4.2-stable review patch. If anyone has any objections, please let me know.
------------------
From: Sakari Ailus <sakari.ai...@iki.fi>
commit 5d479386983c5f1bb1aff4f88a027b6143f88a39 upstream.
The async notifier was registered before the v4l2_device was registered and
before the notifier callbacks were set. This could lead to missing the
bound() and complete() callbacks and to attempting to spin_lock() and
uninitialised spin lock.
Also fix unregistering the async notifier in the case of an error --- the
function may not fail anymore after the notifier is registered.
Fixes: da7f3843d2c7 ("[media] omap3isp: Add support for the Device Tree")
Signed-off-by: Sakari Ailus <sakari.ai...@iki.fi>
Reviewed-by: Sebastian Reichel <s...@kernel.org>
Signed-off-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mche...@osg.samsung.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/media/platform/omap3isp/isp.c | 23 +++++++++++++----------
1 file changed, 13 insertions(+), 10 deletions(-)
--- a/drivers/media/platform/omap3isp/isp.c
+++ b/drivers/media/platform/omap3isp/isp.c
@@ -2000,10 +2000,8 @@ static int isp_register_entities(struct
ret = v4l2_device_register_subdev_nodes(&isp->v4l2_dev);
done:
- if (ret < 0) {
+ if (ret < 0)
isp_unregister_entities(isp);
- v4l2_async_notifier_unregister(&isp->notifier);
- }
return ret;
}
@@ -2423,10 +2421,6 @@ static int isp_probe(struct platform_dev
ret = isp_of_parse_nodes(&pdev->dev, &isp->notifier);
if (ret < 0)
return ret;
- ret = v4l2_async_notifier_register(&isp->v4l2_dev,
- &isp->notifier);
- if (ret)
- return ret;
} else {
isp->pdata = pdev->dev.platform_data;
isp->syscon = syscon_regmap_lookup_by_pdevname("syscon.0");
@@ -2557,18 +2551,27 @@ static int isp_probe(struct platform_dev
if (ret < 0)
goto error_iommu;
- isp->notifier.bound = isp_subdev_notifier_bound;
- isp->notifier.complete = isp_subdev_notifier_complete;
-
ret = isp_register_entities(isp);
if (ret < 0)
goto error_modules;
+ if (IS_ENABLED(CONFIG_OF) && pdev->dev.of_node) {
+ isp->notifier.bound = isp_subdev_notifier_bound;
+ isp->notifier.complete = isp_subdev_notifier_complete;
+
+ ret = v4l2_async_notifier_register(&isp->v4l2_dev,
+ &isp->notifier);
+ if (ret)
+ goto error_register_entities;
+ }
+
isp_core_init(isp, 1);
omap3isp_put(isp);
return 0;
+error_register_entities:
+ isp_unregister_entities(isp);
error_modules:
isp_cleanup_modules(isp);
error_iommu:
--
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