This is a note to let you know that I've just added the patch titled
scsi: qla2xxx: Fix DMA-API call trace on NVMe LS requests
to the 6.2-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-fix-dma-api-call-trace-on-nvme-ls-requests.patch
and it can be found in the queue-6.2 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From c75e6aef5039830cce5d4cf764dd204522f89e6b Mon Sep 17 00:00:00 2001
From: Arun Easi <aeasi@xxxxxxxxxxx>
Date: Mon, 19 Dec 2022 03:07:40 -0800
Subject: scsi: qla2xxx: Fix DMA-API call trace on NVMe LS requests
From: Arun Easi <aeasi@xxxxxxxxxxx>
commit c75e6aef5039830cce5d4cf764dd204522f89e6b upstream.
The following message and call trace was seen with debug kernels:
DMA-API: qla2xxx 0000:41:00.0: device driver failed to check map
error [device address=0x00000002a3ff38d8] [size=1024 bytes] [mapped as
single]
WARNING: CPU: 0 PID: 2930 at kernel/dma/debug.c:1017
check_unmap+0xf42/0x1990
Call Trace:
debug_dma_unmap_page+0xc9/0x100
qla_nvme_ls_unmap+0x141/0x210 [qla2xxx]
Remove DMA mapping from the driver altogether, as it is already done by FC
layer. This prevents the warning.
Fixes: c85ab7d9e27a ("scsi: qla2xxx: Fix missed DMA unmap for NVMe ls requests")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Arun Easi <aeasi@xxxxxxxxxxx>
Signed-off-by: Nilesh Javali <njavali@xxxxxxxxxxx>
Reviewed-by: Himanshu Madhani <himanshu.madhani@xxxxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/scsi/qla2xxx/qla_nvme.c | 19 +------------------
1 file changed, 1 insertion(+), 18 deletions(-)
--- a/drivers/scsi/qla2xxx/qla_nvme.c
+++ b/drivers/scsi/qla2xxx/qla_nvme.c
@@ -170,18 +170,6 @@ out:
qla2xxx_rel_qpair_sp(sp->qpair, sp);
}
-static void qla_nvme_ls_unmap(struct srb *sp, struct nvmefc_ls_req *fd)
-{
- if (sp->flags & SRB_DMA_VALID) {
- struct srb_iocb *nvme = &sp->u.iocb_cmd;
- struct qla_hw_data *ha = sp->fcport->vha->hw;
-
- dma_unmap_single(&ha->pdev->dev, nvme->u.nvme.cmd_dma,
- fd->rqstlen, DMA_TO_DEVICE);
- sp->flags &= ~SRB_DMA_VALID;
- }
-}
-
static void qla_nvme_release_ls_cmd_kref(struct kref *kref)
{
struct srb *sp = container_of(kref, struct srb, cmd_kref);
@@ -199,7 +187,6 @@ static void qla_nvme_release_ls_cmd_kref
fd = priv->fd;
- qla_nvme_ls_unmap(sp, fd);
fd->done(fd, priv->comp_status);
out:
qla2x00_rel_sp(sp);
@@ -365,13 +352,10 @@ static int qla_nvme_ls_req(struct nvme_f
nvme->u.nvme.rsp_len = fd->rsplen;
nvme->u.nvme.rsp_dma = fd->rspdma;
nvme->u.nvme.timeout_sec = fd->timeout;
- nvme->u.nvme.cmd_dma = dma_map_single(&ha->pdev->dev, fd->rqstaddr,
- fd->rqstlen, DMA_TO_DEVICE);
+ nvme->u.nvme.cmd_dma = fd->rqstdma;
dma_sync_single_for_device(&ha->pdev->dev, nvme->u.nvme.cmd_dma,
fd->rqstlen, DMA_TO_DEVICE);
- sp->flags |= SRB_DMA_VALID;
-
rval = qla2x00_start_sp(sp);
if (rval != QLA_SUCCESS) {
ql_log(ql_log_warn, vha, 0x700e,
@@ -379,7 +363,6 @@ static int qla_nvme_ls_req(struct nvme_f
wake_up(&sp->nvme_ls_waitq);
sp->priv = NULL;
priv->sp = NULL;
- qla_nvme_ls_unmap(sp, fd);
qla2x00_rel_sp(sp);
return rval;
}
Patches currently in stable-queue which might be from aeasi@xxxxxxxxxxx are
queue-6.2/scsi-qla2xxx-fix-dma-api-call-trace-on-nvme-ls-requests.patch
