From: Jens Axboe Date: Wed, 20 May 2020 03:20:27 +0000 (-0600) Subject: io_uring: don't add non-IO requests to iopoll pending list X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=b532576ed39efe3b351ae8320b2ab67a4c4c3719;p=linux.git io_uring: don't add non-IO requests to iopoll pending list We normally disable any commands that aren't specifically poll commands for a ring that is setup for polling, but we do allow buffer provide and remove commands to support buffer selection for polled IO. Once a request is issued, we add it to the poll list to poll for completion. But we should not do that for non-IO commands, as those request complete inline immediately and aren't pollable. If we do, we can leave requests on the iopoll list after they are freed. Fixes: ddf0322db79c ("io_uring: add IORING_OP_PROVIDE_BUFFERS") Signed-off-by: Jens Axboe --- diff --git a/fs/io_uring.c b/fs/io_uring.c index d43f7e98e07a5..f9f79ac5ac7b9 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -5306,7 +5306,8 @@ static int io_issue_sqe(struct io_kiocb *req, const struct io_uring_sqe *sqe, if (ret) return ret; - if (ctx->flags & IORING_SETUP_IOPOLL) { + /* If the op doesn't have a file, we're not polling for it */ + if ((ctx->flags & IORING_SETUP_IOPOLL) && req->file) { const bool in_async = io_wq_current_is_worker(); if (req->result == -EAGAIN)