diff mbox series

[for-next,v2,01/25] io_uring: make reg buf init consistent

Message ID 1835f8612fd77ed79712f566778cad6691d41c06.1655213915.git.asml.silence@gmail.com (mailing list archive)
State New
Headers show
Series 5.20 cleanups and poll optimisations | expand

Commit Message

Pavel Begunkov June 14, 2022, 2:36 p.m. UTC 
The default (i.e. empty) state of register buffer is dummy_ubuf, so set
it to dummy on init instead of NULL.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
---
 io_uring/rsrc.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)
diff mbox series

Patch

diff --git a/io_uring/rsrc.c b/io_uring/rsrc.c
index fef46972c327..fd1323482030 100644
--- a/io_uring/rsrc.c
+++ b/io_uring/rsrc.c
@@ -567,7 +567,7 @@  static int __io_sqe_buffers_update(struct io_ring_ctx *ctx,
 				io_buffer_unmap(ctx, &imu);
 				break;
 			}
-			ctx->user_bufs[i] = NULL;
+			ctx->user_bufs[i] = ctx->dummy_ubuf;
 			needs_switch = true;
 		}
 
@@ -1200,14 +1200,11 @@  static int io_sqe_buffer_register(struct io_ring_ctx *ctx, struct iovec *iov,
 	size_t size;
 	int ret, nr_pages, i;
 
-	if (!iov->iov_base) {
-		*pimu = ctx->dummy_ubuf;
+	*pimu = ctx->dummy_ubuf;
+	if (!iov->iov_base)
 		return 0;
-	}
 
-	*pimu = NULL;
 	ret = -ENOMEM;
-
 	pages = io_pin_pages((unsigned long) iov->iov_base, iov->iov_len,
 				&nr_pages);
 	if (IS_ERR(pages)) {