This is a note to let you know that I've just added the patch titled
scsi: qedf: Make qedf_execute_tmf() non-preemptible
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-qedf-make-qedf_execute_tmf-non-preemptible.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 446c7fbe8e28c7f0565a85ff12ad47e51b41e531
Author: John Meneghini <jmeneghi@xxxxxxxxxx>
Date: Wed Apr 3 11:01:55 2024 -0400
scsi: qedf: Make qedf_execute_tmf() non-preemptible
[ Upstream commit 0d8b637c9c5eeaa1a4e3dfb336f3ff918eb64fec ]
Stop calling smp_processor_id() from preemptible code in
qedf_execute_tmf90. This results in BUG_ON() when running an RT kernel.
[ 659.343280] BUG: using smp_processor_id() in preemptible [00000000] code: sg_reset/3646
[ 659.343282] caller is qedf_execute_tmf+0x8b/0x360 [qedf]
Tested-by: Guangwu Zhang <guazhang@xxxxxxxxxx>
Cc: Saurav Kashyap <skashyap@xxxxxxxxxxx>
Cc: Nilesh Javali <njavali@xxxxxxxxxxx>
Signed-off-by: John Meneghini <jmeneghi@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20240403150155.412954-1-jmeneghi@xxxxxxxxxx
Acked-by: Saurav Kashyap <skashyap@xxxxxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/scsi/qedf/qedf_io.c b/drivers/scsi/qedf/qedf_io.c
index d02d1ef0d0116..dc1ba29c16762 100644
--- a/drivers/scsi/qedf/qedf_io.c
+++ b/drivers/scsi/qedf/qedf_io.c
@@ -2330,9 +2330,6 @@ static int qedf_execute_tmf(struct qedf_rport *fcport, struct scsi_cmnd *sc_cmd,
io_req->fcport = fcport;
io_req->cmd_type = QEDF_TASK_MGMT_CMD;
- /* Record which cpu this request is associated with */
- io_req->cpu = smp_processor_id();
-
/* Set TM flags */
io_req->io_req_flags = QEDF_READ;
io_req->data_xfer_len = 0;
@@ -2354,6 +2351,9 @@ static int qedf_execute_tmf(struct qedf_rport *fcport, struct scsi_cmnd *sc_cmd,
spin_lock_irqsave(&fcport->rport_lock, flags);
+ /* Record which cpu this request is associated with */
+ io_req->cpu = smp_processor_id();
+
sqe_idx = qedf_get_sqe_idx(fcport);
sqe = &fcport->sq[sqe_idx];
memset(sqe, 0, sizeof(struct fcoe_wqe));
