Hello Jyri Sarha,
The patch a75a053f1eef: "ASoC: davinci-mcasp: Set rule constraints if implicit BCLK divider is used" from Mar 20, 2015, leads to the following Smatch warning:
sound/soc/davinci/davinci-mcasp.c:1152 davinci_mcasp_startup() error: buffer overflow 'mcasp->ruledata' 2 <= 2
sound/soc/davinci/davinci-mcasp.c 1138 1139 /* 1140 * Limit the maximum allowed channels for the first stream: 1141 * number of serializers for the direction * tdm slots per serializer 1142 */ 1143 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 1144 dir = TX_MODE; 1145 else 1146 dir = RX_MODE;
dir is either 1 or 2.
1147 1148 for (i = 0; i < mcasp->num_serializer; i++) { 1149 if (mcasp->serial_dir[i] == dir) 1150 max_channels++; 1151 } 1152 mcasp->ruledata[dir].serializers = max_channels; ^^^^^^^^^^^^^ ->ruledata[] has only two elements so ->ruledata[2] is beyond the end of the array.
1153 max_channels *= mcasp->tdm_slots;
regards, dan carpenter