linux-kernel - [PATCH 2/3] media: atmel: atmel-isc: fix INIT

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Date:   Fri, 12 Apr 2019 10:19:46 +0000
From:   <Eugen.Hristev@...rochip.com>
To:     <linux-media@...r.kernel.org>, <hverkuil@...all.nl>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
CC:     <Nicolas.Ferre@...rochip.com>, <mchehab@...nel.org>,
        <ksloat@...pglobal.com>, <Eugen.Hristev@...rochip.com>
Subject: [PATCH 2/3] media: atmel: atmel-isc: fix INIT_WORK misplacement

From: Eugen Hristev <eugen.hristev@...rochip.com>

In case the completion function failes, unbind will be called
which will call cancel_work for awb_work.
This will trigger a WARN message from the workqueue.
To avoid this, move the INIT_WORK call at the start of the completion
function. This way the work is always initialized, which corresponds
to the 'always canceled' unbind code.

Fixes: 93d4a26c3d ("[media] atmel-isc: add the isc pipeline function")
Signed-off-by: Eugen Hristev <eugen.hristev@...rochip.com>
---
 drivers/media/platform/atmel/atmel-isc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/media/platform/atmel/atmel-isc.c b/drivers/media/platform/atmel/atmel-isc.c
index ea7520a..aef90db 100644
--- a/drivers/media/platform/atmel/atmel-isc.c
+++ b/drivers/media/platform/atmel/atmel-isc.c
@@ -1998,6 +1998,8 @@ static int isc_async_complete(struct v4l2_async_notifier *notifier)
 	struct vb2_queue *q = &isc->vb2_vidq;
 	int ret;
 
+	INIT_WORK(&isc->awb_work, isc_awb_work);
+
 	ret = v4l2_device_register_subdev_nodes(&isc->v4l2_dev);
 	if (ret < 0) {
 		v4l2_err(&isc->v4l2_dev, "Failed to register subdev nodes\n");
@@ -2051,8 +2053,6 @@ static int isc_async_complete(struct v4l2_async_notifier *notifier)
 		return ret;
 	}
 
-	INIT_WORK(&isc->awb_work, isc_awb_work);
-
 	/* Register video device */
 	strscpy(vdev->name, ATMEL_ISC_NAME, sizeof(vdev->name));
 	vdev->release		= video_device_release_empty;
-- 
2.7.4