From: Bin Liu <b-liu@ti.com>
Date: Tue, 12 Aug 2014 19:18:43 +0000 (-0500)
Subject: usb: musb: cppi41: fix not transmitting zero length packet issue
X-Git-Tag: fixes-for-v3.18-merge-window~137^2~23^2~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9267edaf8cd7b0ef2cd7785c677fe792c077b6ab;p=pandora-kernel.git

usb: musb: cppi41: fix not transmitting zero length packet issue

CPPI TX does not transmit ZLP for TX transfers which
- transfer size is multiple of EP packet size,
- and URB_ZERO_PACKET is set in urb->transfer_flags.

The fix is transmitting the ZLP using PIO mode after the CPPI TX is
done.

Validated using the following usbtest write case in MUSB host mode.

  # testusb -t1 -c1

Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
---

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