V4L/DVB (11570): patch: s2255drv: fix race condition on set mode

set_modeready flag must be set before command sent to USB in
s2255_write_config.

Signed-off-by: Dean Anderson <dean@sensoray.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/video/s2255drv.c b/drivers/media/video/s2255drv.c
index 5202cadb2aaec3f114c33fca69a58d34b756591c..30f4698be90a5a9555426b2732f7dfc268256fbb 100644 (file)
--- a/drivers/media/video/s2255drv.c
+++ b/drivers/media/video/s2255drv.c
@@ -1237,6 +1237,7 @@ static int s2255_set_mode(struct s2255_dev *dev, unsigned long chn,
        buffer[1] = (u32) chn_rev;
        buffer[2] = CMD_SET_MODE;
        memcpy(&buffer[3], &dev->mode[chn], sizeof(struct s2255_mode));
+       dev->setmode_ready[chn] = 0;
        res = s2255_write_config(dev->udev, (unsigned char *)buffer, 512);
        if (debug)
                dump_verify_mode(dev, mode);
@@ -1245,7 +1246,6 @@ static int s2255_set_mode(struct s2255_dev *dev, unsigned long chn,
 
        /* wait at least 3 frames before continuing */
        if (mode->restart) {
-               dev->setmode_ready[chn] = 0;
                wait_event_timeout(dev->wait_setmode[chn],
                                   (dev->setmode_ready[chn] != 0),
                                   msecs_to_jiffies(S2255_SETMODE_TIMEOUT));