linux-kernel - [PATCH 4.14 07/59] media: em28xx: Fix misplaced reset of dev->v4l::field

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Date:   Mon, 21 Jan 2019 14:43:32 +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 4.14 07/59] media: em28xx: Fix misplaced reset of dev->v4l::field_count

4.14-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_enable_analog_tuner()
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
@@ -900,8 +900,6 @@ static int em28xx_enable_analog_tuner(st
 	if (!mdev || !v4l2->decoder)
 		return 0;
 
-	dev->v4l2->field_count = 0;
-
 	/*
 	 * This will find the tuner that is connected into the decoder.
 	 * Technically, this is not 100% correct, as the device may be
@@ -1074,6 +1072,8 @@ 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);