[PATCH 7/8] deal with get_reqs_available() in aio_get_req() itself

[Al Viro <viro@ZenIV.linux.org.uk>]

From: Al Viro <viro@zeniv.linux.org.uk>

simplifies the caller

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 fs/aio.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/fs/aio.c b/fs/aio.c
index 5837a29e63fe..af51b1360305 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -1029,6 +1029,11 @@ static inline struct aio_kiocb *aio_get_req(struct kioctx *ctx)
 	if (unlikely(!req))
 		return NULL;
 
+	if (unlikely(!get_reqs_available(ctx))) {
+		kfree(req);
+		return NULL;
+	}
+
 	percpu_ref_get(&ctx->reqs);
 	req->ki_ctx = ctx;
 	INIT_LIST_HEAD(&req->ki_list);
@@ -1805,13 +1810,9 @@ static int __io_submit_one(struct kioctx *ctx, const struct iocb *iocb,
 		return -EINVAL;
 	}
 
-	if (!get_reqs_available(ctx))
-		return -EAGAIN;
-
-	ret = -EAGAIN;
 	req = aio_get_req(ctx);
 	if (unlikely(!req))
-		goto out_put_reqs_available;
+		return -EAGAIN;
 
 	req->ki_filp = fget(iocb->aio_fildes);
 	ret = -EBADF;
@@ -1883,7 +1884,6 @@ static int __io_submit_one(struct kioctx *ctx, const struct iocb *iocb,
 	return 0;
 out_put_req:
 	iocb_put(req);
-out_put_reqs_available:
 	put_reqs_available(ctx, 1);
 	return ret;
 }
-- 
2.11.0