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scsi: qedf: Add synchronization between I/O completions and abort

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Avoid race condition between I/O completion and abort processing by
protecting the cmd_type with the rport lock.

Signed-off-by: Javed Hasan <jhasan@marvell.com>
Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Link: https://lore.kernel.org/r/20230901060646.27885-1-skashyap@marvell.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Javed Hasan 2023-09-01 11:36:46 +05:30 committed by Martin K. Petersen
parent 5c584fe609
commit 7df0b26054
2 changed files with 14 additions and 3 deletions
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10
drivers/scsi/qedf/qedf_io.c
View File

@ -1904,6 +1904,7 @@ int qedf_initiate_abts(struct qedf_ioreq *io_req, bool return_scsi_cmd_on_abts)
goto drop_rdata_kref;
}
spin_lock_irqsave(&fcport->rport_lock, flags);
if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags) ||
test_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags) ||
test_bit(QEDF_CMD_IN_ABORT, &io_req->flags)) {
@ -1911,17 +1912,20 @@ int qedf_initiate_abts(struct qedf_ioreq *io_req, bool return_scsi_cmd_on_abts)
"io_req xid=0x%x sc_cmd=%p already in cleanup or abort processing or already completed.\n",
io_req->xid, io_req->sc_cmd);
rc = 1;
spin_unlock_irqrestore(&fcport->rport_lock, flags);
goto drop_rdata_kref;
}
/* Set the command type to abort */
io_req->cmd_type = QEDF_ABTS;
spin_unlock_irqrestore(&fcport->rport_lock, flags);
kref_get(&io_req->refcount);
xid = io_req->xid;
qedf->control_requests++;
qedf->packet_aborts++;
/* Set the command type to abort */
io_req->cmd_type = QEDF_ABTS;
io_req->return_scsi_cmd_on_abts = return_scsi_cmd_on_abts;
set_bit(QEDF_CMD_IN_ABORT, &io_req->flags);
@ -2210,7 +2214,9 @@ process_els:
refcount, fcport, fcport->rdata->ids.port_id);
/* Cleanup cmds re-use the same TID as the original I/O */
spin_lock_irqsave(&fcport->rport_lock, flags);
io_req->cmd_type = QEDF_CLEANUP;
spin_unlock_irqrestore(&fcport->rport_lock, flags);
io_req->return_scsi_cmd_on_abts = return_scsi_cmd_on_abts;
init_completion(&io_req->cleanup_done);

7
drivers/scsi/qedf/qedf_main.c
View File

@ -2805,6 +2805,8 @@ void qedf_process_cqe(struct qedf_ctx *qedf, struct fcoe_cqe *cqe)
struct qedf_ioreq *io_req;
struct qedf_rport *fcport;
u32 comp_type;
u8 io_comp_type;
unsigned long flags;
comp_type = (cqe->cqe_data >> FCOE_CQE_CQE_TYPE_SHIFT) &
FCOE_CQE_CQE_TYPE_MASK;
@ -2838,11 +2840,14 @@ void qedf_process_cqe(struct qedf_ctx *qedf, struct fcoe_cqe *cqe)
return;
}
spin_lock_irqsave(&fcport->rport_lock, flags);
io_comp_type = io_req->cmd_type;
spin_unlock_irqrestore(&fcport->rport_lock, flags);
switch (comp_type) {
case FCOE_GOOD_COMPLETION_CQE_TYPE:
atomic_inc(&fcport->free_sqes);
switch (io_req->cmd_type) {
switch (io_comp_type) {
case QEDF_SCSI_CMD:
qedf_scsi_completion(qedf, cqe, io_req);
break;