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From: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
To: Bjorn Andersson <bjorn.andersson@linaro.org>,
	Rob Clark <robdclark@gmail.com>, Sean Paul <sean@poorly.run>,
	Abhinav Kumar <quic_abhinavk@quicinc.com>
Cc: Stephen Boyd <swboyd@chromium.org>,
	David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
	linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org,
	freedreno@lists.freedesktop.org
Subject: [PATCH 2/3] drm/msm/dpu: fix error handling around dpu_hw_vbif_init
Date: Thu, 17 Feb 2022 06:45:01 +0300	[thread overview]
Message-ID: <20220217034502.464312-2-dmitry.baryshkov@linaro.org> (raw)
In-Reply-To: <20220217034502.464312-1-dmitry.baryshkov@linaro.org>

Using IS_ERR_OR_NULL() together with PTR_ERR() is a typical mistake. If
the value is NULL, then the function will return 0 instead of a proper
return code. Moreover dpu_hw_vbif_init() function can not return NULL.
So, replace corresponding IS_ERR_OR_NULL() call with IS_ERR().

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
index 81a35c8d62e7..f8f1bf3b511d 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -1102,10 +1102,8 @@ static int dpu_kms_hw_init(struct msm_kms *kms)
 
 		dpu_kms->hw_vbif[vbif_idx] = dpu_hw_vbif_init(vbif_idx,
 				dpu_kms->vbif[vbif_idx], dpu_kms->catalog);
-		if (IS_ERR_OR_NULL(dpu_kms->hw_vbif[vbif_idx])) {
+		if (IS_ERR(dpu_kms->hw_vbif[vbif_idx])) {
 			rc = PTR_ERR(dpu_kms->hw_vbif[vbif_idx]);
-			if (!dpu_kms->hw_vbif[vbif_idx])
-				rc = -EINVAL;
 			DPU_ERROR("failed to init vbif %d: %d\n", vbif_idx, rc);
 			dpu_kms->hw_vbif[vbif_idx] = NULL;
 			goto power_error;
-- 
2.34.1


WARNING: multiple messages have this Message-ID (diff)
From: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
To: Bjorn Andersson <bjorn.andersson@linaro.org>,
	Rob Clark <robdclark@gmail.com>, Sean Paul <sean@poorly.run>,
	Abhinav Kumar <quic_abhinavk@quicinc.com>
Cc: David Airlie <airlied@linux.ie>,
	linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org,
	Stephen Boyd <swboyd@chromium.org>,
	freedreno@lists.freedesktop.org
Subject: [PATCH 2/3] drm/msm/dpu: fix error handling around dpu_hw_vbif_init
Date: Thu, 17 Feb 2022 06:45:01 +0300	[thread overview]
Message-ID: <20220217034502.464312-2-dmitry.baryshkov@linaro.org> (raw)
In-Reply-To: <20220217034502.464312-1-dmitry.baryshkov@linaro.org>

Using IS_ERR_OR_NULL() together with PTR_ERR() is a typical mistake. If
the value is NULL, then the function will return 0 instead of a proper
return code. Moreover dpu_hw_vbif_init() function can not return NULL.
So, replace corresponding IS_ERR_OR_NULL() call with IS_ERR().

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
index 81a35c8d62e7..f8f1bf3b511d 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -1102,10 +1102,8 @@ static int dpu_kms_hw_init(struct msm_kms *kms)
 
 		dpu_kms->hw_vbif[vbif_idx] = dpu_hw_vbif_init(vbif_idx,
 				dpu_kms->vbif[vbif_idx], dpu_kms->catalog);
-		if (IS_ERR_OR_NULL(dpu_kms->hw_vbif[vbif_idx])) {
+		if (IS_ERR(dpu_kms->hw_vbif[vbif_idx])) {
 			rc = PTR_ERR(dpu_kms->hw_vbif[vbif_idx]);
-			if (!dpu_kms->hw_vbif[vbif_idx])
-				rc = -EINVAL;
 			DPU_ERROR("failed to init vbif %d: %d\n", vbif_idx, rc);
 			dpu_kms->hw_vbif[vbif_idx] = NULL;
 			goto power_error;
-- 
2.34.1


  reply	other threads:[~2022-02-17  3:45 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-02-17  3:45 [PATCH 1/3] drm/msm/dpu: index dpu_kms->hw_vbif using vbif_idx Dmitry Baryshkov
2022-02-17  3:45 ` Dmitry Baryshkov
2022-02-17  3:45 ` Dmitry Baryshkov [this message]
2022-02-17  3:45   ` [PATCH 2/3] drm/msm/dpu: fix error handling around dpu_hw_vbif_init Dmitry Baryshkov
2022-03-29 21:26   ` Abhinav Kumar
2022-03-29 21:26     ` Abhinav Kumar
2022-02-17  3:45 ` [PATCH 3/3] drm/msm/dpu: drop VBIF indices Dmitry Baryshkov
2022-02-17  3:45   ` Dmitry Baryshkov
2022-03-29 21:52   ` Abhinav Kumar
2022-03-29 21:52     ` Abhinav Kumar
2022-03-29 21:24 ` [PATCH 1/3] drm/msm/dpu: index dpu_kms->hw_vbif using vbif_idx Abhinav Kumar
2022-03-29 21:24   ` Abhinav Kumar

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