io_uring: rsrc: Optimize return value variable 'ret'

The initialization assignment of the variable ret is changed to 0, only
in 'goto fail;' Use the ret variable as the function return value.
Signed-off-by: Li zeming <zeming@nfschina.com>
Link: https://lore.kernel.org/r/20230317182538.3027-1-zeming@nfschina.comSigned-off-by: Jens Axboe <axboe@kernel.dk>

io_uring/rsrc.c

@@ -410,7 +410,7 @@ __cold static int io_rsrc_data_alloc(struct io_ring_ctx *ctx,
 				     unsigned nr, struct io_rsrc_data **pdata)
 {
 	struct io_rsrc_data *data;
-	int ret = -ENOMEM;
+	int ret = 0;
 	unsigned i;
 
 	data = kzalloc(sizeof(*data), GFP_KERNEL);