Messages in this thread Patch in this message | | | From | Sasha Levin <> | Subject | [PATCH AUTOSEL 4.9 1/4] scsi: qla2xxx: Fix missed DMA unmap for aborted commands | Date | Wed, 18 May 2022 08:30:13 -0400 |
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From: Gleb Chesnokov <Chesnokov.G@raidix.com>
[ Upstream commit 26f9ce53817a8fd84b69a73473a7de852a24c897 ]
Aborting commands that have already been sent to the firmware can cause BUG in qlt_free_cmd(): BUG_ON(cmd->sg_mapped)
For instance:
- Command passes rdx_to_xfer state, maps sgl, sends to the firmware
- Reset occurs, qla2xxx performs ISP error recovery, aborts the command
- Target stack calls qlt_abort_cmd() and then qlt_free_cmd()
- BUG_ON(cmd->sg_mapped) in qlt_free_cmd() occurs because sgl was not unmapped
Thus, unmap sgl in qlt_abort_cmd() for commands with the aborted flag set.
Link: https://lore.kernel.org/r/AS8PR10MB4952D545F84B6B1DFD39EC1E9DEE9@AS8PR10MB4952.EURPRD10.PROD.OUTLOOK.COM Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com> Signed-off-by: Gleb Chesnokov <Chesnokov.G@raidix.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/scsi/qla2xxx/qla_target.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c index 6ef7a094ee51..b4a21adb3e73 100644 --- a/drivers/scsi/qla2xxx/qla_target.c +++ b/drivers/scsi/qla2xxx/qla_target.c @@ -3286,6 +3286,9 @@ int qlt_abort_cmd(struct qla_tgt_cmd *cmd) spin_lock_irqsave(&cmd->cmd_lock, flags); if (cmd->aborted) { + if (cmd->sg_mapped) + qlt_unmap_sg(vha, cmd); + spin_unlock_irqrestore(&cmd->cmd_lock, flags); /* * It's normal to see 2 calls in this path: -- 2.35.1
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