usb: gadget: return the right length in ffs_epfile_io()
authorChuansheng Liu <chuansheng.liu@intel.com>
Tue, 4 Mar 2014 07:34:57 +0000 (15:34 +0800)
committerFelipe Balbi <balbi@ti.com>
Fri, 7 Mar 2014 16:03:25 +0000 (10:03 -0600)
commitcfe919b53b807ab32e89e1c662c6d242948449bd
treedee085b60f958e3ca72ce924ce2a46ac246a82a5
parent8bebbe8dc6145303db05964fb09657aac2a7e909
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>
drivers/usb/gadget/f_fs.c