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USB: cdc-wdm: better allocate a buffer that is at least as big as we tell the USB core 

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 <bjorn@mork.no>
Cc: Oliver Neukum <oliver@neukum.org>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Bjørn Mork 2012-01-16 15:11:59 +01:00 committed by Greg Kroah-Hartman
parent 19b85b3b87
commit cafbe85fb0
1 changed files with 1 additions and 1 deletions
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2
drivers/usb/class/cdc-wdm.c
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@ -696,7 +696,7 @@ static int wdm_probe(struct usb_interface *intf, const struct usb_device_id *id)
goto err;
desc->inbuf = usb_alloc_coherent(interface_to_usbdev(intf),
desc->bMaxPacketSize0,
desc->wMaxCommand,
GFP_KERNEL,
&desc->response->transfer_dma);
if (!desc->inbuf)