Daniel Borkmann c540594f86 bpf, mlx4: fix prog refcount in mlx4_en_try_alloc_resources error path ... Commit 67f8b1dcb9 ("net/mlx4_en: Refactor the XDP forwarding rings scheme") added a bug in that the prog's reference count is not dropped in the error path when mlx4_en_try_alloc_resources() is failing from mlx4_xdp_set(). We previously took bpf_prog_add(prog, priv->rx_ring_num - 1), that we need to release again. Earlier in the call path, dev_change_xdp_fd() itself holds a reference to the prog as well (hence the '- 1' in the bpf_prog_add()), so a simple atomic_sub() is safe to use here. When an error is propagated, then bpf_prog_put() is called eventually from dev_change_xdp_fd() Fixes: 67f8b1dcb9 ("net/mlx4_en: Refactor the XDP forwarding rings scheme") Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>		2016-11-12 23:31:57 -05:00
..
arraymap.c	bpf: Add bpf_current_task_under_cgroup helper	2016-08-12 21:49:41 -07:00
core.c	bpf: add helper for retrieving current numa node id	2016-10-22 17:05:52 -04:00
hashtab.c	bpf: restore behavior of bpf_map_update_elem	2016-08-06 20:49:19 -04:00
helpers.c	bpf: add helper for retrieving current numa node id	2016-10-22 17:05:52 -04:00
inode.c	bpf, inode: add support for symlinks and fix mtime/ctime	2016-10-31 15:28:11 -04:00
Makefile	bpf: introduce percpu_freelist	2016-03-08 15:28:31 -05:00
percpu_freelist.c	bpf: introduce percpu_freelist	2016-03-08 15:28:31 -05:00
percpu_freelist.h	bpf: introduce percpu_freelist	2016-03-08 15:28:31 -05:00
stackmap.c	bpf: add BPF_CALL_x macros for declaring helpers	2016-09-09 19:36:04 -07:00
syscall.c	bpf, mlx4: fix prog refcount in mlx4_en_try_alloc_resources error path	2016-11-12 23:31:57 -05:00
verifier.c	bpf: Remove unused but set variables	2016-11-09 21:15:00 -05:00