Merge tag 'for-linus-20170825' of git://git.infradead.org/linux-mtd

[mirror_ubuntu-artful-kernel.git] / drivers / net / irda / mcs7780.c

diff --git a/drivers/net/irda/mcs7780.c b/drivers/net/irda/mcs7780.c
index 6f6ed75b63c97e7eaa2e49e7fcb385ca965f1ca5..765de3bedb8817d018b4f6143b3195c581cc3834 100644 (file)
--- a/drivers/net/irda/mcs7780.c
+++ b/drivers/net/irda/mcs7780.c
@@ -141,9 +141,19 @@ static int mcs_set_reg(struct mcs_cb *mcs, __u16 reg, __u16 val)
 static int mcs_get_reg(struct mcs_cb *mcs, __u16 reg, __u16 * val)
 {
        struct usb_device *dev = mcs->usbdev;
-       int ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
-                                 MCS_RD_RTYPE, 0, reg, val, 2,
-                                 msecs_to_jiffies(MCS_CTRL_TIMEOUT));
+       void *dmabuf;
+       int ret;
+
+       dmabuf = kmalloc(sizeof(__u16), GFP_KERNEL);
+       if (!dmabuf)
+               return -ENOMEM;
+
+       ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
+                             MCS_RD_RTYPE, 0, reg, dmabuf, 2,
+                             msecs_to_jiffies(MCS_CTRL_TIMEOUT));
+
+       memcpy(val, dmabuf, sizeof(__u16));
+       kfree(dmabuf);
 
        return ret;
 }