usb: wusbcore: set the RPIPE wMaxPacketSize value correctly

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>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/usb/wusbcore/wa-rpipe.c b/drivers/usb/wusbcore/wa-rpipe.c
index 1ed068accb76..b48e74cc54d7 100644
--- a/drivers/usb/wusbcore/wa-rpipe.c
+++ b/drivers/usb/wusbcore/wa-rpipe.c
@@ -334,7 +334,10 @@ 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);