cxlflash: Fix potential oops following LUN removal

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When a LUN is removed, the sdev that is associated with the LUN
remains intact until its reference count drops to 0. In order
to prevent an sdev from being removed while a context is still
associated with it, obtain an additional reference per-context
for each LUN attached to the context.

This resolves a potential Oops in the release handler when a
dealing with a LUN that has already been removed.

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 15:11:18 -05:00 • committed by James Bottomley

parent 471a5a60aa

commit 22fe1ae80f

1 changed files with 23 additions and 12 deletions

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35

drivers/scsi/cxlflash/superpipe.c

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