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io_uring: import_single_range() returns 0/-ERROR

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Unlike the other core import helpers, import_single_range() returns 0 on
success, not the length imported. This means that links that depend on
the result of non-vec based IORING_OP_{READ,WRITE} that were added for
5.5 get errored when they should not be.

Fixes: 3a6820f2bb8a ("io_uring: add non-vectored read/write commands")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2020-02-25 17:48:55 -07:00
parent 2a44f46781
commit 3a9015988b
1 changed files with 1 additions and 1 deletions
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2
fs/io_uring.c
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@ -2075,7 +2075,7 @@ static ssize_t io_import_iovec(int rw, struct io_kiocb *req,
ssize_t ret; ssize_t ret;
ret = import_single_range(rw, buf, sqe_len, *iovec, iter); ret = import_single_range(rw, buf, sqe_len, *iovec, iter);
*iovec = NULL; *iovec = NULL;
return ret; return ret < 0 ? ret : sqe_len;
} }
if (req->io) { if (req->io) {