From: Chuansheng Liu <chuansheng.liu@intel.com>
Date: Tue, 4 Mar 2014 07:34:57 +0000 (+0800)
Subject: usb: gadget: return the right length in ffs_epfile_io()
X-Git-Tag: v3.15-rc1~137^2~25^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cfe919b53b807ab32e89e1c662c6d242948449bd;p=pandora-kernel.git

usb: gadget: return the right length in ffs_epfile_io()

When the request length is aligned to maxpacketsize, sometimes
the return length ret > the user space requested len.

At that time, we will use min_t(size_t, ret, len) to limit the
size in case of user data buffer overflow.

But we need return the min_t(size_t, ret, len) to tell the user
space rightly also.

[ balbi@ti.com: also fix comment's indentation ]

Acked-by: Michal Nazarewicz <mina86@mina86.com>
Reviewed-by: David Cohen <david.a.cohen@linux.intel.com>
Signed-off-by: Chuansheng Liu <chuansheng.liu@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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