Code checking mmap() is back

diff --git a/src/pcm/pcm_surr.c b/src/pcm/pcm_surr.c
index 16821464afe24ecae2138424b36568ee792aa2e2..3f2a9710c9ac642d5af210e9e23b8730856df3c6 100644 (file)
--- a/src/pcm/pcm_surr.c
+++ b/src/pcm/pcm_surr.c
@@ -196,6 +196,11 @@ static snd_pcm_sframes_t snd_pcm_surround_writei(snd_pcm_t *pcm, const void *buf
        snd_pcm_surround_t *surr = pcm->private_data;
        if (surr->pcms == 1)
                return snd_pcm_writei(surr->pcm[0], buffer, size);
+       if (pcm->running_areas == NULL) {
+               int err;
+               if ((err = snd_pcm_mmap(pcm)) < 0)
+                       return err;
+       }
        return snd_pcm_mmap_writei(pcm, buffer, size);
 }
 
@@ -221,6 +226,11 @@ static snd_pcm_sframes_t snd_pcm_surround_readi(snd_pcm_t *pcm, void *buffer, sn
        snd_pcm_surround_t *surr = pcm->private_data;
        if (surr->pcms == 1)
                return snd_pcm_readi(surr->pcm[0], buffer, size);
+       if (pcm->running_areas == NULL) {
+               int err;
+               if ((err = snd_pcm_mmap(pcm)) < 0)
+                       return err;
+       }
        return snd_pcm_mmap_readi(pcm, buffer, size);
 }