diff options
Diffstat (limited to 'drivers/media/usb/gspca/sunplus.c')
| -rw-r--r-- | drivers/media/usb/gspca/sunplus.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/media/usb/gspca/sunplus.c b/drivers/media/usb/gspca/sunplus.c index f4a4222f0d2e..971dee0a56da 100644 --- a/drivers/media/usb/gspca/sunplus.c +++ b/drivers/media/usb/gspca/sunplus.c @@ -242,6 +242,10 @@ static void reg_r(struct gspca_dev *gspca_dev, gspca_err(gspca_dev, "reg_r: buffer overflow\n"); return; } + if (len == 0) { + gspca_err(gspca_dev, "reg_r: zero-length read\n"); + return; + } if (gspca_dev->usb_err < 0) return; ret = usb_control_msg(gspca_dev->dev, @@ -250,7 +254,7 @@ static void reg_r(struct gspca_dev *gspca_dev, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 0, /* value */ index, - len ? gspca_dev->usb_buf : NULL, len, + gspca_dev->usb_buf, len, 500); if (ret < 0) { pr_err("reg_r err %d\n", ret); @@ -551,7 +555,7 @@ static void init_ctl_reg(struct gspca_dev *gspca_dev) case BRIDGE_SPCA504: case BRIDGE_SPCA504C: pollreg = 0; - /* fall through */ + fallthrough; default: /* case BRIDGE_SPCA533: */ /* case BRIDGE_SPCA504B: */ @@ -634,7 +638,7 @@ static int sd_init(struct gspca_dev *gspca_dev) reg_w_riv(gspca_dev, 0x00, 0x2000, 0x00); reg_w_riv(gspca_dev, 0x00, 0x2301, 0x13); reg_w_riv(gspca_dev, 0x00, 0x2306, 0x00); - /* fall through */ + fallthrough; case BRIDGE_SPCA533: spca504B_PollingDataReady(gspca_dev); spca50x_GetFirmware(gspca_dev); @@ -727,7 +731,7 @@ static int sd_start(struct gspca_dev *gspca_dev) case MegaImageVI: reg_w_riv(gspca_dev, 0xf0, 0, 0); spca504B_WaitCmdStatus(gspca_dev); - reg_r(gspca_dev, 0xf0, 4, 0); + reg_w_riv(gspca_dev, 0xf0, 4, 0); spca504B_WaitCmdStatus(gspca_dev); break; default: |