[alsa-devel] [PATCH 1/6] ALSA: pcm: Add snd_mask_set_format() helper for standard usages

[Takashi Iwai]

Many drivers calling snd_mask_set() need to do ugly cast with __force
for shutting up the sparse warnings.  Actually almost all of them are
about setting the format, so it's far better to provide a common
helper snd_mask_set_format() to pass SNDRV_PCM_FORMAT_* directly
without the cast.

There are a few other calls of snd_mask_set(), but they are in the PCM
core code, so we leave them for now.

Signed-off-by: Takashi Iwai <tiwai at suse.de>
---
 include/sound/pcm_params.h | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/include/sound/pcm_params.h b/include/sound/pcm_params.h
index c704357775fc..2dd37cada7c0 100644
--- a/include/sound/pcm_params.h
+++ b/include/sound/pcm_params.h
@@ -87,6 +87,13 @@ static inline void snd_mask_set(struct snd_mask *mask, unsigned int val)
 	mask->bits[MASK_OFS(val)] |= MASK_BIT(val);
 }
 
+/* Most of drivers need only this one */
+static inline void snd_mask_set_format(struct snd_mask *mask,
+				       snd_pcm_format_t format)
+{
+	snd_mask_set(mask, (__force unsigned int)format);
+}
+
 static inline void snd_mask_reset(struct snd_mask *mask, unsigned int val)
 {
 	mask->bits[MASK_OFS(val)] &= ~MASK_BIT(val);
@@ -369,8 +376,7 @@ static inline int params_physical_width(const struct snd_pcm_hw_params *p)
 static inline void
 params_set_format(struct snd_pcm_hw_params *p, snd_pcm_format_t fmt)
 {
-	snd_mask_set(hw_param_mask(p, SNDRV_PCM_HW_PARAM_FORMAT),
-		(__force int)fmt);
+	snd_mask_set_format(hw_param_mask(p, SNDRV_PCM_HW_PARAM_FORMAT), fmt);
 }
 
 #endif /* __SOUND_PCM_PARAMS_H */
-- 
2.18.0