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Message-Id: <20220613221019.11399-1-jonathan@marek.ca>
Date: Mon, 13 Jun 2022 18:10:19 -0400
From: Jonathan Marek <jonathan@...ek.ca>
To: freedreno@...ts.freedesktop.org
Cc: Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>,
Abhinav Kumar <quic_abhinavk@...cinc.com>,
David Airlie <airlied@...ux.ie>,
Daniel Vetter <daniel@...ll.ch>,
Jordan Crouse <jordan@...micpenguin.net>,
Bjorn Andersson <bjorn.andersson@...aro.org>,
linux-arm-msm@...r.kernel.org (open list:DRM DRIVER FOR MSM ADRENO GPU),
dri-devel@...ts.freedesktop.org (open list:DRM DRIVER FOR MSM ADRENO
GPU), linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v2] drm/msm: use for_each_sgtable_sg to iterate over scatterlist
The dma_map_sgtable() call (used to invalidate cache) overwrites sgt->nents
with 1, so msm_iommu_pagetable_map maps only the first physical segment.
To fix this problem use for_each_sgtable_sg(), which uses orig_nents.
Fixes: b145c6e65eb0 ("drm/msm: Add support to create a local pagetable")
Signed-off-by: Jonathan Marek <jonathan@...ek.ca>
---
v2: use for_each_sgtable_sg and update commit message
drivers/gpu/drm/msm/msm_iommu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/msm/msm_iommu.c b/drivers/gpu/drm/msm/msm_iommu.c
index bcaddbba564df..a54ed354578b5 100644
--- a/drivers/gpu/drm/msm/msm_iommu.c
+++ b/drivers/gpu/drm/msm/msm_iommu.c
@@ -58,7 +58,7 @@ static int msm_iommu_pagetable_map(struct msm_mmu *mmu, u64 iova,
u64 addr = iova;
unsigned int i;
- for_each_sg(sgt->sgl, sg, sgt->nents, i) {
+ for_each_sgtable_sg(sgt, sg, i) {
size_t size = sg->length;
phys_addr_t phys = sg_phys(sg);
--
2.26.1
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