diff options
Diffstat (limited to 'drivers/input/touchscreen/usbtouchscreen.c')
| -rw-r--r-- | drivers/input/touchscreen/usbtouchscreen.c | 31 |
1 files changed, 19 insertions, 12 deletions
diff --git a/drivers/input/touchscreen/usbtouchscreen.c b/drivers/input/touchscreen/usbtouchscreen.c index 63f9664a066..3a0a8ca5707 100644 --- a/drivers/input/touchscreen/usbtouchscreen.c +++ b/drivers/input/touchscreen/usbtouchscreen.c @@ -396,9 +396,12 @@ static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt) static int dmc_tsc10_init(struct usbtouch_usb *usbtouch) { struct usb_device *dev = usbtouch->udev; - int ret; - unsigned char buf[2]; + int ret = -ENOMEM; + unsigned char *buf; + buf = kmalloc(2, GFP_KERNEL); + if (!buf) + goto err_nobuf; /* reset */ buf[0] = buf[1] = 0xFF; ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0), @@ -406,9 +409,11 @@ static int dmc_tsc10_init(struct usbtouch_usb *usbtouch) USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 0, 0, buf, 2, USB_CTRL_SET_TIMEOUT); if (ret < 0) - return ret; - if (buf[0] != 0x06 || buf[1] != 0x00) - return -ENODEV; + goto err_out; + if (buf[0] != 0x06 || buf[1] != 0x00) { + ret = -ENODEV; + goto err_out; + } /* set coordinate output rate */ buf[0] = buf[1] = 0xFF; @@ -417,20 +422,22 @@ static int dmc_tsc10_init(struct usbtouch_usb *usbtouch) USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT); if (ret < 0) - return ret; + goto err_out; if ((buf[0] != 0x06 || buf[1] != 0x00) && - (buf[0] != 0x15 || buf[1] != 0x01)) - return -ENODEV; + (buf[0] != 0x15 || buf[1] != 0x01)) { + ret = -ENODEV; + goto err_out; + } /* start sending data */ ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0), TSC10_CMD_DATA1, USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT); - if (ret < 0) - return ret; - - return 0; +err_out: + kfree(buf); +err_nobuf: + return ret; } |