[alsa-devel] [PATCH][alsa-lib] topology: fix sign-compare warning introduced to set_link_hw_config() and tplg_add_link_object()

[Mengdong Lin]

On 12/17/2016 08:40 AM, Takashi Sakamoto wrote:
> Ping to Mengdong Lin. I wish this patch would be included to next
> release of this library.

Sorry for the late reply and thanks for the fix. The patches looks good 
to me.

Thanks
Mengdong

>
> On 2016年11月30日 00:41, Takashi Sakamoto wrote:
>> Some functions recently introduced to this library include comparison
>> between variables with different types, then compiler generates
>> below warnings.
>>
>> pcm.c: In function ‘set_link_hw_config’:
>> pcm.c:1179:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
>>    for (i = 0; i < cfg->tx_channels; i++)
>>                  ^
>> pcm.c:1183:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
>>    for (i = 0; i < cfg->rx_channels; i++)
>>                  ^
>> pcm.c: In function ‘tplg_add_link_object’:
>> pcm.c:1223:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
>>    for (i = 0; i < link->num_streams; i++)
>>                  ^
>> pcm.c:1231:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
>>    for (i = 0; i < link->num_hw_configs; i++)
>>
>> This commit suppresses them.
>>
>> Fixes: 6b4d775b9752 ("topology: Parse HW configurations of physical DAI links defined by C API")
>> Signed-off-by: Takashi Sakamoto <o-takashi at sakamocchi.jp>
>> ---
>>   src/topology/pcm.c | 4 ++--
>>   1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/src/topology/pcm.c b/src/topology/pcm.c
>> index 8f8a703..1de8655 100644
>> --- a/src/topology/pcm.c
>> +++ b/src/topology/pcm.c
>> @@ -1147,7 +1147,7 @@ int tplg_add_pcm_object(snd_tplg_t *tplg, snd_tplg_obj_template_t *t)
>>   static int set_link_hw_config(struct snd_soc_tplg_hw_config *cfg,
>>   			struct snd_tplg_hw_config_template *tpl)
>>   {
>> -	int i;
>> +	unsigned int i;
>>
>>   	cfg->size = sizeof(*cfg);
>>   	cfg->id = tpl->id;
>> @@ -1190,7 +1190,7 @@ int tplg_add_link_object(snd_tplg_t *tplg, snd_tplg_obj_template_t *t)
>>   	struct snd_tplg_link_template *link_tpl = t->link;
>>   	struct snd_soc_tplg_link_config *link, *_link;
>>   	struct tplg_elem *elem;
>> -	int i;
>> +	unsigned int i;
>>
>>   	if (t->type != SND_TPLG_TYPE_LINK && t->type != SND_TPLG_TYPE_BE
>>   	    && t->type != SND_TPLG_TYPE_CC)
>>
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