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[media] gspca - ov534: Propagate errors to higher level 

Signed-off-by: Jean-François Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Jean-François Moine 2011-01-13 05:58:04 -03:00 committed by Mauro Carvalho Chehab
parent ddffa49e25
commit 14b67c2969
1 changed files with 16 additions and 5 deletions
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21
drivers/media/video/gspca/ov534.c
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@ -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)