{"id":2225433,"url":"http://patchwork.ozlabs.org/api/1.2/patches/2225433/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-tegra/patch/20260421-iommu_map_sgtable-return-v1-3-fb484c07d2a1@nvidia.com/","project":{"id":21,"url":"http://patchwork.ozlabs.org/api/1.2/projects/21/?format=json","name":"Linux Tegra Development","link_name":"linux-tegra","list_id":"linux-tegra.vger.kernel.org","list_email":"linux-tegra@vger.kernel.org","web_url":null,"scm_url":null,"webscm_url":null,"list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20260421-iommu_map_sgtable-return-v1-3-fb484c07d2a1@nvidia.com>","list_archive_url":null,"date":"2026-04-21T04:02:38","name":"[3/4] drm/msm: Fix iommu_map_sgtable() return value check and avoid WARN","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"fc2430ec191a5603cc38d0f55cfe451a94819a8c","submitter":{"id":26499,"url":"http://patchwork.ozlabs.org/api/1.2/people/26499/?format=json","name":"Mikko Perttunen","email":"mperttunen@nvidia.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-tegra/patch/20260421-iommu_map_sgtable-return-v1-3-fb484c07d2a1@nvidia.com/mbox/","series":[{"id":500722,"url":"http://patchwork.ozlabs.org/api/1.2/series/500722/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-tegra/list/?series=500722","date":"2026-04-21T04:02:35","name":"Fix checking of iommu_map_sgtable return value","version":1,"mbox":"http://patchwork.ozlabs.org/series/500722/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2225433/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2225433/checks/","tags":{},"related":[],"headers":{"Return-Path":"\n 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295e1fda-fb65-435d-26b5-08de9f5b03f5","X-MS-Exchange-CrossTenant-AuthSource":"SJ2PR12MB9161.namprd12.prod.outlook.com","X-MS-Exchange-CrossTenant-AuthAs":"Internal","X-MS-Exchange-CrossTenant-OriginalArrivalTime":"21 Apr 2026 04:03:59.1759\n (UTC)","X-MS-Exchange-CrossTenant-FromEntityHeader":"Hosted","X-MS-Exchange-CrossTenant-Id":"43083d15-7273-40c1-b7db-39efd9ccc17a","X-MS-Exchange-CrossTenant-MailboxType":"HOSTED","X-MS-Exchange-CrossTenant-UserPrincipalName":"\n 04ZnpuNriuolhL+xGN/8kjJJXAhxc2pm/LHWtbDQ67lttgerxAFXsKu0y8ObPxFygT8eByKzXDHUGeuEk0n9MA==","X-MS-Exchange-Transport-CrossTenantHeadersStamped":"PH7PR12MB7985"},"content":"Commit \"iommu: return full error code from iommu_map_sg[_atomic]()\"\nchanged iommu_map_sgtable() to return an ssize_t and negative values\nin error cases, rather than a size_t and a zero.\n\nStore the return value in the appropriate type and in case of error,\nreturn it rather than WARNing.\n\nFixes: ad8f36e4b6b1 (\"iommu: return full error code from iommu_map_sg[_atomic]()\")\nSigned-off-by: Mikko Perttunen \n---\n drivers/gpu/drm/msm/msm_iommu.c | 5 +++--\n 1 file changed, 3 insertions(+), 2 deletions(-)","diff":"diff --git a/drivers/gpu/drm/msm/msm_iommu.c b/drivers/gpu/drm/msm/msm_iommu.c\nindex 7d449e5202c5..058c71c82cf5 100644\n--- a/drivers/gpu/drm/msm/msm_iommu.c\n+++ b/drivers/gpu/drm/msm/msm_iommu.c\n@@ -677,7 +677,7 @@ static int msm_iommu_map(struct msm_mmu *mmu, uint64_t iova,\n \t\t\t int prot)\n {\n \tstruct msm_iommu *iommu = to_msm_iommu(mmu);\n-\tsize_t ret;\n+\tssize_t ret;\n \n \tWARN_ON(off != 0);\n \n@@ -686,7 +686,8 @@ static int msm_iommu_map(struct msm_mmu *mmu, uint64_t iova,\n \t\tiova |= GENMASK_ULL(63, 49);\n \n \tret = iommu_map_sgtable(iommu->domain, iova, sgt, prot);\n-\tWARN_ON(!ret);\n+\tif (ret < 0)\n+\t\treturn ret;\n \n \treturn (ret == len) ? 0 : -EINVAL;\n }\n","prefixes":["3/4"]}