scsi: lpfc: Fix hdwq sgl locks and irq handling

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Many of the sgl-per-hdwq paths are locking with spin_lock_irq() and
spin_unlock_irq() and may unwittingly raising irq when it shouldn't. Hard
deadlocks were seen around lpfc_scsi_prep_cmnd().

Fix by converting the locks to irqsave/irqrestore.

Fixes: d79c9e9d4b ("scsi: lpfc: Support dynamic unbounded SGL lists on G7 hardware.")
Link: https://lore.kernel.org/r/20190922035906.10977-16-jsmart2021@gmail.com
Signed-off-by: Dick Kennedy <dick.kennedy@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 2019-09-21 20:59:01 -07:00 • committed by Martin K. Petersen

parent d38b4a527f

commit a4c21acca2

1 changed files with 22 additions and 16 deletions

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drivers/scsi/lpfc/lpfc_sli.c

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