[media] gspca: Update / fix various comments wrt workqueue usb_lock usage

[~andy/linux] / drivers / media / usb / gspca / sn9c20x.c

diff --git a/drivers/media/usb/gspca/sn9c20x.c b/drivers/media/usb/gspca/sn9c20x.c
index b9c6f17eabb245fde118e3b198f163782d92a7bc..41f769fe340c9f1a6a9f01ef7a84e4e9feb323b1 100644 (file)
--- a/drivers/media/usb/gspca/sn9c20x.c
+++ b/drivers/media/usb/gspca/sn9c20x.c
@@ -2197,8 +2197,10 @@ static void qual_upd(struct work_struct *work)
        struct gspca_dev *gspca_dev = &sd->gspca_dev;
        s32 qual = v4l2_ctrl_g_ctrl(sd->jpegqual);
 
+       /* To protect gspca_dev->usb_buf and gspca_dev->usb_err */
        mutex_lock(&gspca_dev->usb_lock);
        PDEBUG(D_STREAM, "qual_upd %d%%", qual);
+       gspca_dev->usb_err = 0;
        set_quality(gspca_dev, qual);
        mutex_unlock(&gspca_dev->usb_lock);
 }