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drm/msm: potential error pointer dereference in init()

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[ Upstream commit b6816441a1 ]

The msm_iommu_new() returns error pointers on failure so check for that
to avoid an Oops.

Fixes: ccac7ce373 ("drm/msm: Refactor address space initialization")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Abhinav Kumar <abhinavk@codeaurora.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20211004103806.GD25015@kili
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Dan Carpenter 2021-10-04 13:38:06 +03:00 committed by Greg Kroah-Hartman
parent a342cb4772
commit 3424931fa3
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
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@ -846,6 +846,10 @@ static int _dpu_kms_mmu_init(struct dpu_kms *dpu_kms)
return 0; return 0;
mmu = msm_iommu_new(dpu_kms->dev->dev, domain); mmu = msm_iommu_new(dpu_kms->dev->dev, domain);
if (IS_ERR(mmu)) {
iommu_domain_free(domain);
return PTR_ERR(mmu);
}
aspace = msm_gem_address_space_create(mmu, "dpu1", aspace = msm_gem_address_space_create(mmu, "dpu1",
0x1000, 0x100000000 - 0x1000); 0x1000, 0x100000000 - 0x1000);