From 7d716a36c349bad75e13352d11211c3ae556e92f Mon Sep 17 00:00:00 2001 From: =?utf8?q?Jean-Fran=C3=A7ois=20Moine?= Date: Thu, 24 Jun 2010 04:57:12 -0300 Subject: [PATCH] V4L/DVB: gspca - sq930x: Check the USB read errors MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Signed-off-by: Jean-François Moine Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/gspca/sq930x.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/media/video/gspca/sq930x.c b/drivers/media/video/gspca/sq930x.c index 7e4381bbaf28..dd24127d5168 100644 --- a/drivers/media/video/gspca/sq930x.c +++ b/drivers/media/video/gspca/sq930x.c @@ -356,12 +356,20 @@ static const struct cap_s { static void reg_r(struct gspca_dev *gspca_dev, 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), 0x0c, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, value, 0, gspca_dev->usb_buf, len, 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) -- 2.20.1