From: Robert Baldyga <r.baldyga@samsung.com>
Date: Mon, 10 Feb 2014 09:42:43 +0000 (+0100)
Subject: usb: gadget: f_fs: add poll for endpoint 0
X-Git-Tag: v3.15-rc1~137^2~25^2~58
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=23de91e970a410a30b5927b9a749ed1dfd914140;p=pandora-kernel.git

usb: gadget: f_fs: add poll for endpoint 0

This patch adds poll function for file representing ep0.

Ability of read from or write to ep0 file is related with actual state of ffs:
- When desctiptors or strings are not written yet, POLLOUT flag is set.
- If there is any event to read, POLLIN flag is set.
- If setup request was read, POLLIN and POLLOUT flag is set, to allow
  send response (by performing I/O operation consistent with setup request
  direction) or set stall (by performing I/O operation opposite  setup
  request direction).

Signed-off-by: Robert Baldyga <r.baldyga@samsung.com>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
---

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