From: Jean-François Moine Date: Fri, 9 Apr 2010 09:11:36 +0000 (-0300) Subject: V4L/DVB: gspca - main: Stop the webcam when bandwidth too small X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=e4dac289f01da80d7966a123bc1ea97be199ba4f;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git V4L/DVB: gspca - main: Stop the webcam when bandwidth too small Signed-off-by: Jean-François Moine Signed-off-by: Mauro Carvalho Chehab --- diff --git a/drivers/media/video/gspca/gspca.c b/drivers/media/video/gspca/gspca.c index 9c9d7ea7e626..e8d08f887957 100644 --- a/drivers/media/video/gspca/gspca.c +++ b/drivers/media/video/gspca/gspca.c @@ -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;