linux-kernel - [PATCH 4.4 044/113] usb/gadget: fix gadgetfs aio support.

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Date:   Mon,  5 Sep 2016 18:44:07 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Mathieu Laurendeau <mat.lau@...oste.net>,
        Felipe Balbi <felipe.balbi@...ux.intel.com>
Subject: [PATCH 4.4 044/113] usb/gadget: fix gadgetfs aio support.

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Mathieu Laurendeau <mat.lau@...oste.net>

commit 327b21da884fe1a29f733e41792ddd53e4a30379 upstream.

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")
Signed-off-by: Felipe Balbi <felipe.balbi@...ux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/usb/gadget/legacy/inode.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- 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);