scsi: lpfc: Correct soft lockup when running mds diagnostics

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[ Upstream commit 0ef01a2d95 ]

When running an mds diagnostic that passes frames with the switch, soft
lockups are detected. The driver is in a CQE processing loop and has
sufficient amount of traffic that it never exits the ring processing routine,
thus the "lockup".

Cap the number of elements in the work processing routine to 64 elements. This
ensures that the cpu will be given up and the handler reschedule to process
additional items.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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James Smart 2018-09-10 10:30:45 -07:00 • committed by Greg Kroah-Hartman

parent c21099be02

commit 591e360bfb

1 changed files with 7 additions and 0 deletions

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drivers/scsi/lpfc/lpfc_sli.c

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