John Garry [Wed, 3 Feb 2016 18:26:10 +0000 (02:26 +0800)]
hisi_sas: update driver version to 1.2
Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
John Garry [Wed, 3 Feb 2016 18:26:09 +0000 (02:26 +0800)]
hisi_sas: add v1 hw ACPI support
Add support in v1 hw driver for ACPI.
A check on whether an ACPI handle is available for the device is used to
decide on whether to use ACPI reset handler or syscon for hw reset.
Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
John Garry [Wed, 3 Feb 2016 18:26:08 +0000 (02:26 +0800)]
hisi_sas: use Unified Device Properties API
The hisi_sas driver is required to support both device tree and
ACPI. The scanning of the device properties now uses the Unified Device
Properties API, which serves both OF and ACPI.
Since syscon is not supported by ACPI, syscon is only used in the driver
when device tree is used.
Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
With kernel change to split session lock in frwd_lock and back_lock for
tx and rx path correspondingly, in the IO path, common resource used in
driver such as WRB was left unprotected.
Add wrb_lock spinlock to protect allocation and freeing of WRB.
Signed-off-by: Jitendra Bhivare <jitendra.bhivare@broadcom.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Processing of mgmt and IO tasks are done in process context and
softirqs.
Allocation and freeing of sgl_handles needs to be done under
spin_lock_bh/spin_unlock_bh and move the locks to the routines.
Signed-off-by: Jitendra Bhivare <jitendra.bhivare@broadcom.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Connection resets observed from some targets when NOP-Out with wrong
ExpStatSn is sent.
FW keeps track of StatSn and fills up ExpStatSn accordingly. The header
filled up by the stack needs to be modified by driver to clear
ExpStatSn. If the field is not cleared, FW recalculates ExpStatSn and
wrong offset'ed ExpStatSn is seen in the wire trace.
Signed-off-by: Jitendra Bhivare <jitendra.bhivare@broadcom.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
WARN_ON(atomic_read(&mccq->used) >= mccq->len) seen when FW gets into
UE.
MCCQ overflow is happening because driver discards any new request and
frees up the tag. The tag allocation controls the number of MCC WRB
posted. It is being replenished but WRBs are not hence the WARN_ON.
Allocation and freeing of WRB and tags for MCC is now done in one place.
This helps to achieve proper accounting of WRB indices and MCC tags.
Signed-off-by: Jitendra Bhivare <jitendra.bhivare@broadcom.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
In open with IP of unknown address family, only tag is freed and error
returned. MCC WRB allocated for the operation is not freed.
Added check for supported family of IP in the beginning before
allocating the tag and WRB.
Signed-off-by: Jitendra Bhivare <jitendra.bhivare@broadcom.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Remove confusingly named be_mcc_compl_is_new and be_mcc_compl_use
functions in processing of BMBX. Rearrange beiscsi_process_mbox_compl
function.
Signed-off-by: Jitendra Bhivare <jitendra.bhivare@broadcom.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
be_mcc_compl_poll waits till 'used' count of MCC WRBQ is zero. This is
to determine the completion of an MCC sent.
Change function to poll for the tag of MCC sent, instead, and wait till
its tag_state is cleared.
Signed-off-by: Jitendra Bhivare <jitendra.bhivare@broadcom.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
be_mbox_notify_wait does exactly same thing as be_mbox_notify.
Signed-off-by: Jitendra Bhivare <jitendra.bhivare@broadcom.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jitendra Bhivare <jitendra.bhivare@broadcom.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
be_mcc_compl_process_isr is removed. MCC CQ processing is done only in
beiscsi_process_mcc_cq and MCC CQE processing is done only in
beiscsi_process_mcc_compl.
Signed-off-by: Jitendra Bhivare <jitendra.bhivare@broadcom.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Rename mcc_numtag to mcc_tag_status. MCC CQE status is processed using
macros already defined in be_cmds.h.
Add MCC_Q_WRB_ and MCC_Q_CMD_TAG_MASK macros to map to already defined
CQE_STATUS_ macros to be consistent when posting MCC.
Signed-off-by: Jitendra Bhivare <jitendra.bhivare@broadcom.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
mcc_cq_lock spin_lock is used only in beiscsi_process_mcc which is
called only when all interrupts are disabled from mgmt_epfw_cleanup
during unloading of driver. There is no other context where there can be
contention for the processing of CQ.
Signed-off-by: Jitendra Bhivare <jitendra.bhivare@broadcom.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Dan Carpenter [Sat, 30 Jan 2016 14:36:03 +0000 (17:36 +0300)]
bfa: use strncpy() instead of memcpy()
BFA_MFG_NAME is "QLogic" which is only 7 bytes, but we are copying 8
bytes. It's harmless because the badding byte is likely zero but it
makes static checkers complain.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Anil Gurumurthy <anil.gurumurthy@qlogic.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Raghava Aditya Renukunta <raghavaaditya.renukunta@pmcs.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
During EEH PCI hotplug activity kernel unloads and loads the driver,
causing character device to be unregistered(aac_remove_one).When the
driver is loaded back using aac_probe_one the character device needs
to be registered again for the AIF management tools to work.
Fixed by adding code to register character device in aac_probe_one if
it is unregistered in aac_remove_one.
Signed-off-by: Raghava Aditya Renukunta <raghavaaditya.renukunta@pmcs.com> Reviewed-by: Shane Seymour <shane.seymour@hpe.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
while driver removal is in progress or PCI shutdown is invoked, driver
kills AIF aacraid thread, but IOCTL requests from the management tools
re-start AIF thread leading to IOP_RESET.
Fixed by setting adapter_shutdown flag when PCI shutdown is invoked.
Signed-off-by: Raghava Aditya Renukunta <raghavaaditya.renukunta@pmcs.com> Reviewed-by: Shane Seymour <shane.seymour@hpe.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by: Tomas Henzl <thenzl@redhat.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
aac_mutex was used to create protect the ioctl path for only the compat
path, it would be make more sense to place mutex in aac_do_ioctl, which
is the main ioctl function call that handles all ioctl commands.
Created new mutex ioctl_mutex in struct aac_dev to protect switch case
in aac_do_ioctl and removed aac_mutex from aac_cfg_ioctl and
aac_compat_do_ioctl
Signed-off-by: Raghava Aditya Renukunta <RaghavaAditya.Renukunta@pmcs.com> Reviewed-by: Tomas Henzl <thenzl@redhat.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Series 7 does not support PCI hot reset used by EEH.
Enabled fundamental reset only for Series 7
Signed-off-by: Raghava Aditya Renukunta <raghavaaditya.renukunta@pmcs.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by: Tomas Henzl <thenzl@redhat.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
During EEH recovery number of online CPU's might change thereby changing
the number of MSIx vectors. Since each fib is allocated to a vector,
changes in the number of vectors causes fib to be sent thru invalid
vectors.In addition the correct number of MSIx vectors is not updated in
the INIT struct sent to the controller, when it is reinitialized.
Fixed by reassigning vectors to fibs based on the updated number of MSIx
vectors and updating the INIT structure before sending to controller.
Fixes: MSI-X vector calculation for suspend/resume Cc: stable@vger.kernel.org Signed-off-by: Raghava Aditya Renukunta <raghavaaditya.renukunta@pmcs.com> Reviewed-by: Shane Seymour <shane.seymour@hpe.com> Reviewed-by: Johannes Thumshirn <jthushirn@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
aac_fib_map_free() calls pci_free_consistent() without checking that
dev->hw_fib_va is not NULL and dev->max_fib_size is not zero.If they are
indeed NULL/0, this will result in a hang as pci_free_consistent() will
attempt to invalidate cache for the entire 64-bit address space
(which would take a very long time).
Fixed by adding a check to make sure that dev->hw_fib_va and
dev->max_fib_size are not NULL and 0 respectively.
Fixes: 9ad5204d6 - "[SCSI]aacraid: incorrect dma mapping mask during blinked recover or user initiated reset" Cc: stable@vger.kernel.org Signed-off-by: Raghava Aditya Renukunta <raghavaaditya.renukunta@pmcs.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by: Tomas Henzl <thenzl@redhat.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Added support for PCI EEH (extended error handling).
Signed-off-by: Raghava Aditya Renukunta <raghavaaditya.renukunta@pmcs.com> Reviewed-by: Tomas Henzl <thenzl@redhat.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
The driver utilizes an array of atomic variables to keep track of IO
submissions to each vector. To submit an IO multiple threads iterate
through the array to find a vector which has empty slots to send an
IO. The reading and updating of the variable is not atomic, causing race
conditions when a thread uses a full vector to submit an IO.
Fixed by mapping each FIB to a vector, the submission path then uses
said vector to submit IO thereby removing the possibly of a race
condition.The vector assignment is started from 1 since vector 0 is
reserved for the use of AIF management FIBS.If the number of MSIx
vectors is 1 (MSI or INTx mode) then all the fibs are allocated to
vector 0.
Fixes: 495c0217 "aacraid: MSI-x support" Cc: stable@vger.kernel.org # v4.1 Signed-off-by: Raghava Aditya Renukunta <raghavaaditya.renukunta@pmcs.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by: Tomas Henzl <thenzl@redhat.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
The method to allocate and free FIB's in the present code utilizes
spinlocks. Multiple IO's have to wait on the spinlock to acquire or free
fibs creating a performance bottleneck.
An alternative solution would be to use block layer tags to keep track
of the fibs allocated and freed. To this end aac_fib_alloc_tag was
created to utilize the blk layer tags to plug into the Fib pool.These
functions are used exclusively in the IO path. 8 fibs are reserved for
the use of AIF management software and utilize the previous spinlock
based implementations.
Signed-off-by: Raghava Aditya Renukunta <RaghavaAditya.Renukunta@pmcs.com> Reviewed-by: Shane Seymour <shane.seymour@hpe.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by: Tomas Henzl <thenzl@redhat.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
John Garry [Mon, 25 Jan 2016 18:47:23 +0000 (02:47 +0800)]
hisi_sas: update driver version to 1.1
Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
John Garry [Mon, 25 Jan 2016 18:47:22 +0000 (02:47 +0800)]
hisi_sas: add v2 tmf functions
Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
John Garry [Mon, 25 Jan 2016 18:47:21 +0000 (02:47 +0800)]
hisi_sas: add v2 slot error handler
Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
John Garry [Mon, 25 Jan 2016 18:47:20 +0000 (02:47 +0800)]
hisi_sas: add v2 path to send ATA command
Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
John Garry [Mon, 25 Jan 2016 18:47:19 +0000 (02:47 +0800)]
hisi_sas: add v2 code for itct setup and free
Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
John Garry [Mon, 25 Jan 2016 18:47:18 +0000 (02:47 +0800)]
hisi_sas: add v2 code to send smp command
Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
John Garry [Mon, 25 Jan 2016 18:47:17 +0000 (02:47 +0800)]
hisi_sas: add v2 path to send ssp frame
Include code to prep ssp frame and deliver to hardware.
Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
John Garry [Mon, 25 Jan 2016 18:47:16 +0000 (02:47 +0800)]
hisi_sas: add v2 cq interrupt handler
Also include slot_complete_v2_hw handler
Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
John Garry [Mon, 25 Jan 2016 18:47:15 +0000 (02:47 +0800)]
hisi_sas: add v2 SATA interrupt handler
Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
John Garry [Mon, 25 Jan 2016 18:47:14 +0000 (02:47 +0800)]
hisi_sas: add v2 channel interrupt handler
This also includes broadcast handler. Unlike v1 hw, broadcast does not
have its own dedicated interrupt.
Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
John Garry [Mon, 25 Jan 2016 18:47:13 +0000 (02:47 +0800)]
hisi_sas: add v2 phy down handler
Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
John Garry [Mon, 25 Jan 2016 18:47:12 +0000 (02:47 +0800)]
hisi_sas: add v2 int init and phy up handler
Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
John Garry [Mon, 25 Jan 2016 18:47:11 +0000 (02:47 +0800)]
hisi_sas: add v2 phy init code
Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
John Garry [Mon, 25 Jan 2016 18:47:10 +0000 (02:47 +0800)]
hisi_sas: add init_id_frame_v2_hw()
Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
John Garry [Mon, 25 Jan 2016 18:47:09 +0000 (02:47 +0800)]
hisi_sas: add v2 hw init
Add code to initialise the hardware.
Support is also added to deal with the "am-max-transmissions" (amt)
limitation in hip06 controller #1. This is how many connection requests
we can send on the system bus before waiting for a response. Due to
chip bus design, controller #1 is limited to 32 amt, while, by design, a
controller supports 64. The default value for the nibbles in the
relevant registers is 0x40; these need to be programmed with 0x20.
Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
John Garry [Mon, 25 Jan 2016 18:47:08 +0000 (02:47 +0800)]
hisi_sas: add v2 register definitions
Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
John Garry [Mon, 25 Jan 2016 18:47:07 +0000 (02:47 +0800)]
hisi_sas: add bare v2 hw driver
Just add enough to build and init the module.
Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
John Garry [Mon, 25 Jan 2016 18:47:06 +0000 (02:47 +0800)]
hisi_sas: rename some fields in hisi_sas_itct
Since hisi_sas_itct format is different between v1 and v2 hw, give more
general names for some fields.
Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
John Garry [Mon, 25 Jan 2016 18:47:05 +0000 (02:47 +0800)]
hisi_sas: add hisi_sas_err_record_v1
Since the error record structure is different for v2 hw, make
hisi_sas_err_record opaque and add hisi_sas_err_record_v1.
Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
John Garry [Mon, 25 Jan 2016 18:47:04 +0000 (02:47 +0800)]
hisi_sas: reduce max itct entries
Since v2 hw only supports 2048 itct entries, as opposed to 4096 for v1
hw, set the max itct entries to the lower of the two.
It is not anticipated that any device with v1 will ever require to
connect > 2048 devices.
Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
John Garry [Mon, 25 Jan 2016 18:47:03 +0000 (02:47 +0800)]
hisi_sas: set max commands as configurable
Since v2 hardware permits different numbers of commands to v1, set this
as configurable in hisi_sas_hw.
Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
John Garry [Mon, 25 Jan 2016 18:47:02 +0000 (02:47 +0800)]
hisi_sas: relocate DEV_IS_EXPANDER
Relocate DEV_IS_EXPANDER to hisi_sas.h as it will be required for v2 hw
support.
Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Add the dt bindings for HiSi SAS controller v2 HW.
The main difference in the controller from dt perspective is
interrupts. The v2 controller does not have dedicated fatal and
broadcast interrupts - they are multiplexed on the channel interrupt.
Each SAS v2 controller can issue upto 64 commands (or connection
requests) on the system bus without waiting for a response - this is
know as am-max-transmissions. In hip06, sas controller #1 has a
limitation that it has to limit am-max-transmissions to 32 - this
limitation is due to chip system bus design. It is not anticipated that
any future chip incorporating v2 controller will have such a limitation.
Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Jose Castillo [Fri, 29 Jan 2016 14:39:26 +0000 (14:39 +0000)]
bnx2fc: Show information about log levels in 'modinfo'
This patch adds the information of the different values that can be used
in the module parameter 'debug_logging', as it is shown below:
$ modinfo bnx2fc
[...]
parm: debug_logging:Option to enable extended logging,
Default is 0 - no logging.
0x01 - SCSI cmd error, cleanup.
0x02 - Session setup, cleanup, etc.
0x04 - lport events, link, mtu, etc.
0x08 - ELS logs.
0x10 - fcoe L2 fame related logs.
0xff - LOG all messages. (int)
Signed-off-by: Jose Castillo <jcastillo@redhat.com> Acked-by: Chad Dupuis <chad.dupuis@qlogic.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Lee Duncan [Wed, 20 Jan 2016 19:48:00 +0000 (11:48 -0800)]
scsi: Use ida for host number management
Update the SCSI hosts module to use ida to manage its host_no index
instead of an atomic integer. This means that the SCSI host number will
now be reclaimable.
Use the ida "simple" mechanism, since there should be no need for a
separate spin lock current usage. Ida was chosen over idr because the
hosts module already has its own instance and locking mechanisms that
aren't easily changed.
Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Lee Duncan <lduncan@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Sumit Saxena [Thu, 28 Jan 2016 15:34:31 +0000 (21:04 +0530)]
megaraid_sas: IO throttling support
This patch will add capability in driver to tell firmware that it can
throttle IOs in case controller's queue depth is downgraded post OFU
(online firmware upgrade). This feature will ensure firmware can be
downgraded from higher queue depth to lower queue depth without needing
system reboot. Added throttling code in IO path of driver, in case OS
tries to send more IOs than post OFU firmware's queue depth.
Signed-off-by: Sumit Saxena <sumit.saxena@avagotech.com> Signed-off-by: Kashyap Desai <kashyap.desai@avagotech.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Controller-wide queue depth will be greater among the two. Using this
new feature, iMR can provide larger Queue depth(QD) for JBOD and limited
QD for Virtual Disk(VD).
2. megaraid_sas driver will throttle read/write LDIOs based on "LDIO
Queue Depth".
3. Dual queue depth can be enabled/disabled via module parameter. It is
enabled by default if the firmware supports it. Only specific firmware
builds will enable the feature.
4. Added sysfs parameter "ldio_outstanding" which permits querying the
number of outstanding LDIO requests at runtime.
Signed-off-by: Sumit Saxena <sumit.saxena@avagotech.com> Signed-off-by: Kashyap Desai <kashyap.desai@avagotech.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
build_and_issue_cmd should return SCSI_MLQUEUE_HOST_BUSY for a few error
cases instead of returning 1.
Signed-off-by: Sumit Saxena <sumit.saxena@avagotech.com> Reviewed-by: Tomas Henzl <thenzl@redhat.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Sumit Saxena [Thu, 28 Jan 2016 15:34:28 +0000 (21:04 +0530)]
megaraid_sas: Reply Descriptor Post Queue (RDPQ) support
This patch will create a reply queue pool for each MSI-X index and will
provide an array of base addresses instead of the single address of
legacy mode. Using this new interface the driver can support higher
queue depths through scattered DMA pools.
If array mode is not supported driver will fall back to the legacy
method of reply pool allocation. This limits controller queue depth to
1K max. To enable a queue depth of more than 1K driver requires firmware
to support array mode and scratch_pad3 will provide the new queue depth
value.
When RDPQ is used, downgrading to an older firmware release should not
be permitted. This may cause firmware fault and is not supported.
Signed-off-by: Kashyap Desai <kashyap.desai@avagotech.com> Signed-off-by: Sumit Saxena <sumit.saxena@avagotech.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Sumit Saxena [Thu, 28 Jan 2016 15:34:27 +0000 (21:04 +0530)]
megaraid_sas: Fastpath region lock bypass
Firmware will fill out per-LD data to tell driver whether a particular
LD supports region lock bypass. If yes, then driver will send non-FP
LDIO to region lock bypass FIFO. With this change in driver, firmware
will optimize certain code to improve performance.
Signed-off-by: Kashyap Desai <kashyap.desai@avagotech.com> Signed-off-by: Sumit Saxena <sumit.saxena@avagotech.com> Reviewed-by: Tomas Henzl <thenzl@redhat.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Sumit Saxena [Thu, 28 Jan 2016 15:34:26 +0000 (21:04 +0530)]
megaraid_sas: Update device queue depth based on interface type
This patch will update device Queue depth based on interface type(SAS,
SATA..) for sysPDs. For Virtual disks(VDs), there will be no change in
queue depth (will remain 256). To fetch interface type (SAS or SATA or
FC..) of syspD, driver will send DCMD MR_DCMD_PD_GET_INFO.
Signed-off-by: Sumit Saxena <sumit.saxena@avagotech.com> Signed-off-by: Kashyap Desai <kashyap.desai@avagotech.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Sumit Saxena [Thu, 28 Jan 2016 15:34:25 +0000 (21:04 +0530)]
megaraid_sas: Task management support
This patch adds task management for SCSI commands. Added functions are
task abort and target reset.
1. Currently, megaraid_sas driver performs controller reset when any IO
times out. With task management support added, task abort and target
reset will be tried to recover timed out IO. If task management fails,
then controller reset will be performaned. If the task management
request times out, fail the request and escalate to the next
level (controller reset).
2. mr_device_priv_data will be allocated for all generations of
controller, but is_tm_capable flag will never be set for
controllers (prior to Invader series) as firmware support is not
available for task management.
3. Task management capable firmware will set is_tm_capable flag in
firmware API.
Signed-off-by: Sumit Saxena <sumit.saxena@avagotech.com> Signed-off-by: Kashyap Desai <kashyap.desai@avagotech.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Sumit Saxena [Thu, 28 Jan 2016 15:34:24 +0000 (21:04 +0530)]
megaraid_sas: Syncing request flags macro names with firmware
Signed-off-by: Sumit Saxena <sumit.saxena@avagotech.com> Reviewed-by: Tomas Henzl <thenzl@redhat.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Sumit Saxena [Thu, 28 Jan 2016 15:34:23 +0000 (21:04 +0530)]
megaraid_sas: MFI IO timeout handling
This patch will do proper error handling for DCMD timeout failure cases
for Fusion adapters:
1. For MFI adapters, in case of DCMD timeout (DCMD which must return
SUCCESS) driver will call kill adapter.
2. What action needs to be taken in case of DCMD timeout is decided by
function dcmd_timeout_ocr_possible(). DCMD timeout causing OCR is
applicable to the following commands:
3. If DCMD fails from driver init path there are certain DCMDs which
must return SUCCESS. If those DCMDs fail, driver bails out. For optional
DCMDs like pd_info etc., driver continues without executing certain
functionality.
Signed-off-by: Sumit Saxena <sumit.saxena@avagotech.com> Signed-off-by: Kashyap Desai <kashyap.desai@avagotech.com> Reviewed-by: Tomas Henzl <thenzl@redhat.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Sumit Saxena [Thu, 28 Jan 2016 15:34:22 +0000 (21:04 +0530)]
megaraid_sas: Do not allow PCI access during OCR
This patch will do synhronization between OCR function and AEN function
using "reset_mutex" lock. reset_mutex will be acquired only in the
first half of the AEN function which issues a DCMD. Second half of the
function which calls SCSI API (scsi_add_device/scsi_remove_device)
should be out of reset_mutex to avoid deadlock between scsi_eh thread
and driver.
During chip reset (inside OCR function), there should not be any PCI
access and AEN function (which is called in delayed context) may be
firing DCMDs (doing PCI writes) when chip reset is happening in parallel
which will cause FW fault. This patch will solve the problem by making
AEN thread and OCR thread mutually exclusive.
Signed-off-by: Sumit Saxena <sumit.saxena@avagotech.com> Signed-off-by: Kashyap Desai <kashyap.desai@avagotech.com> Reviewed-by: Tomas Henzl <thenzl@redhat.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Don Brace [Thu, 28 Jan 2016 02:16:26 +0000 (20:16 -0600)]
scsi: Export function scsi_scan.c:sanitize_inquiry_string
The hpsa driver uses this function to cleanup inquiry data. Our new pqi
driver will also use this function. This function was copied into both
drivers.
This patch exports sanitize_inquiry_string so the hpsa and the pqi
drivers can use this function directly.
Suggested-by: Hannes Reinecke <hare@suse.de> Suggested-by: Matthew R. Ochs mrochs@linux.vnet.ibm.com Reviewed-by: Kevin Barnett <kevin.barnett@pmcs.com> Reviewed-by: Justin Lindley <justin.lindley@pmcs.com> Reviewed-by: Scott Teel <scott.teel@pmcs.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Don Brace <don.brace@pmcs.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Himanshu Madhani [Wed, 27 Jan 2016 17:03:38 +0000 (12:03 -0500)]
qla2xxx: Update driver version to 8.07.00.33-k
Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Chad Dupuis [Wed, 27 Jan 2016 17:03:37 +0000 (12:03 -0500)]
qla2xxx: Set relogin flag when we fail to queue login requests.
If we fail to queue an srb for an async login we should set the
relogin flag so it will be retried as the reason for the queuing
failure was most likely transient. Failure to do this can lead to
failed paths as login is never retried if the relogin flag is not
set.
Signed-off-by: Chad Dupuis <chad.dupuis@qlogic.com> Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Joe Carnuccio [Wed, 27 Jan 2016 17:03:34 +0000 (12:03 -0500)]
qla2xxx: Avoid side effects when using endianizer macros.
Signed-off-by: Joe Carnuccio <joe.carnuccio@qlogic.com> Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Joe Carnuccio [Wed, 27 Jan 2016 17:03:29 +0000 (12:03 -0500)]
qla2xxx: Seed init-cb login timeout from nvram exclusively.
Signed-off-by: Joe Carnuccio <joe.carnuccio@qlogic.com> Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Chad Dupuis [Wed, 27 Jan 2016 17:03:28 +0000 (12:03 -0500)]
qla2xxx: Remove unneeded link offline message.
Signed-off-by: Chad Dupuis <chad.dupuis@qlogic.com> Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Jitendra Bhivare [Wed, 20 Jan 2016 08:41:01 +0000 (14:11 +0530)]
be2iscsi: Update the driver version
Driver version: 11.0.0.0
Signed-off-by: Jitendra Bhivare <jitendra.bhivare@avagotech.com> Reviewed-by: Hannes Reinicke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Jitendra Bhivare [Wed, 20 Jan 2016 08:41:00 +0000 (14:11 +0530)]
be2iscsi: Fix WRB leak in login/logout path
Login/Logout loop was hanging after few hours. /var/log/message showed
that alloc_wrb_handle() function was not able to allocate any new WRB.
Sep 11 11:25:22 Jhelum10 kernel: connection32513:0: Could not send nopout
Sep 11 11:25:22 Jhelum10 kernel: scsi host10: BM_4989 : Alloc of WRB_HANDLE
Failed for the CID : 384
Sep 11 11:25:22 Jhelum10 kernel: connection32513:0: Could not allocate pdu for
mgmt task.
Driver allocates WRB to pass login negotiated parameters information to FW
in beiscsi_offload_connection(). This allocated WRB was not freed so there
was WRB_Leak happening.
Put WRB used for posting the login-negotiated parameters back in pool.
Signed-off-by: Jitendra Bhivare <jitendra.bhivare@avagotech.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Jitendra Bhivare [Wed, 20 Jan 2016 08:40:59 +0000 (14:10 +0530)]
be2iscsi: Fix async link event processing
Use only port_link_status only to determine link state change. Only bit
0 is used to get the state. Remove code for processing port_fault.
Fixed get_nic_conf structure definition. Removed rsvd[23] field in
be_cmd_get_nic_conf_resp.
Moved definitions of struct field values below the field.
Signed-off-by: Jitendra Bhivare <jitendra.bhivare@avagotech.com> Reviewed-by: Hannes Reinicke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Jitendra Bhivare [Wed, 20 Jan 2016 08:40:58 +0000 (14:10 +0530)]
be2iscsi: Fix to process 25G link speed info from FW
Async link event provides port_speed info. Cache the port_speed info
and use the same to report in ISCSI_HOST_PARAM_PORT_SPEED query.
Removed link status query IOCTL used to do the same.
Signed-off-by: Jitendra Bhivare <jitendra.bhivare@avagotech.com> Reviewed-by: Hannes Reinicke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Jitendra Bhivare [Wed, 20 Jan 2016 08:40:57 +0000 (14:10 +0530)]
scsi_transport_iscsi: Add 25G and 40G speed definition
iscsi_port_speed and iscsi_port_speed_names have new entries for
25Gbps and 40Gbps link speeds.
Signed-off-by: Jitendra Bhivare <jitendra.bhivare@avagotech.com> Reviewed-by: Hannes Reinicke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Jitendra Bhivare [Wed, 20 Jan 2016 08:40:56 +0000 (14:10 +0530)]
be2iscsi: Fix IOPOLL implementation
OS not responding when running 2 port traffic on 72 CPUs system.
be2iscsi IRQs gets affined to CPU0 when irqbalancer is disabled.
be_iopoll processing completions in BLOCK_IOPOLL_SOFTIRQ hogged CPU0.
1. Use budget to exit the polling loop. beiscsi_process_cq didn't honour
it.
2. Rearming of EQ is done only after iopoll completes.
[mkp: Fixed up blk_iopoll -> irq_poll transition]
Signed-off-by: Jitendra Bhivare <jitendra.bhivare@avagotech.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Jitendra Bhivare [Wed, 20 Jan 2016 08:40:55 +0000 (14:10 +0530)]
be2iscsi: Fix return value for MCC completion
Change return value of completed MCC EBUSY to EINVAL.
Signed-off-by: Jitendra Bhivare <jitendra.bhivare@avagotech.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Jitendra Bhivare [Wed, 20 Jan 2016 08:40:54 +0000 (14:10 +0530)]
be2iscsi: Add FW config validation
System crash in I+T card personality.
Fix to add validation for ULP in initiator mode, physical port number,
and supported queue, icd, cid counts.
Signed-off-by: Jitendra Bhivare <jitendra.bhivare@avagotech.com> Reviewed-by: Hannes Reinicke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Jitendra Bhivare [Wed, 20 Jan 2016 08:40:53 +0000 (14:10 +0530)]
be2iscsi: Fix to handle misconfigured optics events
Log messages for misconfigured transceivers reported by FW.
Register async events that driver handles using MCC_CREATE_EXT ioctl.
Errors messages for faulted/uncertified/unqualified optics are logged.
Added IOCTL to get port_name to be displayed in error message.
Signed-off-by: Jitendra Bhivare <jitendra.bhivare@avagotech.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Jitendra Bhivare [Wed, 20 Jan 2016 08:40:52 +0000 (14:10 +0530)]
be2iscsi: Fix VLAN support for IPv6 network
Configuring VLAN parameters through IPv6 interface was not supported in
driver.
Signed-off-by: Jitendra Bhivare <jitendra.bhivare@avagotech.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Jitendra Bhivare [Wed, 20 Jan 2016 08:40:51 +0000 (14:10 +0530)]
be2iscsi: Fix to remove shutdown entry point
Null pointer dereference in shutdown path after taking dump.
Shutdown path is not needed as FW comes up clean every time during probe
after issuing FUNCTION reset MBOX command.
Signed-off-by: Jitendra Bhivare <jitendra.bhivare@avagotech.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Jitendra Bhivare [Wed, 20 Jan 2016 08:40:50 +0000 (14:10 +0530)]
be2iscsi: Added return value check for mgmt_get_all_if_id
Use of mutex_lock_interruptible can return -EINTR, handle and log the
error.
Signed-off-by: Jitendra Bhivare <jitendra.bhivare@avagotech.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Jitendra Bhivare [Wed, 20 Jan 2016 08:40:49 +0000 (14:10 +0530)]
be2iscsi: Set mbox timeout to 30s
FW recommended timeout for all mbox command is 30s. Use msleep instead
mdelay to relinquish CPU when polling for mbox completion.
Signed-off-by: Jitendra Bhivare <jitendra.bhivare@avagotech.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Jitendra Bhivare [Wed, 20 Jan 2016 08:40:48 +0000 (14:10 +0530)]
be2iscsi: Fix to synchronize tag allocation using spin_lock
alloc_mcc_tag needs to be done under mcc_lock.
Signed-off-by: Jitendra Bhivare <jitendra.bhivare@avagotech.com> Reviewed-by: Hannes Reinicke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Jitendra Bhivare [Wed, 20 Jan 2016 08:40:47 +0000 (14:10 +0530)]
be2iscsi: Fix to use atomic bit operations for tag_state
beiscsi_mccq_compl sets MCC_TAG_STATE_TIMEOUT before setting up
tag_mem_state. be_mcc_compl_process_isr checks for MCC_TAG_STATE_TIMEOUT
first then accesses tag_mem_state which might be still getting populated
in the process context.
Fix: Set MCC_TAG_STATE_TIMEOUT after tag_mem_state is populated.
Removed MCC_TAG_STATE_COMPLETED. When posted its in running state and
the running state is cleared in be_mcc_compl_process_isr. be_mcc_notify
now takes tag argument to set it to running state. Use bit operations
for tag_state. Use barriers before setting the state.
Signed-off-by: Jitendra Bhivare <jitendra.bhivare@avagotech.com> Reviewed-by: Hannes Reinicke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Jitendra Bhivare [Wed, 20 Jan 2016 08:40:46 +0000 (14:10 +0530)]
be2iscsi: Fix mbox synchronization replacing spinlock with mutex
This is second part of actual fix for soft lockup.
All mbox cmds issued using BMBX and MCC are synchronized using mutex
mbox_lock instead of spin_lock. Used mutex_lock_interruptible where ever
possible.
Signed-off-by: Jitendra Bhivare <jitendra.bhivare@avagotech.com> Reviewed-by: Shane Seymour <shane.seymour@hpe.com> Reviewed-by: Hannes Reinicke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Jitendra Bhivare [Wed, 20 Jan 2016 08:40:45 +0000 (14:10 +0530)]
be2iscsi: Fix soft lockup in mgmt_get_all_if_id path using bmbx
We are taking mbox_lock spinlock which disables pre-emption before we
poll for mbox completion. Waiting there with spinlock held in excess of
20s will cause soft lockup.
Actual fix is to change mbox_lock to mutex. The changes are done in
phases. This is the first part.
1. Changed mgmt_get_all_if_id to use MCC where after posting lock is
released.
2. Changed be_mbox_db_ready_wait to busy wait for 12s max and removed
wait_event_timeout. Added error handling code for IO reads.
OPCODE_COMMON_QUERY_FIRMWARE_CONFIG mbox command takes 8s time when
unreachable boot targets configured.
Signed-off-by: Jitendra Bhivare <jitendra.bhivare@avagotech.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Linus Torvalds [Wed, 24 Feb 2016 00:39:21 +0000 (16:39 -0800)]
Merge tag 'nfs-for-4.5-4' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Pull NFS client bugfixes from Trond Myklebust:
"Stable bugfixes:
- Fix nfs_size_to_loff_t
- NFSv4: Fix a dentry leak on alias use
Other bugfixes:
- Don't schedule a layoutreturn if the layout segment can be freed
immediately.
- Always set NFS_LAYOUT_RETURN_REQUESTED with lo->plh_return_iomode
- rpcrdma_bc_receive_call() should init rq_private_buf.len
- fix stateid handling for the NFS v4.2 operations
- pnfs/blocklayout: fix a memeory leak when using,vmalloc_to_page
- fix panic in gss_pipe_downcall() in fips mode
- Fix a race between layoutget and pnfs_destroy_layout
- Fix a race between layoutget and bulk recalls"
* tag 'nfs-for-4.5-4' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
NFSv4.x/pnfs: Fix a race between layoutget and bulk recalls
NFSv4.x/pnfs: Fix a race between layoutget and pnfs_destroy_layout
auth_gss: fix panic in gss_pipe_downcall() in fips mode
pnfs/blocklayout: fix a memeory leak when using,vmalloc_to_page
nfs4: fix stateid handling for the NFS v4.2 operations
NFSv4: Fix a dentry leak on alias use
xprtrdma: rpcrdma_bc_receive_call() should init rq_private_buf.len
pNFS: Always set NFS_LAYOUT_RETURN_REQUESTED with lo->plh_return_iomode
pNFS: Fix pnfs_mark_matching_lsegs_return()
nfs: fix nfs_size_to_loff_t
Linus Torvalds [Tue, 23 Feb 2016 22:58:52 +0000 (14:58 -0800)]
x86: fix SMAP in 32-bit environments
In commit 11f1a4b9755f ("x86: reorganize SMAP handling in user space
accesses") I changed how the stac/clac instructions were generated
around the user space accesses, which then made it possible to do
batched accesses efficiently for user string copies etc.
However, in doing so, I completely spaced out, and didn't even think
about the 32-bit case. And nobody really even seemed to notice, because
SMAP doesn't even exist until modern Skylake processors, and you'd have
to be crazy to run 32-bit kernels on a modern CPU.
Which brings us to Andy Lutomirski.
He actually tested the 32-bit kernel on new hardware, and noticed that
it doesn't work. My bad. The trivial fix is to add the required
uaccess begin/end markers around the raw accesses in <asm/uaccess_32.h>.
I feel a bit bad about this patch, just because that header file really
should be cleaned up to avoid all the duplicated code in it, and this
commit just expands on the problem. But this just fixes the bug without
any bigger cleanup surgery.
Reported-and-tested-by: Andy Lutomirski <luto@kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
projects / linux-beck.git / log