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V4L/DVB: gspca - sq930x: Check the USB read errors

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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
2010-06-24 04:57:12 -03:00
committed by Mauro Carvalho Chehab
parent a1317135d1
commit 7d716a36c3
1 changed files with 9 additions and 1 deletions
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10
drivers/media/video/gspca/sq930x.c
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@@ -356,12 +356,20 @@ static const struct cap_s {
static void reg_r(struct gspca_dev *gspca_dev, static void reg_r(struct gspca_dev *gspca_dev,
u16 value, int len) u16 value, int len)
{ {
usb_control_msg(gspca_dev->dev, int ret;
if (gspca_dev->usb_err < 0)
return;
ret = usb_control_msg(gspca_dev->dev,
usb_rcvctrlpipe(gspca_dev->dev, 0), usb_rcvctrlpipe(gspca_dev->dev, 0),
0x0c, 0x0c,
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
value, 0, gspca_dev->usb_buf, len, value, 0, gspca_dev->usb_buf, len,
500); 500);
if (ret < 0) {
PDEBUG(D_ERR, "reg_r %04x failed %d", value, ret);
gspca_dev->usb_err = ret;
}
} }
static void reg_w(struct gspca_dev *gspca_dev, u16 value, u16 index) static void reg_w(struct gspca_dev *gspca_dev, u16 value, u16 index)