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-rw-r--r--drivers/media/video/gspca/ov534.c21
1 files changed, 16 insertions, 5 deletions
diff --git a/drivers/media/video/gspca/ov534.c b/drivers/media/video/gspca/ov534.c
index a837f2942a8c..04da22802736 100644
--- a/drivers/media/video/gspca/ov534.c
+++ b/drivers/media/video/gspca/ov534.c
@@ -479,6 +479,9 @@ static void ov534_reg_write(struct gspca_dev *gspca_dev, u16 reg, u8 val)
struct usb_device *udev = gspca_dev->dev;
int ret;
+ if (gspca_dev->usb_err < 0)
+ return;
+
PDEBUG(D_USBO, "SET 01 0000 %04x %02x", reg, val);
gspca_dev->usb_buf[0] = val;
ret = usb_control_msg(udev,
@@ -486,8 +489,10 @@ static void ov534_reg_write(struct gspca_dev *gspca_dev, u16 reg, u8 val)
0x01,
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
0x00, reg, gspca_dev->usb_buf, 1, CTRL_TIMEOUT);
- if (ret < 0)
+ if (ret < 0) {
err("write failed %d", ret);
+ gspca_dev->usb_err = ret;
+ }
}
static u8 ov534_reg_read(struct gspca_dev *gspca_dev, u16 reg)
@@ -495,14 +500,18 @@ static u8 ov534_reg_read(struct gspca_dev *gspca_dev, u16 reg)
struct usb_device *udev = gspca_dev->dev;
int ret;
+ if (gspca_dev->usb_err < 0)
+ return 0;
ret = usb_control_msg(udev,
usb_rcvctrlpipe(udev, 0),
0x01,
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
0x00, reg, gspca_dev->usb_buf, 1, CTRL_TIMEOUT);
PDEBUG(D_USBI, "GET 01 0000 %04x %02x", reg, gspca_dev->usb_buf[0]);
- if (ret < 0)
+ if (ret < 0) {
err("read failed %d", ret);
+ gspca_dev->usb_err = ret;
+ }
return gspca_dev->usb_buf[0];
}
@@ -563,8 +572,10 @@ static void sccb_reg_write(struct gspca_dev *gspca_dev, u8 reg, u8 val)
ov534_reg_write(gspca_dev, OV534_REG_WRITE, val);
ov534_reg_write(gspca_dev, OV534_REG_OPERATION, OV534_OP_WRITE_3);
- if (!sccb_check_status(gspca_dev))
+ if (!sccb_check_status(gspca_dev)) {
err("sccb_reg_write failed");
+ gspca_dev->usb_err = -EIO;
+ }
}
static u8 sccb_reg_read(struct gspca_dev *gspca_dev, u16 reg)
@@ -885,7 +896,7 @@ static int sd_init(struct gspca_dev *gspca_dev)
ov534_set_led(gspca_dev, 0);
set_frame_rate(gspca_dev);
- return 0;
+ return gspca_dev->usb_err;
}
static int sd_start(struct gspca_dev *gspca_dev)
@@ -920,7 +931,7 @@ static int sd_start(struct gspca_dev *gspca_dev)
ov534_set_led(gspca_dev, 1);
ov534_reg_write(gspca_dev, 0xe0, 0x00);
- return 0;
+ return gspca_dev->usb_err;
}
static void sd_stopN(struct gspca_dev *gspca_dev)