Commit f274495a authored by Jens Axboe's avatar Jens Axboe
Browse files

io_uring/kbuf: return correct iovec count from classic buffer peek 



io_provided_buffers_select() returns 0 to indicate success, but it should
be returning 1 to indicate that 1 vec was mapped. This causes peeking
to fail with classic provided buffers, and while that's not a use case
that anyone should use, it should still work correctly.

The end result is that no buffer will be selected, and hence a completion
with '0' as the result will be posted, without a buffer attached.

Fixes: 35c8711c ("io_uring/kbuf: add helpers for getting/peeking multiple buffers")
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 1c47c0d6

io_uring/kbuf.c

+1 −1
Original line number Diff line number Diff line
@@ -129,7 +129,7 @@ static int io_provided_buffers_select(struct io_kiocb *req, size_t *len, 


	iov[0].iov_base = buf;

	iov[0].iov_len = *len;

	return 0;

	return 1;

}



static struct io_uring_buf *io_ring_head_to_buf(struct io_uring_buf_ring *br,