linux-kernel - [PATCH] drm/nouveau/tegra: Modify error handling

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Date:	Mon, 15 Aug 2016 10:24:09 +0530
From:	Amitoj Kaur Chawla <amitoj1606@...il.com>
To:	bskeggs@...hat.com, airlied@...ux.ie, swarren@...dotorg.org,
	thierry.reding@...il.com, gnurou@...il.com,
	dri-devel@...ts.freedesktop.org, nouveau@...ts.freedesktop.org,
	linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:	julia.lawall@...6.fr
Subject: [PATCH] drm/nouveau/tegra: Modify error handling

iommu_domain_alloc returns NULL on error so replace an incorrect
IS_ERR check with a NULL check.

The Coccinelle semantic patch used to find this issue is as follows:
@@
expression e;
statement S;
@@

*e = iommu_domain_alloc(...);
if (IS_ERR(e)) S

Signed-off-by: Amitoj Kaur Chawla <amitoj1606@...il.com>
---
 drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c b/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c
index 939682f..ffd8def 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;
 
 		/*
-- 
1.9.1