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| author | Marek Szyprowski <m.szyprowski@samsung.com> | 2016-04-28 07:25:04 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2016-05-02 10:39:58 -0300 |
| commit | 9b15dfe0542fd6f7455c6aeca1cf711192343bf9 (patch) | |
| tree | e4ec03145dd7b6ffd44b8e1a2527b34022ddb670 | |
| parent | 243d4c0270a184e91ae589138652e19394edb1e7 (diff) | |
| download | linux-stable-9b15dfe0542fd6f7455c6aeca1cf711192343bf9.tar.gz linux-stable-9b15dfe0542fd6f7455c6aeca1cf711192343bf9.tar.bz2 linux-stable-9b15dfe0542fd6f7455c6aeca1cf711192343bf9.zip | |
[media] media: s3c-camif: fix deadlock on driver probe()
Commit 0c426c472b5585ed6e59160359c979506d45ae49 ("[media] media: Always
keep a graph walk large enough around") changed
media_device_register_entity() function to take mdev->graph_mutex. This
causes deadlock in driver probe, which calls (indirectly) this function
with ->graph_mutex taken. This patch removes taking ->graph_mutex in
driver probe to avoid deadlock. Other drivers don't take ->graph_mutex
for entity registration, so this change should be safe.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
| -rw-r--r-- | drivers/media/platform/s3c-camif/camif-core.c | 12 |
1 files changed, 3 insertions, 9 deletions
diff --git a/drivers/media/platform/s3c-camif/camif-core.c b/drivers/media/platform/s3c-camif/camif-core.c index 0b44b9accf50..af237af204e2 100644 --- a/drivers/media/platform/s3c-camif/camif-core.c +++ b/drivers/media/platform/s3c-camif/camif-core.c @@ -493,21 +493,17 @@ static int s3c_camif_probe(struct platform_device *pdev) if (ret < 0) goto err_sens; - mutex_lock(&camif->media_dev.graph_mutex); - ret = v4l2_device_register_subdev_nodes(&camif->v4l2_dev); if (ret < 0) - goto err_unlock; + goto err_sens; ret = camif_register_video_nodes(camif); if (ret < 0) - goto err_unlock; + goto err_sens; ret = camif_create_media_links(camif); if (ret < 0) - goto err_unlock; - - mutex_unlock(&camif->media_dev.graph_mutex); + goto err_sens; ret = media_device_register(&camif->media_dev); if (ret < 0) @@ -516,8 +512,6 @@ static int s3c_camif_probe(struct platform_device *pdev) pm_runtime_put(dev); return 0; -err_unlock: - mutex_unlock(&camif->media_dev.graph_mutex); err_sens: v4l2_device_unregister(&camif->v4l2_dev); media_device_unregister(&camif->media_dev); |