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Subject[PATCH 7/8] deal with get_reqs_available() in aio_get_req() itself
Date
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 595c19965a8b..66ca52c57cca 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -1033,6 +1033,11 @@ 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);
@@ -1796,13 +1801,9 @@ 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;
@@ -1877,7 +1878,6 @@ static int __io_submit_one(struct kioctx *ctx, const struct iocb *iocb,

out_put_req:
iocb_destroy(req);
-out_put_reqs_available:
put_reqs_available(ctx, 1);
return ret;
}
--
2.11.0
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