scsi: ibmvscsi: Protect ibmvscsi_head from concurrent modificaiton

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For each ibmvscsi host created during a probe or destroyed during a remove
we either add or remove that host to/from the global ibmvscsi_head
list. This runs the risk of concurrent modification.

This patch adds a simple spinlock around the list modification calls to
prevent concurrent updates as is done similarly in the ibmvfc driver and
ipr driver.

Fixes: 32d6e4b6e4 ("scsi: ibmvscsi: add vscsi hosts to global list_head")
Cc: <stable@vger.kernel.org> # v4.10+
Signed-off-by: Tyrel Datwyler <tyreld@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

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Tyrel Datwyler 2019-03-20 13:41:50 -05:00 • committed by Martin K. Petersen

parent 0e83fc61ee

commit 7205981e04

1 changed files with 5 additions and 0 deletions

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drivers/scsi/ibmvscsi/ibmvscsi.c

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