This is a note to let you know that I've just added the patch titled
accel/qaic: Fix the for loop used to walk SG table
to the 6.11-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:
accel-qaic-fix-the-for-loop-used-to-walk-sg-table.patch
and it can be found in the queue-6.11 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit bc84fc504a03d21eebe1104aa2ab50556d540e5d
Author: Pranjal Ramajor Asha Kanojiya <quic_pkanojiy@xxxxxxxxxxx>
Date: Fri Oct 4 13:32:52 2024 -0600
accel/qaic: Fix the for loop used to walk SG table
[ Upstream commit c5e8e93897b7bb0a336bf3332f82f8d9f2b33f14 ]
Only for_each_sgtable_dma_sg() should be used to walk through a SG table
to grab correct bus address and length pair after calling DMA MAP API on
a SG table as DMA MAP APIs updates the SG table and for_each_sgtable_sg()
walks through the original SG table.
Fixes: ff13be830333 ("accel/qaic: Add datapath")
Fixes: 129776ac2e38 ("accel/qaic: Add control path")
Signed-off-by: Pranjal Ramajor Asha Kanojiya <quic_pkanojiy@xxxxxxxxxxx>
Reviewed-by: Jeffrey Hugo <quic_jhugo@xxxxxxxxxxx>
Signed-off-by: Jeffrey Hugo <quic_jhugo@xxxxxxxxxxx>
Reviewed-by: Jacek Lawrynowicz <jacek.lawrynowicz@xxxxxxxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20241004193252.3888544-1-quic_jhugo@xxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/accel/qaic/qaic_control.c b/drivers/accel/qaic/qaic_control.c
index 9e8a8cbadf6bb..d8bdab69f8009 100644
--- a/drivers/accel/qaic/qaic_control.c
+++ b/drivers/accel/qaic/qaic_control.c
@@ -496,7 +496,7 @@ static int encode_addr_size_pairs(struct dma_xfer *xfer, struct wrapper_list *wr
nents = sgt->nents;
nents_dma = nents;
*size = QAIC_MANAGE_EXT_MSG_LENGTH - msg_hdr_len - sizeof(**out_trans);
- for_each_sgtable_sg(sgt, sg, i) {
+ for_each_sgtable_dma_sg(sgt, sg, i) {
*size -= sizeof(*asp);
/* Save 1K for possible follow-up transactions. */
if (*size < SZ_1K) {
diff --git a/drivers/accel/qaic/qaic_data.c b/drivers/accel/qaic/qaic_data.c
index e86e71c1cdd86..c20eb63750f51 100644
--- a/drivers/accel/qaic/qaic_data.c
+++ b/drivers/accel/qaic/qaic_data.c
@@ -184,7 +184,7 @@ static int clone_range_of_sgt_for_slice(struct qaic_device *qdev, struct sg_tabl
nents = 0;
size = size ? size : PAGE_SIZE;
- for (sg = sgt_in->sgl; sg; sg = sg_next(sg)) {
+ for_each_sgtable_dma_sg(sgt_in, sg, j) {
len = sg_dma_len(sg);
if (!len)
@@ -221,7 +221,7 @@ static int clone_range_of_sgt_for_slice(struct qaic_device *qdev, struct sg_tabl
/* copy relevant sg node and fix page and length */
sgn = sgf;
- for_each_sgtable_sg(sgt, sg, j) {
+ for_each_sgtable_dma_sg(sgt, sg, j) {
memcpy(sg, sgn, sizeof(*sg));
if (sgn == sgf) {
sg_dma_address(sg) += offf;
@@ -301,7 +301,7 @@ static int encode_reqs(struct qaic_device *qdev, struct bo_slice *slice,
* fence.
*/
dev_addr = req->dev_addr;
- for_each_sgtable_sg(slice->sgt, sg, i) {
+ for_each_sgtable_dma_sg(slice->sgt, sg, i) {
slice->reqs[i].cmd = cmd;
slice->reqs[i].src_addr = cpu_to_le64(slice->dir == DMA_TO_DEVICE ?
sg_dma_address(sg) : dev_addr);
