From: Mathieu Laurendeau <mat.lau@laposte.net>
Date: Fri, 15 Jul 2016 12:58:41 +0000 (+0200)
Subject: usb/gadget: fix gadgetfs aio support.
X-Git-Tag: firefly_0821_release~176^2~4^2~31^2~263
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=8fd5243e5f01b6f5ad1457c348d0c9e3353b7745;p=firefly-linux-kernel-4.4.55.git

usb/gadget: fix gadgetfs aio support.

commit 327b21da884fe1a29f733e41792ddd53e4a30379 upstream.

Fix io submissions failing with ENODEV.

Signed-off-by: Mathieu Laurendeau <mat.lau@laposte.net>
Fixes: 7fe3976e0f3a ("gadget: switch ep_io_operations to ->read_iter/->write_iter")
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/usb/gadget/legacy/inode.c b/drivers/usb/gadget/legacy/inode.c
index 55386619a0f1..e57f48f9528f 100644
--- a/drivers/usb/gadget/legacy/inode.c
+++ b/drivers/usb/gadget/legacy/inode.c
@@ -541,7 +541,7 @@ static ssize_t ep_aio(struct kiocb *iocb,
 	 */
 	spin_lock_irq(&epdata->dev->lock);
 	value = -ENODEV;
-	if (unlikely(epdata->ep))
+	if (unlikely(epdata->ep == NULL))
 		goto fail;
 
 	req = usb_ep_alloc_request(epdata->ep, GFP_ATOMIC);