diff options
| author | Marek Szyprowski <m.szyprowski@samsung.com> | 2016-04-28 07:25:03 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2016-05-02 10:39:26 -0300 |
| commit | 243d4c0270a184e91ae589138652e19394edb1e7 (patch) | |
| tree | a2dfe53bf2e5ff7f04fb28a023245d4f7fd0c094 /drivers/media | |
| parent | 89a095668304e8a02502ffd35edacffdbf49aa8c (diff) | |
| download | linux-243d4c0270a184e91ae589138652e19394edb1e7.tar.bz2 | |
[media] media: exynos4-is: 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>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Tested-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/platform/exynos4-is/media-dev.c | 13 |
1 files changed, 2 insertions, 11 deletions
diff --git a/drivers/media/platform/exynos4-is/media-dev.c b/drivers/media/platform/exynos4-is/media-dev.c index feb521f28e14..4f494acd8150 100644 --- a/drivers/media/platform/exynos4-is/media-dev.c +++ b/drivers/media/platform/exynos4-is/media-dev.c @@ -1446,22 +1446,13 @@ static int fimc_md_probe(struct platform_device *pdev) platform_set_drvdata(pdev, fmd); - /* Protect the media graph while we're registering entities */ - mutex_lock(&fmd->media_dev.graph_mutex); - ret = fimc_md_register_platform_entities(fmd, dev->of_node); - if (ret) { - mutex_unlock(&fmd->media_dev.graph_mutex); + if (ret) goto err_clk; - } ret = fimc_md_register_sensor_entities(fmd); - if (ret) { - mutex_unlock(&fmd->media_dev.graph_mutex); + if (ret) goto err_m_ent; - } - - mutex_unlock(&fmd->media_dev.graph_mutex); ret = device_create_file(&pdev->dev, &dev_attr_subdev_conf_mode); if (ret) |