linux-kernel - [PATCH 5.14 132/151] drm/msm/a3xx: fix error handling in a3xx_gpu

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Date:   Mon, 18 Oct 2021 15:25:11 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dan Carpenter <dan.carpenter@...cle.com>,
        Rob Clark <robdclark@...omium.org>
Subject: [PATCH 5.14 132/151] drm/msm/a3xx: fix error handling in a3xx_gpu_init()

From: Dan Carpenter <dan.carpenter@...cle.com>

commit 3eda901995371d390ef82d0b6462f4ea8efbcfdf upstream.

These error paths returned 1 on failure, instead of a negative error
code.  This would lead to an Oops in the caller.  A second problem is
that the check for "if (ret != -ENODATA)" did not work because "ret" was
set to 1.

Fixes: 5785dd7a8ef0 ("drm/msm: Fix duplicate gpu node in icc summary")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Link: https://lore.kernel.org/r/20211001125904.GK2283@kili
Signed-off-by: Rob Clark <robdclark@...omium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/gpu/drm/msm/adreno/a3xx_gpu.c |    9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

--- a/drivers/gpu/drm/msm/adreno/a3xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a3xx_gpu.c
@@ -571,13 +571,14 @@ struct msm_gpu *a3xx_gpu_init(struct drm
 	}
 
 	icc_path = devm_of_icc_get(&pdev->dev, "gfx-mem");
-	ret = IS_ERR(icc_path);
-	if (ret)
+	if (IS_ERR(icc_path)) {
+		ret = PTR_ERR(icc_path);
 		goto fail;
+	}
 
 	ocmem_icc_path = devm_of_icc_get(&pdev->dev, "ocmem");
-	ret = IS_ERR(ocmem_icc_path);
-	if (ret) {
+	if (IS_ERR(ocmem_icc_path)) {
+		ret = PTR_ERR(ocmem_icc_path);
 		/* allow -ENODATA, ocmem icc is optional */
 		if (ret != -ENODATA)
 			goto fail;