Commit 655e247d authored Jan 16, 2012 by Bjørn Mork Committed by Greg Kroah-Hartman Jan 24, 2012

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>

parent 62aaf24d

drivers/usb/class/cdc-wdm.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -723,7 +723,7 @@ 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)