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io_uring: simplify io_rw_prep_async()

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Don't touch iter->iov and iov in between __io_import_iovec() and
io_req_map_rw(), the former function aleady sets it correctly, because it
creates one more case with NULL'ed iov to consider in io_req_map_rw().

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2020-09-06 00:45:45 +03:00 committed by Jens Axboe
parent 9055420072
commit f4bff104ff
1 changed files with 2 additions and 4 deletions
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6
fs/io_uring.c
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@ -3065,16 +3065,14 @@ static inline int io_rw_prep_async(struct io_kiocb *req, int rw,
bool force_nonblock)
{
struct io_async_rw *iorw = &req->io->rw;
struct iovec *iov;
struct iovec *iov = iorw->fast_iov;
ssize_t ret;
iorw->iter.iov = iov = iorw->fast_iov;
ret = __io_import_iovec(rw, req, &iov, &iorw->iter, !force_nonblock);
if (unlikely(ret < 0))
return ret;
iorw->iter.iov = iov;
io_req_map_rw(req, iorw->iter.iov, iorw->fast_iov, &iorw->iter);
io_req_map_rw(req, iov, iorw->fast_iov, &iorw->iter);
return 0;
}