linux-kernel - [PATCH 4.9 07/51] media: em28xx: Fix misplaced reset of dev->v4l::field

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Message-Id: <20190121122454.154518807@linuxfoundation.org>
Date:   Mon, 21 Jan 2019 14:44:03 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        "stable@...r.kernel.org, Mauro Carvalho Chehab" 
        <mchehab+samsung@...nel.org>, Ben Hutchings <ben@...adent.org.uk>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>
Subject: [PATCH 4.9 07/51] media: em28xx: Fix misplaced reset of dev->v4l::field_count

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Ben Hutchings <ben@...adent.org.uk>

The backport of commit afeaade90db4 "media: em28xx: make
v4l2-compliance happier by starting sequence on zero" added a
reset on em28xx_v4l2::field_count to em28xx_ctrl_notify(),
but it should be done in em28xx_start_analog_streaming().

Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
Cc: Mauro Carvalho Chehab <mchehab+samsung@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/media/usb/em28xx/em28xx-video.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/media/usb/em28xx/em28xx-video.c
+++ b/drivers/media/usb/em28xx/em28xx-video.c
@@ -1062,6 +1062,8 @@ int em28xx_start_analog_streaming(struct
 
 	em28xx_videodbg("%s\n", __func__);
 
+	dev->v4l2->field_count = 0;
+
 	/* Make sure streaming is not already in progress for this type
 	   of filehandle (e.g. video, vbi) */
 	rc = res_get(dev, vq->type);
@@ -1290,8 +1292,6 @@ static void em28xx_ctrl_notify(struct v4
 {
 	struct em28xx *dev = priv;
 
-	dev->v4l2->field_count = 0;
-
 	/*
 	 * In the case of non-AC97 volume controls, we still need
 	 * to do some setups at em28xx, in order to mute/unmute