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From d4b71a388aa58d6d1e46a6207c0acc756c9c0cf0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bj=C3=B8rn=20Mork?= <bjorn@mork.no>
Date: Mon, 16 Jan 2012 15:11:59 +0100
Subject: [PATCH 67/90] USB: cdc-wdm: better allocate a buffer that is at
least as big as we tell the USB core
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
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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 <bjorn@mork.no>
Cc: Oliver Neukum <oliver@neukum.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/class/cdc-wdm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/usb/class/cdc-wdm.c b/drivers/usb/class/cdc-wdm.c
index d2cda26..f0deb9e 100644
--- 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)
--
1.7.9.4
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