[67/89] USB: cdc-wdm: better allocate a buffer that is at least as big as we tell the USB core

[Greg KH]

3.2-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Bjørn Mork <bj...@mork.no>

commit 655e247daf52b202a6c2d0f8a06dd2051e756ce4 upstream.

As it turns out, there was a mismatch between the allocated inbuf size
(desc->bMaxPacketSize0, typically something like 64) and the length we
specified in the URB (desc->wMaxCommand, typically something like 2048)

Signed-off-by: Bjørn Mork <bj...@mork.no>
Cc: Oliver Neukum <oli...@neukum.org>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 drivers/usb/class/cdc-wdm.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/usb/class/cdc-wdm.c
+++ b/drivers/usb/class/cdc-wdm.c
@@ -723,7 +723,7 @@ next_desc:
                goto err;
 
        desc->inbuf = usb_alloc_coherent(interface_to_usbdev(intf),
-                                        desc->bMaxPacketSize0,
+                                        desc->wMaxCommand,
                                         GFP_KERNEL,
                                         &desc->response->transfer_dma);
        if (!desc->inbuf)


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