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V4L/DVB: gspca - main: Stop the webcam when bandwidth too small

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Signed-off-by: Jean-François Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Jean-François Moine 2010-04-09 06:11:36 -03:00 committed by Mauro Carvalho Chehab
parent 832d0a9130
commit e4dac289f0
1 changed files with 32 additions and 33 deletions
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65
drivers/media/video/gspca/gspca.c
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@ -613,6 +613,37 @@ static void destroy_urbs(struct gspca_dev *gspca_dev)
}
}
static int gspca_set_alt0(struct gspca_dev *gspca_dev)
{
int ret;
if (gspca_dev->alt == 0)
return 0;
ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0);
if (ret < 0)
PDEBUG(D_ERR|D_STREAM, "set alt 0 err %d", ret);
return ret;
}
/* Note: both the queue and the usb locks should be held when calling this */
static void gspca_stream_off(struct gspca_dev *gspca_dev)
{
gspca_dev->streaming = 0;
if (gspca_dev->present) {
if (gspca_dev->sd_desc->stopN)
gspca_dev->sd_desc->stopN(gspca_dev);
destroy_urbs(gspca_dev);
gspca_input_destroy_urb(gspca_dev);
gspca_set_alt0(gspca_dev);
gspca_input_create_urb(gspca_dev);
}
/* always call stop0 to free the subdriver's resources */
if (gspca_dev->sd_desc->stop0)
gspca_dev->sd_desc->stop0(gspca_dev);
PDEBUG(D_STREAM, "stream off OK");
}
/*
* look for an input transfer endpoint in an alternate setting
*/
@ -838,8 +869,7 @@ static int gspca_init_transfer(struct gspca_dev *gspca_dev)
}
if (ret >= 0)
break;
gspca_dev->streaming = 0;
destroy_urbs(gspca_dev);
gspca_stream_off(gspca_dev);
if (ret != -ENOSPC) {
PDEBUG(D_ERR|D_STREAM,
"usb_submit_urb alt %d err %d",
@ -869,37 +899,6 @@ out:
return ret;
}
static int gspca_set_alt0(struct gspca_dev *gspca_dev)
{
int ret;
if (gspca_dev->alt == 0)
return 0;
ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0);
if (ret < 0)
PDEBUG(D_ERR|D_STREAM, "set alt 0 err %d", ret);
return ret;
}
/* Note: both the queue and the usb locks should be held when calling this */
static void gspca_stream_off(struct gspca_dev *gspca_dev)
{
gspca_dev->streaming = 0;
if (gspca_dev->present) {
if (gspca_dev->sd_desc->stopN)
gspca_dev->sd_desc->stopN(gspca_dev);
destroy_urbs(gspca_dev);
gspca_input_destroy_urb(gspca_dev);
gspca_set_alt0(gspca_dev);
gspca_input_create_urb(gspca_dev);
}
/* always call stop0 to free the subdriver's resources */
if (gspca_dev->sd_desc->stop0)
gspca_dev->sd_desc->stop0(gspca_dev);
PDEBUG(D_STREAM, "stream off OK");
}
static void gspca_set_default_mode(struct gspca_dev *gspca_dev)
{
int i;