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usb/config: use proper endian access for wMaxPacketSize 

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 <bigeasy@linutronix.de>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Acked-by: Matt Evans <matt@ozlabs.org>
Cc: stable@kernel.org
This commit is contained in:
Sebastian Andrzej Siewior 2011-07-29 11:05:45 +02:00 committed by Sarah Sharp
parent 6768458b17
commit 7de7c7d2cb
1 changed files with 6 additions and 5 deletions
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11
drivers/usb/core/config.c
View File

@ -123,10 +123,11 @@ static void usb_parse_ss_endpoint_companion(struct device *ddev, int cfgno,
}
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_companion(struct device *ddev, int cfgno,
"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);
}
}