scsi: hisi_sas: Keep controller active between ISR of phyup and the event being processed

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It is possible that controller may become suspended between processing a
phyup interrupt and the event being processed by libsas. As such, we can't
ensure the controller is active when processing the phyup event - this may
cause the phyup event to be lost or other issues.  To avoid any possible
issues, add pm_runtime_get_noresume() in phyup interrupt handler and
pm_runtime_put_sync() in the work handler exit to ensure that we stay
always active. Since we only want to call pm_runtime_get_noresume() for v3
hw, signal this will a new event, HISI_PHYE_PHY_UP_PM.

Link: https://lore.kernel.org/r/1639999298-244569-14-git-send-email-chenxiang66@hisilicon.com
Acked-by: John Garry <john.garry@huawei.com>
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

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Xiang Chen 2021-12-20 19:21:36 +08:00 • committed by Martin K. Petersen

parent bf19aea460

commit ae9b69e85e

3 changed files with 24 additions and 3 deletions

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1

drivers/scsi/hisi_sas/hisi_sas.h

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22

drivers/scsi/hisi_sas/hisi_sas_main.c

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4

drivers/scsi/hisi_sas/hisi_sas_v3_hw.c

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