io_uring: don't mark S_ISBLK async work as unbounded

S_ISBLK is marked as unbounded work for async preparation, because it doesn't match S_ISREG. That is incorrect, as any read/write to a block device is also a bounded operation. Fix it up and ensure that S_ISBLK isn't marked unbounded. Signed-off-by: Jens Axboe <[email protected]>
zandrey · Apr 1, 2021 · 4b982bd · 4b982bd
1 parent 82734c5
commit 4b982bd
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/fs/io_uring.c b/fs/io_uring.c
@@ -1213,7 +1213,7 @@ static void io_prep_async_work(struct io_kiocb *req)
 	if (req->flags & REQ_F_ISREG) {
 		if (def->hash_reg_file || (ctx->flags & IORING_SETUP_IOPOLL))
 			io_wq_hash_work(&req->work, file_inode(req->file));
-	} else {
+	} else if (!req->file || !S_ISBLK(file_inode(req->file)->i_mode)) {
 		if (def->unbound_nonreg_file)
 			req->work.flags |= IO_WQ_WORK_UNBOUND;
 	}