Re: [alsa-devel] ASoC: rsnd: fix sound route path when using SRC6/SRC9

Hi Geert

...

@@ -70,16 +71,19 @@ static int rsnd_cmd_init(struct rsnd_mod *mod, } else { struct rsnd_mod *src = rsnd_io_to_mod_src(io);

•           u32 path[] = {
  

•                   [0] = 0x30000,
  

•                   [1] = 0x30001,
  

•                   [2] = 0x40000,
  

•                   [3] = 0x10000,
  

•                   [4] = 0x20000,
  

•                   [5] = 0x40100
  

•           u8 cmd_case[] = {
  

•                   [0] = 0x3,
  

•                   [1] = 0x3,
  

•                   [2] = 0x4,
  

•                   [3] = 0x1,
  

•                   [4] = 0x2,
  

•                   [5] = 0x4,
  

•                   [6] = 0x1,
  

•                   [9] = 0x2,
            };
  
  

•           data = path[rsnd_mod_id(src)];
  

•           data = path[rsnd_mod_id(src)] |
  

With gcc 4.9.0:

sound/soc/sh/rcar/cmd.c: In function 'rsnd_cmd_init':
sound/soc/sh/rcar/cmd.c:85:14: warning: array subscript is below

array bounds [-Warray-bounds] data = path[rsnd_mod_id(src)] |

Hmm.... I tried random code/compile, but gcc behavior seems strange. Fore example if I removed next line, this warning disappeard

- data = path[rsnd_mod_id(src)] | - cmd_case[rsnd_mod_id(src)] << 16; + data = path[rsnd_mod_id(src)];

Is this related to this ? https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59124

Best regards --- Kuninori Morimoto