| From | Greg Kroah-Hartman <> | Subject | [PATCH 3.4 089/134] usb: wusbcore: set the RPIPE wMaxPacketSize value correctly | Date | Wed, 9 Apr 2014 20:23:25 -0700 |
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3.4-stable review patch. If anyone has any objections, please let me know.
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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> [bwh: Backported to 3.2: adjust context] Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Cc: Yang Yingliang <yangyingliang@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/usb/wusbcore/wa-rpipe.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
--- a/drivers/usb/wusbcore/wa-rpipe.c +++ b/drivers/usb/wusbcore/wa-rpipe.c @@ -332,7 +332,10 @@ static int rpipe_aim(struct wa_rpipe *rp /* 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.bHSHubAddress = 0; /* reserved: zero */ rpipe->descr.bHSHubPort = wusb_port_no_to_idx(urb->dev->portnum); /* FIXME: use maximum speed as supported or recommended by device */
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