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

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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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Chuansheng Liu 2014-03-04 15:34:57 +08:00 • committed by Felipe Balbi

parent 8bebbe8dc6

commit cfe919b53b

1 changed files with 15 additions and 13 deletions

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28

drivers/usb/gadget/f_fs.c

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