From f274495aea7b15225b3d83837121b22ef96e560c Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@kernel.dk>
Date: Fri, 30 Aug 2024 10:45:54 -0600
Subject: [PATCH] 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: 35c8711c8fc4 ("io_uring/kbuf: add helpers for getting/peeking multiple buffers")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
io_uring/kbuf.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/io_uring/kbuf.c b/io_uring/kbuf.c
index 1af2bd56af44a..bdfa30b38321b 100644
--- a/io_uring/kbuf.c
+++ b/io_uring/kbuf.c
@@ -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,
--
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