stats() function and explicitly use per_cpu_ptr()
to get the statistics. Where preemption has been disabled by holding
a _bh lock continue to use smp_processor_id(), but otherwise use
get_cpu()/put_cpu().
In fcoe_recv_frame() also changed the cases where we return in the
middle to do a goto to the code which bumps ErrorFrames and does
a put_cpu(). Two of these cases didn't bump ErrorFrames before, but
doing so is harmless because they "can't happen", due to prior length
checks.
Also rearranged code in fcoe_recv_frame() to have only one call to
fc_exch_recv(). It's just as efficient and saves a call to put_cpu().
In fc_fcp.c, adjusted a FIXME comment for code which doesn't need fixing.
Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Robert Love [Sat, 13 Mar 2010 00:08:50 +0000 (16:08 -0800)]
[SCSI] libfc: Add debug statements when fc_fcp returns DID_ERROR to scsi-ml
DID_ERROR cases can be ambigouos. Debugging FCP error cases
will be much easier if we have debug statements when we hit
these error conditions.
This patch simply adds debug messages using the FC_FCP_DBG
macro when we return DID_ERROR to SCSI. This way if a DID_ERROR
is reproducible turning on debug_logging will give a clue
to developers as to what the problem might be.
Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Vasu Dev [Sat, 13 Mar 2010 00:08:44 +0000 (16:08 -0800)]
[SCSI] libfc: fix fcp pkt recovery in fc_fcp_recv_data
Currently fc_fcp_recv_data calls fc_fcp_retry_cmd to
retry failed IO but in this case tgt is still sending
data frames, therefore exchange needs to be aborted
first before initiating retry. So this patch fixes
this by aborting exchange first then have retry.
Renames fc_timeout_error to fc_fcp_recovery since
fc_timeout_error is already called from several other
places beside from fcp timeout handler and then
used fc_fcp_recovery for abort & retry from
fc_fcp_recv_data, this rename also required renaming
FC_CMD_TIME_OUT status to FC_CMD_RECOVERY to be
consistent with new fc_fcp_recovery.
Data frames are not expected for an DDPed exchange and
potentially it could be tampered data frame, so does
recovery in this case by calling fc_fcp_recovery.
Signed-off-by: Vasu Dev <vasu.dev@intel.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Vasu Dev [Sat, 13 Mar 2010 00:08:39 +0000 (16:08 -0800)]
[SCSI] libfc: use offload EM instance again instead jumping to next EM
Since use of offloads is more efficient than switching
to non-offload EM. However kept logic same to call em_match
if it is provided in the list of EMs.
Converted fc_exch_alloc to inline being now tiny a function
and already not an exported libfc API any more.
Signed-off-by: Vasu Dev <vasu.dev@intel.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Vasu Dev [Sat, 13 Mar 2010 00:08:34 +0000 (16:08 -0800)]
[SCSI] libfc: fixes unnecessary seq id jump
In some cases seq is incremented twice causing unnecessary
seq jump, for instance fc_exch_recv_seq_resp increments
seq id when fc_sof_is_init is true and that is true for
each incoming xfer ready but then fc_fcp_send_data does
another seq increment to send data for xfer ready.
This patch removes all such seq id jumps, at least it
eliminates few calls to fc_seq_start_next using ex_lock.
Also removes seq id update with incoming frame's seq id
as this is not needed since each end (I or T) just need
to send incremented their own seq id on each TSI from
other end & before sending new sequence within a
exchange.
Signed-off-by: Vasu Dev <vasu.dev@intel.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Joe Eykholt [Sat, 13 Mar 2010 00:08:29 +0000 (16:08 -0800)]
[SCSI] libfc: fix sequence-initiative WARN in fc_seq_start_next
When starting a new response sequence in a multi-sequence
exchange, a warning was issued that sequence initiative
wasn't held.
The bug was that sequence initiative was cleared by the previous
sequence due to the END_SEQ flag being on. The intent may have
been to check LAST_SEQ. Change just to check SEQ_INIT.
Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Joe Eykholt [Sat, 13 Mar 2010 00:08:23 +0000 (16:08 -0800)]
[SCSI] libfcoe: eliminate unused link and last_link fields
The link and last_link fields in the fcoe_ctlr struct are no
longer useful, since they are always set to the same value,
and FIP always calls libfc to pass link information to the lport.
Eliminate those fields and rename link_work to timer_work, since
it no longer has any link change work to do.
Thanks to Brian Uchino for discovering this issue.
Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Joe Eykholt [Sat, 13 Mar 2010 00:08:18 +0000 (16:08 -0800)]
[SCSI] fcoe: remove an unused variable in fcoe_recv_frame()
Remove an unused variable, mac, in fcoe_recv_frame().
Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Joe Eykholt [Sat, 13 Mar 2010 00:08:12 +0000 (16:08 -0800)]
[SCSI] libfc: send point-to-poin FLOGI LS_ACC to assigned D_DID
The method we've been using for point-to-point mode requires
that the LS_ACC for the FLOGI uses the D_ID and S_ID assigned
to the remote port and local port, not those in the exchange.
This is not the correct method, but for now, it's what works
with the old target, as well as with new targets based on libfc.
This patch changes the addresses used accordingly.
Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Joe Eykholt [Sat, 13 Mar 2010 00:08:07 +0000 (16:08 -0800)]
[SCSI] libfc: recognize incoming FLOGI for point-to-point mode
When receiving a FLOGI request from a point-to-point peer,
the D_ID of 0xfffffe was not recognized as belonging to one
of the lports, so it was dropped.
Change fc_vport_id_lookup() to treat d_id 0xfffffe as a match.
Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Joe Eykholt [Sat, 13 Mar 2010 00:08:02 +0000 (16:08 -0800)]
[SCSI] fcoe: save gateway address when receiving FLOGI request
In point-to-point mode, we need to save the source MAC
from received FLOGI requests to use as the destination MAC
for all outgoing frames. We stopped doing that at some point.
Use the lport_set_port_id method to catch incoming FLOGI frames
and pass them to fcoe_ctlr_recv_flogi() so it can save the source MAC.
Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
The debug message that indicated we are using non-FIP mode was
being printed only if we were already in non-FIP mode.
Also changed the message text to make it more clear the mode
is being set, not that the message is indicating how FLOGI
was received.
Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Joe Eykholt [Sat, 13 Mar 2010 00:07:52 +0000 (16:07 -0800)]
[SCSI] fcoe: call fcoe_ctlr_els_send even for ELS responses
In point-to-point mode, the destination MAC address for
the FLOGI response was zero because the LS_ACC for the FLOGI
wasn't getting intercepted by FIP.
Change to call fcoe_ctlr_els_send when sending any ELS,
not just requests.
Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Joe Eykholt [Sat, 13 Mar 2010 00:07:46 +0000 (16:07 -0800)]
[SCSI] libfc: fix oops in point-to-point mode
In point-to-point mode, if the PLOGI to the remote port times
out, it can get deleted by the remote port module. Since there's
no reference by the local port, lport->ptp_data points to a freed
rport, and when the local port is reset and tries to logout again,
an oops occurs in mutex_lock_nested().
Hold a reference count on the point-to-point rdata.
Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Joe Eykholt [Sat, 13 Mar 2010 00:07:41 +0000 (16:07 -0800)]
[SCSI] libfc: add definition for task attribute mask
The FCP command header definition should define a mask for
the task attribute field. This adds that #define.
Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Joe Eykholt [Sat, 13 Mar 2010 00:07:36 +0000 (16:07 -0800)]
[SCSI] libfc: recode incoming PRLI handling
Reduce indentation in fc_rport_recv_prli_req() using gotos.
Also add payload length checks.
Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Richard A Lary [Fri, 12 Mar 2010 23:27:06 +0000 (15:27 -0800)]
[SCSI] mpt2sas: use correct pci_resource_flag for comparison
This patch replaces incorrect base address space flag with correct IO
resource flag. Also, performs check of memory resource to validate
resource before using.
Signed-off-by: Richard A Lary <rlary@linux.vnet.ibm.com> Acked-by: "Desai, Kashyap" <Kashyap.Desai@lsi.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Kashyap, Desai [Tue, 9 Mar 2010 12:04:13 +0000 (17:34 +0530)]
[SCSI] mpt2sas : Device removal algorithm in interrupt context only
external host not connecting after controller reboot: The
problem is : devices are not coming back after having the cable
disconnected then reconnected. The problem is because the
driver/firmware device removal handshake is failing. Due to this failure,
the controller firmware is not sending out device add events when the target
is reconnected. This is root caused to a race in the driver/firmware device
removal algorithm. There is duplicate code in both interrupt and user
context; where target reset is being issue from user context path while
sas_iounit_control(OP_REMOVE) is being sent from interrupt context. An
active target_reset will fail the OP_REMOVE. To fix this problem, the
duplicate code has been removed from user context path.
Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Kashyap, Desai [Tue, 9 Mar 2010 11:02:47 +0000 (16:32 +0530)]
[SCSI] mpt2sas: Upgrading version to 04.100.01.02
Upgraded version string.
Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com> Reviewed-by: Eric Moore <eric.moore@lsi.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
modified _scsih_sas_device_find_by_handle
so to handle the search on both list(device list and device_init_list)
Also, we moved the priority of the
search so the ioc->sas_device_list is done first. The
"sas_device_init_list" is only used during the 1st port enable, so its
unlikely there’s devices on it.
Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com> Reviewed-by: Eric Moore <eric.moore@lsi.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Kashyap, Desai [Tue, 9 Mar 2010 11:01:43 +0000 (16:31 +0530)]
[SCSI] mpt2sas: RESCAN Barrier work is added in case of HBA reset.
Add the cancel_pending_work flag from the fw_event_work structure, and then to
set the flag during host reset, check the flag later from work threads
context and if cancel_pending_work_flag is set ingore those events.
Now Rescan after host reset is changed.
Added special task MPT2SAS_RESCAN_AFTER_HOST_RESET. This task will be queued
at the time of HBA reset. this task is treated as barrier. All work after
MPT2SAS_RESCAN_AFTER_HOST_RESET will be treated as new work and will be
server by callback handle. If host_recovery is going on while running RESCAN
task, it will wait for shos_recovery_done completion which will be called
from HBA reset DONE context.
Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com> Reviewed-by: Eric Moore <eric.moore@lsi.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Hannes Reinecke [Tue, 9 Mar 2010 09:18:48 +0000 (10:18 +0100)]
[SCSI] scsi_transport_fc: Protect against overflow in dev_loss_tmo
The rport structure defines dev_loss_tmo as u32, which is
later multiplied with HZ to get the actual timeout value.
This might overflow for large dev_loss_tmo values. So we
should be better using u64 as intermediate variables here
to protect against overflow.
Signed-off-by: Hannes Reinecke <hare@suse.de> Acked-by: James Smart <james.smart@emulex.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
adam radford [Mon, 8 Mar 2010 20:37:46 +0000 (12:37 -0800)]
[SCSI] 3w-xxxx, 3w-9xxx: force 60 second timeout
This small patch forces 60 second timeouts for the older 3w-xxxx &
3w-9xxx drivers for systems that don't contain the udev rule for
setting scsi timeouts to 60 seconds.
Signed-off-by: Adam Radford <aradford@gmail.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Jiri Slaby [Tue, 16 Mar 2010 15:23:58 +0000 (16:23 +0100)]
[SCSI] lpfc: fix lock imbalances
Stanse found that two error paths in lpfc_bsg_rport_els_cmp and
lpfc_issue_ct_rsp_cmp omits to unlock phba->ct_ev_lock. It is
because they wrongly unlock phba->hbalock instead. Fix that.
Signed-off-by: Jiri Slaby <jslaby@suse.cz> Acked-by: James Smart <james.smart@emulex.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Dan Carpenter [Mon, 15 Mar 2010 08:26:56 +0000 (11:26 +0300)]
[SCSI] dpt_i2o: several use after free issues
adpt_i2o_delete_hba() calls kfree() so we have to save "pHba->next"
before calling it. Also inside adpt_i2o_delete_hba() itself, there
was another use after free bug which I fixed by moving the kfree()
down a line.
Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev
* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev:
libata: Fix accesses at LBA28 boundary (old bug, but nasty) (v2)
Mark Lord [Wed, 7 Apr 2010 17:52:08 +0000 (13:52 -0400)]
libata: Fix accesses at LBA28 boundary (old bug, but nasty) (v2)
Most drives from Seagate, Hitachi, and possibly other brands,
do not allow LBA28 access to sector number 0x0fffffff (2^28 - 1).
So instead use LBA48 for such accesses.
This bug could bite a lot of systems, especially when the user has
taken care to align partitions to 4KB boundaries. On misaligned systems,
it is less likely to be encountered, since a 4KB read would end at
0x10000000 rather than at 0x0fffffff.
Signed-off-by: Mark Lord <mlord@pobox.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide-2.6:
ide: Fix IDE taskfile with cfq scheduler
ide: Must hold queue lock when requeueing
ide: Requeue request after DMA timeout
Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6:
ACPI / PM: Move ACPI video resume to a PM notifier
ACPI: Reduce ACPI resource conflict message to KERN_WARNING, printk cleanup
ACPI: battery drivers should call power_supply_changed()
ACPI: battery: Fix CONFIG_ACPI_SYSFS_POWER=n
PNPACPI: truncate _CRS windows with _LEN > _MAX - _MIN + 1
ACPI: Don't send KEY_UNKNOWN for random video notifications
ACPI: NUMA: map pxms to low node ids
ACPI: use _HID when supplied by root-level devices
ACPI / ACPICA: Do not check reference counters in acpi_ev_enable_gpe()
ACPI: fixes a false alarm from lockdep
ACPI dock: support multiple ACPI dock devices
ACPI: EC: Allow multibyte access to EC
* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus:
hvc_console: Fix race between hvc_close and hvc_remove
virtio: disable multiport console support.
virtio: console makes incorrect assumption about virtio API
virtio: console: Fix early_put_chars usage
MAINTAINERS: Put the virtio-console entry in correct alphabetical order
Currently early_put_chars is not used by virtio_console because it can
only be used once a port has been found, at which point it's too late
because it is no longer needed. This patch should fix it.
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Kevin Hilman [Wed, 7 Apr 2010 18:52:46 +0000 (11:52 -0700)]
rwsem generic spinlock: use IRQ save/restore spinlocks
rwsems can be used with IRQs disabled, particularily in early boot
before IRQs are enabled. Currently the spin_unlock_irq() usage in the
slow-patch will unconditionally enable interrupts and cause problems
since interrupts are not yet initialized or enabled.
This patch uses save/restore versions of IRQ spinlocks in the slowpath
to ensure interrupts are not unintentionally disabled.
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Al Viro [Wed, 7 Apr 2010 23:06:07 +0000 (00:06 +0100)]
Have nfs ->d_revalidate() report errors properly
If nfs atomic open implementation ends up doing open request from
->d_revalidate() codepath and gets an error from server, return that error
to caller explicitly and don't bother with lookup_instantiate_filp() at all.
->d_revalidate() can return an error itself just fine...
See
http://bugzilla.kernel.org/show_bug.cgi?id=15674
http://marc.info/?l=linux-kernel&m=126988782722711&w=2
for original report.
Reported-by: Daniel J Blueman <daniel.blueman@gmail.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-tip:
x86: Fix double enable_IR_x2apic() call on SMP kernel on !SMP boards
x86: Increase CONFIG_NODES_SHIFT max to 10
ibft, x86: Change reserve_ibft_region() to find_ibft_region()
x86, hpet: Fix bug in RTC emulation
x86, hpet: Erratum workaround for read after write of HPET comparator
bootmem, x86: Fix 32bit numa system without RAM on node 0
nobootmem, x86: Fix 32bit numa system without RAM on node 0
x86: Handle overlapping mptables
x86: Make e820_remove_range to handle all covered case
x86-32, resume: do a global tlb flush in S4 resume
arch/arm/mach-davinci/include/mach/da8xx.h:104: warning: ‘struct platform_device’
declared inside parameter list
arch/arm/mach-davinci/include/mach/da8xx.h:104: warning: its scope is only this
definition or declaration, which is probably not what you want
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6:
ALSA: mixart: range checking proc file
ALSA: hda - Fix a wrong array range check in patch_realtek.c
ALSA: ASoC: move dma_data from snd_soc_dai to snd_soc_pcm_stream
ALSA: hda - Enable amplifiers on Acer Inspire 6530G
ASoC: Only do WM8994 bias off transition from standby
ASoC: Don't use DCS_DATAPATH_BUSY for WM hubs devices
ASoC: Don't do runtime wm_hubs DC servo updates if using offset correction
ASoC: Support second DC servo readback method for wm_hubs
ASoC: Avoid wraparound in wm_hubs DC servo correction
ALSA: echoaudio - Eliminate use after free
ALSA: i2c: cleanup: change parameter to pointer
ALSA: hda - Add MSI blacklist for Aopen MZ915-M
ASoC: OMAP: Fix capture pointer handling for OMAP1510 to work correctly with recent ALSA PCM code
ALSA: hda - Update document about MSI and interrupts
ALSA: hda: Fix 0 dB offset for Lenovo Thinkpad models using AD1981
ALSA: hda - Add missing printk argument in previous patch
ASoC: Fix passing platform_data to ac97 bus users and fix a leak
ALSA: hda - Fix ADC/MUX assignment of ALC269 codec
ALSA: hda - Fix invalid bit values passed to snd_hda_codec_amp_stereo()
ASoC: wm8994: playback => capture
David Howells [Tue, 6 Apr 2010 21:35:09 +0000 (14:35 -0700)]
fs-cache: order the debugfs stats correctly
Order the debugfs statistics correctly. The values displayed through a
seq_printf() statement should be in the same order as the names in the
format string.
In the 'Lookups' line, objects created ('crt=') and lookups timed out
('tmo=') have their values transposed.
Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Howells [Tue, 6 Apr 2010 21:35:09 +0000 (14:35 -0700)]
frv: fix kernel/user segment handling in NOMMU mode
In NOMMU mode, the FRV segment handling is broken because KERNEL_DS ==
USER_DS. This causes tests of the following sort:
/* don't pin down non-user-based iovecs */
if (segment_eq(get_fs(), KERNEL_DS))
return NULL;
to malfunction.
To fix this, make USER_DS the top of RAM instead of the top of the non-IO
address space, and make KERNEL_DS one more than the top of the non-IO
address space.
Also get rid of FRV's __addr_ok() as nothing uses it.
Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
On exit paths in mxc_rtc_probe() method some resources are not freed
correctly.
This patch fixes:
* unrequested memory region containing imx RTC registers
* iounmap() isn't called on exit_free_pdata branch
* clock get rate is called for freed clock source
* clock isn't disabled on exit_put_clk branch
To simplify the fix managed device resources are used.
[akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Vladimir Zapolskiy <vzapolskiy@gmail.com> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: Daniel Mack <daniel@caiaq.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Presently, memcg's FILE_MAPPED accounting has following race with
move_account (happens at rmdir()).
increment page->mapcount (rmap.c)
mem_cgroup_update_file_mapped() move_account()
lock_page_cgroup()
check page_mapped() if
page_mapped(page)>1 {
FILE_MAPPED -1 from old memcg
FILE_MAPPED +1 to old memcg
}
.....
overwrite pc->mem_cgroup
unlock_page_cgroup()
lock_page_cgroup()
FILE_MAPPED + 1 to pc->mem_cgroup
unlock_page_cgroup()
Then,
old memcg (-1 file mapped)
new memcg (+2 file mapped)
This happens because move_account see page_mapped() which is not guarded
by lock_page_cgroup(). This patch adds FILE_MAPPED flag to page_cgroup
and move account information based on it. Now, all checks are synchronous
with lock_page_cgroup().
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Reviewed-by: Balbir Singh <balbir@in.ibm.com> Reviewed-by: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Cc: Andrea Righi <arighi@develer.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
When we look into pagemap using page-types with option -p, the value of
pfn for hugepages looks wrong (see below.) This is because pte was
evaluated only once for one vma although it should be updated for each
hugepage. This patch fixes it.
One hugepage contains 1 head page and 511 tail pages in x86_64 and each
two lines represent each hugepage. Voffset and offset mean virtual
address and physical address in the page unit, respectively. The
different hugepages should not have the same offset value.
ratelimit: fix the return value when __ratelimit() fails to acquire the lock
The log of commit edaac8e3167501cda336231d00611bf59c164346 ("ratelimit:
Fix/allow use in atomic contexts"), indicates that we want to suppress the
callback when the trylock fails.
Signed-off-by: Yong Zhang <yong.zhang@windriver.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Andrew Morton [Tue, 6 Apr 2010 21:35:00 +0000 (14:35 -0700)]
vfs: rename block_fsync() to blkdev_fsync()
Requested by hch, for consistency now it is exported.
Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Anton Blanchard <anton@samba.org> Cc: Christoph Hellwig <hch@lst.de> Cc: Jan Kara <jack@suse.cz> Cc: Jeff Moyer <jmoyer@redhat.com> Cc: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
We now call through generic_file_aio_write -> generic_write_sync ->
vfs_fsync_range. vfs_fsync_range has:
if (!fop || !fop->fsync) {
ret = -EINVAL;
goto out;
}
But drivers/char/raw.c doesn't set an fsync method.
We have two options: fix it or remove the raw driver completely. I'm
happy to do either, the fact this has been broken for so long suggests it
is rarely used.
The patch below adds an fsync method to the raw driver. My knowledge of
the block layer is pretty sketchy so this could do with a once over.
If we instead decide to remove the raw driver, this patch might still be
useful as a backport to 2.6.33 and 2.6.32.
Signed-off-by: Anton Blanchard <anton@samba.org> Reviewed-by: Jan Kara <jack@suse.cz> Cc: Christoph Hellwig <hch@lst.de> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Jens Axboe <jens.axboe@oracle.com> Reviewed-by: Jeff Moyer <jmoyer@redhat.com> Tested-by: Jeff Moyer <jmoyer@redhat.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Since Valentin's email address @siemens.com is no longer valid, it's time
to change it to the one that actually works so that I don't have to
manually forward patches against mb862xx to him every time.
Signed-off-by: Alexander Shishkin <virtuoso@slind.org> Acked-by: Valentin Sitdikov <v.sitdikov@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Randy Dunlap [Tue, 6 Apr 2010 21:34:57 +0000 (14:34 -0700)]
mb862xxfb: fix acceleration module license
mb862xxfb_accel built as a separate module, but it does not have a
MODULE_LICENSE, so it taints the kernel. Add a MODULE_LICENSE to it (same
as mb862xxfb license).
Shaohua Li reported his tmpfs streaming I/O test can lead to make oom.
The test uses a 6G tmpfs in a system with 3G memory. In the tmpfs, there
are 6 copies of kernel source and the test does kbuild for each copy. His
investigation shows the test has a lot of rotated anon pages and quite few
file pages, so get_scan_ratio calculates percent[0] (i.e. scanning
percent for anon) to be zero. Actually the percent[0] shoule be a big
value, but our calculation round it to zero.
Although before commit 84b18490 ("vmscan: get_scan_ratio() cleanup") , we
have the same problem too. But the old logic can rescue percent[0]==0
case only when priority==0. It had hided the real issue. I didn't think
merely streaming io can makes percent[0]==0 && priority==0 situation. but
I was wrong.
So, definitely we have to fix such tmpfs streaming io issue. but anyway I
revert the regression commit at first.
Anton Blanchard [Tue, 6 Apr 2010 21:34:55 +0000 (14:34 -0700)]
devmem: handle class_create() failure
I hit this when we had a bug in IDR for a few days. Basically sysfs would
fail to create new inodes since it uses an IDR and therefore class_create
would fail.
While we are unlikely to see this fail we may as well handle it instead of
oopsing.
Signed-off-by: Anton Blanchard <anton@samba.org> Reviewed-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Prevents further "key xxx not in .data" bug-reports. Although some
attributes could probably be converted to static ones, this is left for
people having hardware to test.
Found by this semantic patch:
@ init @
type T;
identifier A;
@@
T {
...
struct device_attribute A;
...
};
@ main extends init @
expression E;
statement S;
identifier err;
T *name;
@@
... when != sysfs_attr_init(&name->A.attr);
(
+ sysfs_attr_init(&name->A.attr);
if (device_create_file(E, &name->A))
S
|
+ sysfs_attr_init(&name->A.attr);
err = device_create_file(E, &name->A);
)
While reviewing, I put the initialization to apropriate places.
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Greg KH <gregkh@suse.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: Mike Isely <isely@pobox.com> Cc: Mauro Carvalho Chehab <mchehab@infradead.org> Cc: Sujith Thomas <sujith.thomas@intel.com> Cc: Matthew Garrett <mjg@redhat.com> Cc: Len Brown <len.brown@intel.com> Cc: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Dan Carpenter [Tue, 6 Apr 2010 21:34:50 +0000 (14:34 -0700)]
mxser: spin_lock() => spin_lock_irq()
This should be spin_lock_irq() to match the spin_unlock_irq(). Originally
it was a lock_kernel() but we switched everything to spin_lock_irq() last
November.
[akpm@linux-foundation.org: fix the MOXA_ASPP_MON case too (per Jiri)] Signed-off-by: Dan Carpenter <error27@gmail.com> Cc: Jiri Slaby <jirislaby@gmail.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The reset of data lines when the card is removed from the cage results in
a failure.The failure is seen if the card is removed from the cage when TC
is pending after a CMD with data received CC.The reset logic leaves the
controller in a state where niether a TC is received nor DTO.
The rest code can be safely removed here since it is taken care in the IRQ
handler.
Signed-off-by: Madhusudhan Chikkature <madhu.cr@ti.com> Cc: Adrian Hunter <adrian.hunter@nokia.com> Cc: <linux-mmc@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Jan Beulich [Tue, 6 Apr 2010 21:34:44 +0000 (14:34 -0700)]
vesafb: use platform_driver_probe() instead of platform_driver_register()
Commit c2e13037e6794bd0d9de3f9ecabf5615f15c160b ("platform-drivers: move
probe to .devinit.text in drivers/video") introduced a huge amount of
section mismatch warnings in vesafb code. Rather than converting all of
the annotations, do the obvious and revert the __init -> __devinit change,
and use the recommended (in that patch) alternative to calling
platform_driver_register(): vesafb depends on information obtained from by
kernel at boot time, cannot be a module, and no post-boot devices can ever
show up.
Signed-off-by: Jan Beulich <jbeulich@novell.com> Cc: Greg KH <greg@kroah.com> Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Härdeman [Tue, 6 Apr 2010 21:34:43 +0000 (14:34 -0700)]
include/linux/kfifo.h: fix INIT_KFIFO()
DECLARE_KFIFO creates a union with a struct kfifo and a buffer array with
size [size + sizeof(struct kfifo)].
INIT_KFIFO then sets the buffer pointer in struct kfifo to point to the
beginning of the buffer array which means that the first call to kfifo_in
will overwrite members of the struct kfifo.
Signed-off-by: David Härdeman <david@hardeman.nu> Acked-by: Stefani Seibold <stefani@seibold.net> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Andrew Morton [Tue, 6 Apr 2010 21:34:41 +0000 (14:34 -0700)]
bitops: remove temporary for_each_bit()
Migration has been completed so remove this now. There's one straggler in
linux-next's drivers/mtd/sm_ftl.c. A patch has been sent.
Cc: Akinobu Mita <akinobu.mita@gmail.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
before any other tracing-related commands results in a kernel panic:
BUG: failure at arch/microblaze/kernel/ftrace.c:198/ftrace_update_ftrace_func()!
Recoding ftrace_update_ftrace_func() to use &ftrace_caller directly eliminates
the need to capture its address elsewhere (and thus rely on a particular call
sequence).
Signed-off-by: Steven J. Magnani <steve@digidescorp.com> Signed-off-by: Michal Simek <monstr@monstr.eu>
When ide taskfile access is being used (for example with hdparm --security
commands) and cfq scheduler is selected, the scheduler crashes on BUG in
cfq_put_request.
The reason is that the cfq scheduler is tracking counts of read and write
requests separately; the ide-taskfile subsystem allocates a read request and
then flips the flag to make it a write request. The counters in cfq will
mismatch.
This patch changes ide-taskfile to allocate the READ or WRITE request as
required and don't change the flag later.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
NODEMASK_ALLOC/FREE are mapped to kmalloc/free if NODES_SHIFT > 8.
Among its several users, drivers/base/node.c wasn't including slab.h
leading to build failure if NODES_SHIFT > 8. Include slab.h from
drivers/base/node.c.
This isn't an ideal solution but including slab.h directly from
nodemask.h is not an option because nodemask.h gets included
everywhere. For now, make it work by including slab.h from its users.
ACPI / PM: Move ACPI video resume to a PM notifier
There is a problem with the ACPI video resume routine that it's
executed before the GPU that may be accessed by it. To fix this
issue, move the ACPI video resume to a power management notifier,
so that's executed after resuming all devices, including the GPU.
Fixes https://bugzilla.kernel.org/show_bug.cgi?id=15096, which is
a listed regression from 2.6.31.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Tested-by: Rafał Miłecki <zajec5@gmail.com> Acked-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Len Brown <len.brown@intel.com>
Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
genirq: Force MSI irq handlers to run with interrupts disabled
* git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog:
[WATCHDOG] hpwdt - fix lower timeout limit
[WATCHDOG] iTCO_wdt: TCO Watchdog patch for additional Intel Cougar Point DeviceIDs
[WATCHDOG] doc: Fix use of WDIOC_SETOPTIONS ioctl.
[WATCHDOG] doc: watchdog simple example: don't fail on fsync()
[WATCHDOG] set max63xx driver as ARM only
[WATCHDOG] powerpc: pika_wdt ident cannot be const
Dan Carpenter [Tue, 6 Apr 2010 16:31:26 +0000 (19:31 +0300)]
ALSA: mixart: range checking proc file
The original code doesn't take into consideration that the value of
MIXART_BA0_SIZE - pos can be less than zero which would lead to a large
unsigned value for "count".
Also I moved the check that read size is a multiple of 4 bytes below
the code that adjusts "count".
According to Intel Software Devel Manual Volume 3B, the
Nehalem-EX PMU is just like regular Nehalem (except for the
uncore support, which is completely different).
Signed-off-by: Vince Weaver <vweaver1@eecs.utk.edu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Lin Ming <ming.m.lin@intel.com>
LKML-Reference: <alpine.DEB.2.00.1004060956580.1417@cl320.eecs.utk.edu> Signed-off-by: Ingo Molnar <mingo@elte.hu>
perf kmem: Fix breakage introduced by 5a0e3ad slab.h script
Commit 5a0e3ad ("include cleanup: Update gfp.h and slab.h
includes to prepare for breaking implicit slab.h inclusion
from percpu.h") added a '#include <linux/slab.h>' to
tools/perf/builtin-kmem.h because: that tool has lines like
this:
projects / linux-beck.git / log