From: Pratyush Anand <pratyush.anand@st.com>
Date: Fri, 10 Aug 2012 08:12:16 +0000 (+0530)
Subject: usb: dwc3: ep0: correct cache sync issue in case of ep0_bounced
X-Git-Tag: v3.6-rc6~19^2~5^2~11
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0416e494ce7dc84e2719bc9fb7daecb330476074;p=pandora-kernel.git

usb: dwc3: ep0: correct cache sync issue in case of ep0_bounced

In case of ep0 out, if length is not aligned to maxpacket size then we use
dwc->ep_bounce_addr for dma transfer and not request->dma. Since, we have
alreday done memcpy from dwc->ep0_bounce to request->buf, so we do not need to
issue cache sync function. In fact, cache sync function will bring wrong data
in request->buf from request->dma in this scenario.

So, cache sync function must not be executed in case of ep0 bounced.

Cc: <stable@vger.kernel.org> # v3.4 v3.5
Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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