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From: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
To: 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>,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org,
	freedreno@lists.freedesktop.org
Subject: [PATCH v6 1/4] drm/msm: clean event_thread->worker in case of an error
Date: Sat, 18 Jun 2022 02:33:25 +0300	[thread overview]
Message-ID: <20220617233328.1143665-2-dmitry.baryshkov@linaro.org> (raw)
In-Reply-To: <20220617233328.1143665-1-dmitry.baryshkov@linaro.org>

If worker creation fails, nullify the event_thread->worker, so that
msm_drm_uninit() doesn't try accessing invalid memory location. While we
are at it, remove duplicate assignment to the ret variable.

Fixes: 1041dee2178f ("drm/msm: use kthread_create_worker instead of kthread_run")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/msm/msm_drv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index 44485363f37a..1aab6bf86278 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -436,7 +436,7 @@ static int msm_drm_init(struct device *dev, const struct drm_driver *drv)
 		if (IS_ERR(priv->event_thread[i].worker)) {
 			ret = PTR_ERR(priv->event_thread[i].worker);
 			DRM_DEV_ERROR(dev, "failed to create crtc_event kthread\n");
-			ret = PTR_ERR(priv->event_thread[i].worker);
+			priv->event_thread[i].worker = NULL;
 			goto err_msm_uninit;
 		}
 
-- 
2.35.1


WARNING: multiple messages have this Message-ID (diff)
From: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
To: 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,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	Stephen Boyd <swboyd@chromium.org>,
	freedreno@lists.freedesktop.org
Subject: [PATCH v6 1/4] drm/msm: clean event_thread->worker in case of an error
Date: Sat, 18 Jun 2022 02:33:25 +0300	[thread overview]
Message-ID: <20220617233328.1143665-2-dmitry.baryshkov@linaro.org> (raw)
In-Reply-To: <20220617233328.1143665-1-dmitry.baryshkov@linaro.org>

If worker creation fails, nullify the event_thread->worker, so that
msm_drm_uninit() doesn't try accessing invalid memory location. While we
are at it, remove duplicate assignment to the ret variable.

Fixes: 1041dee2178f ("drm/msm: use kthread_create_worker instead of kthread_run")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/msm/msm_drv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index 44485363f37a..1aab6bf86278 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -436,7 +436,7 @@ static int msm_drm_init(struct device *dev, const struct drm_driver *drv)
 		if (IS_ERR(priv->event_thread[i].worker)) {
 			ret = PTR_ERR(priv->event_thread[i].worker);
 			DRM_DEV_ERROR(dev, "failed to create crtc_event kthread\n");
-			ret = PTR_ERR(priv->event_thread[i].worker);
+			priv->event_thread[i].worker = NULL;
 			goto err_msm_uninit;
 		}
 
-- 
2.35.1


  reply	other threads:[~2022-06-17 23:33 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-06-17 23:33 [PATCH v6 0/4] drm/msm: convet to drm_crtc_handle_vblank() Dmitry Baryshkov
2022-06-17 23:33 ` Dmitry Baryshkov
2022-06-17 23:33 ` Dmitry Baryshkov [this message]
2022-06-17 23:33   ` [PATCH v6 1/4] drm/msm: clean event_thread->worker in case of an error Dmitry Baryshkov
2022-09-08  0:08   ` Abhinav Kumar
2022-09-08  0:08     ` Abhinav Kumar
2022-09-08 14:47     ` Dmitry Baryshkov
2022-09-08 14:47       ` Dmitry Baryshkov
2022-06-17 23:33 ` [PATCH v6 2/4] drm/msm/mdp4: convert to drm_crtc_handle_vblank() Dmitry Baryshkov
2022-06-17 23:33   ` Dmitry Baryshkov
2022-06-17 23:33 ` [PATCH v6 3/4] drm/msm/mdp5: " Dmitry Baryshkov
2022-06-17 23:33   ` Dmitry Baryshkov
2022-06-17 23:33 ` [PATCH v6 4/4] drm/msm: stop storing the array of CRTCs in struct msm_drm_private Dmitry Baryshkov
2022-06-17 23:33   ` Dmitry Baryshkov
2023-01-25  2:14   ` Abhinav Kumar
2023-01-25  2:14     ` Abhinav Kumar
2023-01-25  7:29     ` Dmitry Baryshkov
2023-01-25  7:29       ` Dmitry Baryshkov
2023-01-25 19:16       ` Abhinav Kumar
2023-01-25 19:16         ` Abhinav Kumar
2023-01-09 22:41 ` [PATCH v6 0/4] drm/msm: convet to drm_crtc_handle_vblank() Dmitry Baryshkov
2023-01-09 23:43   ` Dmitry Baryshkov
2023-01-09 23:43   ` Dmitry Baryshkov
2023-01-09 22:41   ` Dmitry Baryshkov

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