[04/16] io_uring: fix a layering violation in io_iopoll_req_issued

Commit Message

Christoph Hellwig Oct. 12, 2021, 11:12 a.m. UTC

syscall-level code can't just poke into the details of the poll cookie,
which is private information of the block layer.

Signed-off-by: Christoph Hellwig <[e-mail]>
---
 fs/io_uring.c | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

Patch

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 82f867983bb32..5b625f97ee225 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -2743,19 +2743,12 @@  static void io_iopoll_req_issued(struct io_kiocb *req)
 		ctx->poll_multi_queue = false;
 	} else if (!ctx->poll_multi_queue) {
 		struct io_kiocb *list_req;
-		unsigned int queue_num0, queue_num1;
 
 		list_req = list_first_entry(&ctx->iopoll_list, struct io_kiocb,
 						inflight_entry);
 
-		if (list_req->file != req->file) {
+		if (list_req->file != req->file)
 			ctx->poll_multi_queue = true;
-		} else {
-			queue_num0 = blk_qc_t_to_queue_num(list_req->rw.kiocb.ki_cookie);
-			queue_num1 = blk_qc_t_to_queue_num(req->rw.kiocb.ki_cookie);
-			if (queue_num0 != queue_num1)
-				ctx->poll_multi_queue = true;
-		}
 	}
 
 	/*