From: Nicolin Chen Date: Sat, 14 Jun 2025 06:35:17 +0000 (-0700) Subject: iommufd: Return EOPNOTSUPP for failures due to driver bugs X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0c6e0ae7a7e49fb0e781d3fbf24004e1b6b586d1;p=thirdparty%2Fkernel%2Flinux.git iommufd: Return EOPNOTSUPP for failures due to driver bugs It's more accurate to report EOPNOTSUPP when an ioctl failed due to driver bug, since there is nothing wrong with the user space side. Link: https://patch.msgid.link/r/623bb6f0e8fdd7b9c5745a2f99f280163f9f1f5a.1749882255.git.nicolinc@nvidia.com Signed-off-by: Nicolin Chen Reviewed-by: Kevin Tian Reviewed-by: Jason Gunthorpe Reviewed-by: Lu Baolu Reviewed-by: Pranjal Shrivastava Signed-off-by: Jason Gunthorpe --- diff --git a/drivers/iommu/iommufd/device.c b/drivers/iommu/iommufd/device.c index ed0dc539d490d..e9b6ca47095c8 100644 --- a/drivers/iommu/iommufd/device.c +++ b/drivers/iommu/iommufd/device.c @@ -1483,7 +1483,7 @@ int iommufd_get_hw_info(struct iommufd_ucmd *ucmd) */ if (WARN_ON_ONCE(cmd->out_data_type == IOMMU_HW_INFO_TYPE_NONE)) { - rc = -ENODEV; + rc = -EOPNOTSUPP; goto out_free; } } else { diff --git a/drivers/iommu/iommufd/hw_pagetable.c b/drivers/iommu/iommufd/hw_pagetable.c index 8565a6f596b23..fe789c2dc0c97 100644 --- a/drivers/iommu/iommufd/hw_pagetable.c +++ b/drivers/iommu/iommufd/hw_pagetable.c @@ -264,7 +264,7 @@ iommufd_hwpt_nested_alloc(struct iommufd_ctx *ictx, hwpt->domain->cookie_type = IOMMU_COOKIE_IOMMUFD; if (WARN_ON_ONCE(hwpt->domain->type != IOMMU_DOMAIN_NESTED)) { - rc = -EINVAL; + rc = -EOPNOTSUPP; goto out_abort; } return hwpt_nested; @@ -321,7 +321,7 @@ iommufd_viommu_alloc_hwpt_nested(struct iommufd_viommu *viommu, u32 flags, hwpt->domain->cookie_type = IOMMU_COOKIE_IOMMUFD; if (WARN_ON_ONCE(hwpt->domain->type != IOMMU_DOMAIN_NESTED)) { - rc = -EINVAL; + rc = -EOPNOTSUPP; goto out_abort; } return hwpt_nested;