This is a note to let you know that I've just added the patch titled
usb/config: use proper endian access for wMaxPacketSize
to the 3.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
usb-config-use-proper-endian-access-for-wmaxpacketsize.patch
and it can be found in the queue-3.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 7de7c7d2cb49900e0b967be871bf695c7d6135c9 Mon Sep 17 00:00:00 2001
From: Sebastian Andrzej Siewior <[email protected]>
Date: Fri, 29 Jul 2011 11:05:45 +0200
Subject: usb/config: use proper endian access for wMaxPacketSize
From: Sebastian Andrzej Siewior <[email protected]>
commit 7de7c7d2cb49900e0b967be871bf695c7d6135c9 upstream.
wMaxPacketSize is __le16 and should be accessed as such. Also fix the
wBytesPerInterval assignment while here.
v2: also fix the wBytesPerInterval assigment, noticed by Matt Evans
This patch should be backported to the 3.0 kernel.
Signed-off-by: Sebastian Andrzej Siewior <[email protected]>
Signed-off-by: Sarah Sharp <[email protected]>
Acked-by: Matt Evans <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/usb/core/config.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
--- a/drivers/usb/core/config.c
+++ b/drivers/usb/core/config.c
@@ -123,10 +123,11 @@ static void usb_parse_ss_endpoint_compan
}
if (usb_endpoint_xfer_isoc(&ep->desc))
- max_tx = ep->desc.wMaxPacketSize * (desc->bMaxBurst + 1) *
- (desc->bmAttributes + 1);
+ max_tx = (desc->bMaxBurst + 1) * (desc->bmAttributes + 1) *
+ le16_to_cpu(ep->desc.wMaxPacketSize);
else if (usb_endpoint_xfer_int(&ep->desc))
- max_tx = ep->desc.wMaxPacketSize * (desc->bMaxBurst + 1);
+ max_tx = le16_to_cpu(ep->desc.wMaxPacketSize) *
+ (desc->bMaxBurst + 1);
else
max_tx = 999999;
if (le16_to_cpu(desc->wBytesPerInterval) > max_tx) {
@@ -134,10 +135,10 @@ static void usb_parse_ss_endpoint_compan
"config %d interface %d altsetting %d ep %d: "
"setting to %d\n",
usb_endpoint_xfer_isoc(&ep->desc) ? "Isoc" :
"Int",
- desc->wBytesPerInterval,
+ le16_to_cpu(desc->wBytesPerInterval),
cfgno, inum, asnum, ep->desc.bEndpointAddress,
max_tx);
- ep->ss_ep_comp.wBytesPerInterval = max_tx;
+ ep->ss_ep_comp.wBytesPerInterval = cpu_to_le16(max_tx);
}
}
Patches currently in stable-queue which might be from [email protected] are
queue-3.0/usb-config-use-proper-endian-access-for-wmaxpacketsize.patch
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