From: Dan Carpenter dan.carpenter@oracle.com
stable inclusion from stable-5.10.80 commit 3424931fa39e90b9beeb309380189ff1d1b18cb5 bugzilla: 185821 https://gitee.com/openeuler/kernel/issues/I4L7CG
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit b6816441a14bbe356ba8590de79cfea2de6a085c ]
The msm_iommu_new() returns error pointers on failure so check for that to avoid an Oops.
Fixes: ccac7ce373c1 ("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 Signed-off-by: Chen Jun chenjun102@huawei.com Reviewed-by: Weilong Chen chenweilong@huawei.com Acked-by: Weilong Chen chenweilong@huawei.com
Signed-off-by: Chen Jun chenjun102@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c index c8217f4858a1..b4a2e8eb35dd 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c @@ -846,6 +846,10 @@ static int _dpu_kms_mmu_init(struct dpu_kms *dpu_kms) return 0;
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", 0x1000, 0x100000000 - 0x1000);