From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Date: Mon, 31 Oct 2016 06:35:50 +0000 (+0100)
Subject: drm/nouveau/tegra: Fix error handling
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=91cf301f6ffb854a03c55df39ab04298f12cb000;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

drm/nouveau/tegra: Fix error handling

'iommu_domain_alloc()' returns NULL in case of error, not an error pointer.
So test it accordingly.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
---

diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c b/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c
index 9b638bd905ff..f2bc0b7d9b93 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c
@@ -102,7 +102,7 @@ nvkm_device_tegra_probe_iommu(struct nvkm_device_tegra *tdev)
 
 	if (iommu_present(&platform_bus_type)) {
 		tdev->iommu.domain = iommu_domain_alloc(&platform_bus_type);
-		if (IS_ERR(tdev->iommu.domain))
+		if (!tdev->iommu.domain)
 			goto error;
 
 		/*