media: usb: gspca: add a missed check for goto_low_power

The fix checks if goto_low_power() fails, and if so, issues an error
message.

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

diff --git a/drivers/media/usb/gspca/cpia1.c b/drivers/media/usb/gspca/cpia1.c
index 23fbda5..7c817a4 100644 (file)
--- a/drivers/media/usb/gspca/cpia1.c
+++ b/drivers/media/usb/gspca/cpia1.c
@@ -1434,6 +1434,7 @@ static int sd_config(struct gspca_dev *gspca_dev,
 {
        struct sd *sd = (struct sd *) gspca_dev;
        struct cam *cam;
+       int ret;
 
        sd->mainsFreq = FREQ_DEF == V4L2_CID_POWER_LINE_FREQUENCY_60HZ;
        reset_camera_params(gspca_dev);
@@ -1445,7 +1446,10 @@ static int sd_config(struct gspca_dev *gspca_dev,
        cam->cam_mode = mode;
        cam->nmodes = ARRAY_SIZE(mode);
 
-       goto_low_power(gspca_dev);
+       ret = goto_low_power(gspca_dev);
+       if (ret)
+               gspca_err(gspca_dev, "Cannot go to low power mode: %d\n",
+                         ret);
        /* Check the firmware version. */
        sd->params.version.firmwareVersion = 0;
        get_version_information(gspca_dev);