linux-kernel - [PATCH] usb/gadget: fix gadgetfs aio support.

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Message-Id: <1468587521-16520-1-git-send-email-mat.lau@laposte.net>
Date:	Fri, 15 Jul 2016 14:58:41 +0200
From:	Mathieu Laurendeau <mat.lau@...oste.net>
To:	balbi@...nel.org
Cc:	gregkh@...uxfoundation.org, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: [PATCH] usb/gadget: fix gadgetfs aio support.

Fix io submissions failing with ENODEV.

Signed-off-by: Mathieu Laurendeau <mat.lau@...oste.net>
Fixes: 7fe3976e0f3a ("gadget: switch ep_io_operations to ->read_iter/->write_iter")
---
 drivers/usb/gadget/legacy/inode.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/gadget/legacy/inode.c b/drivers/usb/gadget/legacy/inode.c
index aa3707b..be64798 100644
--- a/drivers/usb/gadget/legacy/inode.c
+++ b/drivers/usb/gadget/legacy/inode.c
@@ -542,7 +542,7 @@ 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);
-- 
2.7.4