From: Dan Carpenter dan.carpenter@oracle.com
[ 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 --- 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 4fd913522931b..5489a3ae2bedb 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c @@ -896,6 +896,10 @@ 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);