6.9-stable review patch. If anyone has any objections, please let me know.
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From: John Meneghini jmeneghi@redhat.com
[ 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@redhat.com Cc: Saurav Kashyap skashyap@marvell.com Cc: Nilesh Javali njavali@marvell.com Signed-off-by: John Meneghini jmeneghi@redhat.com Link: https://lore.kernel.org/r/20240403150155.412954-1-jmeneghi@redhat.com Acked-by: Saurav Kashyap skashyap@marvell.com Signed-off-by: Martin K. Petersen martin.petersen@oracle.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/scsi/qedf/qedf_io.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/scsi/qedf/qedf_io.c b/drivers/scsi/qedf/qedf_io.c index bf921caaf6aea..054a51713d556 100644 --- a/drivers/scsi/qedf/qedf_io.c +++ b/drivers/scsi/qedf/qedf_io.c @@ -2324,9 +2324,6 @@ static int qedf_execute_tmf(struct qedf_rport *fcport, u64 tm_lun, 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; @@ -2349,6 +2346,9 @@ static int qedf_execute_tmf(struct qedf_rport *fcport, u64 tm_lun,
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));