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scsi: qla2xxx: Simplify the code for aborting SCSI commands

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[ Upstream commit c81ef0ed4477c637d1f1dd96ecd8e8fbe18b7283 ]

Since the SCSI core does not reuse the tag of the SCSI command that is
being aborted by .eh_abort() before .eh_abort() has finished it is not
necessary to check from inside that callback whether or not the SCSI
command has already completed. Instead, rely on the firmware to return an
error code when attempting to abort a command that has already
completed. Additionally, rely on the firmware to return an error code when
attempting to abort an already aborted command.

In qla2x00_abort_srb(), use blk_mq_request_started() instead of
sp->completed and sp->aborted.

Link: https://lore.kernel.org/r/20200220043441.20504-2-bvanassche@acm.org
Cc: Martin Wilck <mwilck@suse.com>
Cc: Quinn Tran <qutran@marvell.com>
Reviewed-by: Daniel Wagner <dwagner@suse.de>
Reviewed-by: Roman Bolshakov <r.bolshakov@yadro.com>
Acked-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Stable-dep-of: 19597cad64d6 ("scsi: qla2xxx: Fix system crash due to bad pointer access")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Bart Van Assche 2020-02-19 20:34:37 -08:00 committed by Greg Kroah-Hartman
parent 30511f37c9
commit 66cd605530
3 changed files with 14 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/scsi/qla2xxx/qla_def.h
View File

@ -596,9 +596,6 @@ typedef struct srb {
struct fc_port *fcport;
struct scsi_qla_host *vha;
unsigned int start_timer:1;
unsigned int abort:1;
unsigned int aborted:1;
unsigned int completed:1;
uint32_t handle;
uint16_t flags;

5
drivers/scsi/qla2xxx/qla_isr.c
View File

@ -2479,11 +2479,6 @@ qla2x00_status_entry(scsi_qla_host_t *vha, struct rsp_que *rsp, void *pkt)
return;
}
if (sp->abort)
sp->aborted = 1;
else
sp->completed = 1;
if (sp->cmd_type != TYPE_SRB) {
req->outstanding_cmds[handle] = NULL;
ql_dbg(ql_dbg_io, vha, 0x3015,

27
drivers/scsi/qla2xxx/qla_os.c
View File

@ -1243,17 +1243,6 @@ qla2xxx_eh_abort(struct scsi_cmnd *cmd)
return fast_fail_status != SUCCESS ? fast_fail_status : FAILED;
spin_lock_irqsave(qpair->qp_lock_ptr, flags);
if (sp->completed) {
spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
return SUCCESS;
}
if (sp->abort || sp->aborted) {
spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
return FAILED;
}
sp->abort = 1;
sp->comp = &comp;
spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
@ -1661,6 +1650,10 @@ qla2x00_loop_reset(scsi_qla_host_t *vha)
return QLA_SUCCESS;
}
/*
* The caller must ensure that no completion interrupts will happen
* while this function is in progress.
*/
static void qla2x00_abort_srb(struct qla_qpair *qp, srb_t *sp, const int res,
unsigned long *flags)
__releases(qp->qp_lock_ptr)
@ -1669,6 +1662,7 @@ static void qla2x00_abort_srb(struct qla_qpair *qp, srb_t *sp, const int res,
DECLARE_COMPLETION_ONSTACK(comp);
scsi_qla_host_t *vha = qp->vha;
struct qla_hw_data *ha = vha->hw;
struct scsi_cmnd *cmd = GET_CMD_SP(sp);
int rval;
bool ret_cmd;
uint32_t ratov_j;
@ -1688,7 +1682,6 @@ static void qla2x00_abort_srb(struct qla_qpair *qp, srb_t *sp, const int res,
}
sp->comp = &comp;
sp->abort = 1;
spin_unlock_irqrestore(qp->qp_lock_ptr, *flags);
rval = ha->isp_ops->abort_command(sp);
@ -1712,13 +1705,17 @@ static void qla2x00_abort_srb(struct qla_qpair *qp, srb_t *sp, const int res,
}
spin_lock_irqsave(qp->qp_lock_ptr, *flags);
if (ret_cmd && (!sp->completed || !sp->aborted))
if (ret_cmd && blk_mq_request_started(cmd->request))
sp->done(sp, res);
} else {
sp->done(sp, res);
}
}
/*
* The caller must ensure that no completion interrupts will happen
* while this function is in progress.
*/
static void
__qla2x00_abort_all_cmds(struct qla_qpair *qp, int res)
{
@ -1776,6 +1773,10 @@ __qla2x00_abort_all_cmds(struct qla_qpair *qp, int res)
spin_unlock_irqrestore(qp->qp_lock_ptr, flags);
}
/*
* The caller must ensure that no completion interrupts will happen
* while this function is in progress.
*/
void
qla2x00_abort_all_cmds(scsi_qla_host_t *vha, int res)
{