ALSA: pcm_lib - cleanup & merge hw_ptr update functions
Do general cleanup in snd_pcm_update_hw_ptr*() routines and merge them.
The main change is hw_ptr_interrupt variable removal to simplify code
logic. This variable can be computed directly from hw_ptr.
Ensure that updated hw_ptr is not lower than previous one (it was possible
with old code in some obscure situations when interrupt was delayed or
the lowlevel driver returns wrong ring buffer position value).
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
diff --git a/include/sound/pcm_oss.h b/include/sound/pcm_oss.h
index cc4e226..760c969 100644
--- a/include/sound/pcm_oss.h
+++ b/include/sound/pcm_oss.h
@@ -61,7 +61,7 @@
struct snd_pcm_plugin *plugin_first;
struct snd_pcm_plugin *plugin_last;
#endif
- unsigned int prev_hw_ptr_interrupt;
+ unsigned int prev_hw_ptr_period;
};
struct snd_pcm_oss_file {
