diff options
Diffstat (limited to 'linux/drivers/media/video/em28xx/em28xx-core.c')
| -rw-r--r-- | linux/drivers/media/video/em28xx/em28xx-core.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/linux/drivers/media/video/em28xx/em28xx-core.c b/linux/drivers/media/video/em28xx/em28xx-core.c index ef6830cd5..490afcba0 100644 --- a/linux/drivers/media/video/em28xx/em28xx-core.c +++ b/linux/drivers/media/video/em28xx/em28xx-core.c @@ -76,18 +76,22 @@ int em28xx_read_reg_req_len(struct em28xx *dev, u8 req, u16 reg, em28xx_regdbg("req=%02x, reg=%02x ", req, reg); + mutex_lock(&dev->ctrl_urb_lock); ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0), req, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 0x0000, reg, dev->urb_buf, len, HZ); if (ret < 0) { if (reg_debug) printk(" failed!\n"); + mutex_unlock(&dev->ctrl_urb_lock); return ret; } if (len) memcpy(buf, dev->urb_buf, len); + mutex_unlock(&dev->ctrl_urb_lock); + if (reg_debug) { printk("%02x values: ", ret); for (byte = 0; byte < len; byte++) @@ -112,16 +116,18 @@ int em28xx_read_reg_req(struct em28xx *dev, u8 req, u16 reg) em28xx_regdbg("req=%02x, reg=%02x:", req, reg); + mutex_lock(&dev->ctrl_urb_lock); ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0), req, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 0x0000, reg, dev->urb_buf, 1, HZ); + val = dev->urb_buf[0]; + mutex_unlock(&dev->ctrl_urb_lock); + if (ret < 0) { printk(" failed!\n"); return ret; } - val = dev->urb_buf[0]; - if (reg_debug) printk("%02x\n", (unsigned char) val); @@ -156,10 +162,12 @@ int em28xx_write_regs_req(struct em28xx *dev, u8 req, u16 reg, char *buf, printk("\n"); } + mutex_lock(&dev->ctrl_urb_lock); memcpy(dev->urb_buf, buf, len); ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), req, USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 0x0000, reg, dev->urb_buf, len, HZ); + mutex_unlock(&dev->ctrl_urb_lock); if (dev->wait_after_write) msleep(dev->wait_after_write); |