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Subject[PATCH 6/8] move dropping ->ki_eventfd into iocb_put()
Date
From: Al Viro <viro@zeniv.linux.org.uk>

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/aio.c | 17 ++++++++---------
1 file changed, 8 insertions(+), 9 deletions(-)

diff --git a/fs/aio.c b/fs/aio.c
index 5dd5f35d054c..5837a29e63fe 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -1066,6 +1066,8 @@ static struct kioctx *lookup_ioctx(unsigned long ctx_id)

static inline void iocb_put(struct aio_kiocb *iocb)
{
+ if (iocb->ki_eventfd)
+ eventfd_ctx_put(iocb->ki_eventfd);
if (iocb->ki_filp)
fput(iocb->ki_filp);
percpu_ref_put(&iocb->ki_ctx->reqs);
@@ -1142,10 +1144,8 @@ static void aio_complete(struct aio_kiocb *iocb, long res, long res2)
* eventfd. The eventfd_signal() function is safe to be called
* from IRQ context.
*/
- if (iocb->ki_eventfd) {
+ if (iocb->ki_eventfd)
eventfd_signal(iocb->ki_eventfd, 1);
- eventfd_ctx_put(iocb->ki_eventfd);
- }

/*
* We have to order our ring_info tail store above and test
@@ -1819,18 +1819,19 @@ static int __io_submit_one(struct kioctx *ctx, const struct iocb *iocb,
goto out_put_req;

if (iocb->aio_flags & IOCB_FLAG_RESFD) {
+ struct eventfd_ctx *eventfd;
/*
* If the IOCB_FLAG_RESFD flag of aio_flags is set, get an
* instance of the file* now. The file descriptor must be
* an eventfd() fd, and will be signaled for each completed
* event using the eventfd_signal() function.
*/
- req->ki_eventfd = eventfd_ctx_fdget((int) iocb->aio_resfd);
- if (IS_ERR(req->ki_eventfd)) {
- ret = PTR_ERR(req->ki_eventfd);
- req->ki_eventfd = NULL;
+ eventfd = eventfd_ctx_fdget((int) iocb->aio_resfd);
+ if (IS_ERR(eventfd)) {
+ ret = PTR_ERR(eventfd);
goto out_put_req;
}
+ req->ki_eventfd = eventfd;
}

ret = put_user(KIOCB_KEY, &user_iocb->aio_key);
@@ -1881,8 +1882,6 @@ static int __io_submit_one(struct kioctx *ctx, const struct iocb *iocb,
goto out_put_req;
return 0;
out_put_req:
- if (req->ki_eventfd)
- eventfd_ctx_put(req->ki_eventfd);
iocb_put(req);
out_put_reqs_available:
put_reqs_available(ctx, 1);
--
2.11.0
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