cxlflash: Fix to avoid stall while waiting on TMF

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Borrowing the TMF waitq's spinlock causes a stall condition when
waiting for the TMF to complete. To remedy, introduce our own spin
lock to serialize TMF and use the appropriate wait services.

Also add a timeout while waiting for a TMF completion. When a TMF
times out, report back a failure such that a bigger hammer reset
can occur.

Signed-off-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
Signed-off-by: Manoj N. Kumar <manoj@linux.vnet.ibm.com>
Reviewed-by: Brian King <brking@linux.vnet.ibm.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: James Bottomley <JBottomley@Odin.com>

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Matthew R. Ochs 2015-10-21 15:13:21 -05:00 • committed by James Bottomley

parent 4392ba49eb

commit 018d1dc955

2 changed files with 34 additions and 22 deletions

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1

drivers/scsi/cxlflash/common.h

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55

drivers/scsi/cxlflash/main.c

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