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
diff --git a/drivers/usb/core/config.c b/drivers/usb/core/config.c
index c962608..26678ca 100644
--- a/drivers/usb/core/config.c
+++ b/drivers/usb/core/config.c
@@ -123,10 +123,11 @@
}
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 @@
"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);
}
}