aio: clear IOCB_HIPRI

commit 154989e45fd8de9bfb52bbd6e5ea763e437e54c5 upstream.

No one is going to poll for aio (yet), so we must clear the HIPRI
flag, as we would otherwise send it down the poll queues, where no
one will be polling for completions.
Signed-off-by: NChristoph Hellwig <hch@lst.de>

IOCB_HIPRI, not RWF_HIPRI.
Reviewed-by: NJohannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: NJens Axboe <axboe@kernel.dk>
Cc: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

fs/aio.c

@@ -1438,8 +1438,7 @@ static int aio_prep_rw(struct kiocb *req, struct iocb *iocb)
 		ret = ioprio_check_cap(iocb->aio_reqprio);
 		if (ret) {
 			pr_debug("aio ioprio check cap error: %d\n", ret);
-			fput(req->ki_filp);
-			return ret;
+			goto out_fput;
 		}
 
 		req->ki_ioprio = iocb->aio_reqprio;
@@ -1448,7 +1447,13 @@ static int aio_prep_rw(struct kiocb *req, struct iocb *iocb)
 
 	ret = kiocb_set_rw_flags(req, iocb->aio_rw_flags);
 	if (unlikely(ret))
-		fput(req->ki_filp);
+		goto out_fput;
+
+	req->ki_flags &= ~IOCB_HIPRI; /* no one is going to poll for this I/O */
+	return 0;
+
+out_fput:
+	fput(req->ki_filp);
 	return ret;
 }