scsi: ibmvfc: Send Cancel MAD down each hw SCSI channel

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In general the client needs to send Cancel MADs and task management
commands down the same channel as the command(s) intended to cancel or
abort. The client assigns cancel keys per LUN and thus must send a Cancel
down each channel commands were submitted for that LUN. Further, the client
then must wait for those cancel completions prior to submitting a LUN RESET
or ABORT TASK SET.

Add a cancel rsp iu syncronization field to the ibmvfc_queue struct such
that the cancel routine can sync the cancel response to each queue that
requires a cancel command. Build a list of each cancel event sent and wait
for the completion of each submitted cancel.

Link: https://lore.kernel.org/r/20210114203148.246656-19-tyreld@linux.ibm.com
Reviewed-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

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Tyrel Datwyler 2021-01-14 14:31:45 -06:00 • committed by Martin K. Petersen

parent a61236da7f

commit a835f386f9

2 changed files with 100 additions and 12 deletions

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109

drivers/scsi/ibmvscsi/ibmvfc.c

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3

drivers/scsi/ibmvscsi/ibmvfc.h

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