scsi: hisi_sas: complete all tasklets prior to host reset

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The CQ event is handled in tasklet context, and it could be delayed if
the system loading is high.

It is possible to run into some problems when executing a host reset
when cq_tasklet_vx_hw() is being executed.

So, prior to host reset, execute tasklet_kill() to ensure that all CQ
tasklets are complete.

Besides, as the function hisi_sas_wait_tasklets_done() is added to do
tasklet_kill(), this patch refactors some code where tasklet_kill() is
used.

Signed-off-by: Xiaofei Tan <tanxiaofei@huawei.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

...

This commit is contained in:

Xiaofei Tan 2017-10-24 23:51:47 +08:00 • committed by Martin K. Petersen

parent 13cd5ed612

commit 571295f805

4 changed files with 16 additions and 7 deletions

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1

drivers/scsi/hisi_sas/hisi_sas.h

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11

drivers/scsi/hisi_sas/hisi_sas_main.c

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8

drivers/scsi/hisi_sas/hisi_sas_v2_hw.c

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3

drivers/scsi/hisi_sas/hisi_sas_v3_hw.c

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