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Subject[PATCH 3.11 234/272] usb: wusbcore: set the RPIPE wMaxPacketSize value correctly
Date
3.11.10.1 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Thomas Pugliese <thomas.pugliese@gmail.com>

commit 7b6bc07ab554e929c85d51b3d5b26cf7f12c6a3b upstream.

For isochronous endpoints, set the RPIPE wMaxPacketSize value using
wOverTheAirPacketSize from the endpoint companion descriptor instead of
wMaxPacketSize from the normal endpoint descriptor.

Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
drivers/usb/wusbcore/wa-rpipe.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/wusbcore/wa-rpipe.c b/drivers/usb/wusbcore/wa-rpipe.c
index 9a595c1..fdf731b 100644
--- a/drivers/usb/wusbcore/wa-rpipe.c
+++ b/drivers/usb/wusbcore/wa-rpipe.c
@@ -333,7 +333,10 @@ static int rpipe_aim(struct wa_rpipe *rpipe, struct wahc *wa,
/* FIXME: compute so seg_size > ep->maxpktsize */
rpipe->descr.wBlocks = cpu_to_le16(16); /* given */
/* ep0 maxpktsize is 0x200 (WUSB1.0[4.8.1]) */
- rpipe->descr.wMaxPacketSize = cpu_to_le16(ep->desc.wMaxPacketSize);
+ if (usb_endpoint_xfer_isoc(&ep->desc))
+ rpipe->descr.wMaxPacketSize = epcd->wOverTheAirPacketSize;
+ else
+ rpipe->descr.wMaxPacketSize = ep->desc.wMaxPacketSize;

rpipe->descr.hwa_bMaxBurst = max(min_t(unsigned int,
epcd->bMaxBurst, 16U), 1U);
--
1.8.3.2


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