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

Greg Kroah-Hartman
2016-09-05T17:25:26Z

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

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>

---
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);