scsi: lpfc: Clear outstanding active mailbox during PCI function reset

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Mailbox commands sent via ioctl/bsg from user applications may be
interrupted from processing by a concurrently triggered PCI function
reset. The command will not generate a completion due to the reset.  This
results in a user application hang waiting for the mailbox command to
complete.

Resolve by changing the function reset handler to detect that there was an
outstanding mailbox command and simulate a mailbox completion.  Add some
additional debug when a mailbox command times out.

Link: https://lore.kernel.org/r/20210707184351.67872-13-jsmart2021@gmail.com
Co-developed-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

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James Smart 2021-07-07 11:43:43 -07:00 • committed by Martin K. Petersen

parent affbe24429

commit a9978e3978

2 changed files with 40 additions and 3 deletions

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11

drivers/scsi/lpfc/lpfc_init.c

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32

drivers/scsi/lpfc/lpfc_sli.c

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