This is a note to let you know that I've just added the patch titled
scsi: qla2xxx: Simplify the code for aborting SCSI commands
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
scsi-qla2xxx-simplify-the-code-for-aborting-scsi-com.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit b9082ca9d25d2ef2cb12cd011dbb577ef1d7da4e
Author: Bart Van Assche <bvanassche@xxxxxxx>
Date: Wed Feb 19 20:34:37 2020 -0800
scsi: qla2xxx: Simplify the code for aborting SCSI commands
[ 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@xxxxxxx
Cc: Martin Wilck <mwilck@xxxxxxxx>
Cc: Quinn Tran <qutran@xxxxxxxxxxx>
Reviewed-by: Daniel Wagner <dwagner@xxxxxxx>
Reviewed-by: Roman Bolshakov <r.bolshakov@xxxxxxxxx>
Acked-by: Himanshu Madhani <hmadhani@xxxxxxxxxxx>
Signed-off-by: Bart Van Assche <bvanassche@xxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Stable-dep-of: 19597cad64d6 ("scsi: qla2xxx: Fix system crash due to bad pointer access")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index 2ef6277244f57..bfddae586995a 100644
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -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;
diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c
index aca8ec3ff9391..c5021bd1ad5e5 100644
--- a/drivers/scsi/qla2xxx/qla_isr.c
+++ b/drivers/scsi/qla2xxx/qla_isr.c
@@ -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,
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index 57f8d2378f778..8329b80c41eb7 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -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 = ∁
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 = ∁
- 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)
{
