ALSA: pcm_format_to_bits strong-typed conversion

Add a function to handle conversion from snd_pcm_format_t
to bitwise with proper typing.

Change such conversions to use this function and silence sparse
warnings.

Signed-off-by: Eldad Zack <eldad@fogrefinery.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

8 files changed, 18 insertions, 11 deletions

diff --git a/include/sound/pcm.h b/include/sound/pcm.h
index 1b0c6484e71a..5357ecbecc48 100644
--- a/include/sound/pcm.h
+++ b/include/sound/pcm.h
@@ -1133,4 +1133,10 @@ int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream,
                            unsigned long private_value,
                            struct snd_pcm_chmap **info_ret);
 
+/* Strong-typed conversion of pcm_format to bitwise */
+static inline u64 pcm_format_to_bits(snd_pcm_format_t pcm_format)
+{
+        return 1ULL << (__force int) pcm_format;
+}
+
 #endif /* __SOUND_PCM_H */
diff --git a/sound/aoa/soundbus/i2sbus/pcm.c b/sound/aoa/soundbus/i2sbus/pcm.c
index 19491ed9292f..7b74a4ba75f8 100644
--- a/sound/aoa/soundbus/i2sbus/pcm.c
+++ b/sound/aoa/soundbus/i2sbus/pcm.c
@@ -179,7 +179,7 @@ static int i2sbus_pcm_open(struct i2sbus_dev *i2sdev, int in)
          */
         if (other->active) {
                 /* FIXME: is this guaranteed by the alsa api? */
-                hw->formats &= (1ULL << i2sdev->format);
+                hw->formats &= pcm_format_to_bits(i2sdev->format);
                 /* see above, restrict rates to the one we already have */
                 hw->rate_min = i2sdev->rate;
                 hw->rate_max = i2sdev->rate;
diff --git a/sound/atmel/ac97c.c b/sound/atmel/ac97c.c
index 79d6bda58753..6b7e2b5a72de 100644
--- a/sound/atmel/ac97c.c
+++ b/sound/atmel/ac97c.c
@@ -182,7 +182,7 @@ static int atmel_ac97c_playback_open(struct snd_pcm_substream *substream)
                 runtime->hw.rate_max = chip->cur_rate;
         }
         if (chip->cur_format)
-                runtime->hw.formats = (1ULL << chip->cur_format);
+                runtime->hw.formats = pcm_format_to_bits(chip->cur_format);
         mutex_unlock(&opened_mutex);
         chip->playback_substream = substream;
         return 0;
@@ -201,7 +201,7 @@ static int atmel_ac97c_capture_open(struct snd_pcm_substream *substream)
                 runtime->hw.rate_max = chip->cur_rate;
         }
         if (chip->cur_format)
-                runtime->hw.formats = (1ULL << chip->cur_format);
+                runtime->hw.formats = pcm_format_to_bits(chip->cur_format);
         mutex_unlock(&opened_mutex);
         chip->capture_substream = substream;
         return 0;
diff --git a/sound/drivers/aloop.c b/sound/drivers/aloop.c
index 64d534710b51..6f78de9c6fb6 100644
--- a/sound/drivers/aloop.c
+++ b/sound/drivers/aloop.c
@@ -325,7 +325,7 @@ static void params_change(struct snd_pcm_substream *substream)
         struct loopback_pcm *dpcm = runtime->private_data;
         struct loopback_cable *cable = dpcm->cable;
 
-        cable->hw.formats = (1ULL << runtime->format);
+        cable->hw.formats = pcm_format_to_bits(runtime->format);
         cable->hw.rate_min = runtime->rate;
         cable->hw.rate_max = runtime->rate;
         cable->hw.channels_min = runtime->channels;
diff --git a/sound/pci/asihpi/asihpi.c b/sound/pci/asihpi/asihpi.c
index 0aabfedeecba..160cf830d327 100644
--- a/sound/pci/asihpi/asihpi.c
+++ b/sound/pci/asihpi/asihpi.c
@@ -966,7 +966,7 @@ static u64 snd_card_asihpi_playback_formats(struct snd_card_asihpi *asihpi,
                 if (!err)
                         err = hpi_outstream_query_format(h_stream, &hpi_format);
                 if (!err && (hpi_to_alsa_formats[format] != -1))
-                        formats |= (1ULL << hpi_to_alsa_formats[format]);
+                        formats |= pcm_format_to_bits(hpi_to_alsa_formats[format]);
         }
         return formats;
 }
@@ -1142,7 +1142,7 @@ static u64 snd_card_asihpi_capture_formats(struct snd_card_asihpi *asihpi,
                 if (!err)
                         err = hpi_instream_query_format(h_stream, &hpi_format);
                 if (!err)
-                        formats |= (1ULL << hpi_to_alsa_formats[format]);
+                        formats |= pcm_format_to_bits(hpi_to_alsa_formats[format]);
         }
         return formats;
 }
diff --git a/sound/usb/format.c b/sound/usb/format.c
index 020ede0259eb..99299ffb33ac 100644
--- a/sound/usb/format.c
+++ b/sound/usb/format.c
@@ -365,7 +365,8 @@ static int parse_audio_format_i(struct snd_usb_audio *chip,
 {
         struct usb_interface_descriptor *altsd = get_iface_desc(iface);
         int protocol = altsd->bInterfaceProtocol;
-        int pcm_format, ret;
+        snd_pcm_format_t pcm_format;
+        int ret;
 
         if (fmt->bFormatType == UAC_FORMAT_TYPE_III) {
                 /* FIXME: the format type is really IECxxx
@@ -384,7 +385,7 @@ static int parse_audio_format_i(struct snd_usb_audio *chip,
                 default:
                         pcm_format = SNDRV_PCM_FORMAT_S16_LE;
                 }
-                fp->formats = 1uLL << pcm_format;
+                fp->formats = pcm_format_to_bits(pcm_format);
         } else {
                 fp->formats = parse_audio_format_i_type(chip, fp, format,
                                                         fmt, protocol);
diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
index 9723f3ceb155..93b6e32cfead 100644
--- a/sound/usb/pcm.c
+++ b/sound/usb/pcm.c
@@ -100,7 +100,7 @@ static struct audioformat *find_format(struct snd_usb_substream *subs)
         int cur_attr = 0, attr;
 
         list_for_each_entry(fp, &subs->fmt_list, list) {
-                if (!(fp->formats & (1uLL << subs->pcm_format)))
+                if (!(fp->formats & pcm_format_to_bits(subs->pcm_format)))
                         continue;
                 if (fp->channels != subs->channels)
                         continue;
@@ -478,7 +478,7 @@ static int match_endpoint_audioformats(struct audioformat *fp,
                 return 0;
         }
 
-        if (!(fp->formats & (1ULL << pcm_format))) {
+        if (!(fp->formats & pcm_format_to_bits(pcm_format))) {
                 snd_printdd("%s: (fmt @%p) no match for format %d\n", __func__,
                         fp, pcm_format);
                 return 0;
diff --git a/sound/usb/proc.c b/sound/usb/proc.c
index 0182ef634d8b..135c76871063 100644
--- a/sound/usb/proc.c
+++ b/sound/usb/proc.c
@@ -85,7 +85,7 @@ static void proc_dump_substream_formats(struct snd_usb_substream *subs, struct s
                 snd_iprintf(buffer, "    Altset %d\n", fp->altsetting);
                 snd_iprintf(buffer, "    Format:");
                 for (fmt = 0; fmt <= SNDRV_PCM_FORMAT_LAST; ++fmt)
-                        if (fp->formats & (1uLL << fmt))
+                        if (fp->formats & pcm_format_to_bits(fmt))
                                 snd_iprintf(buffer, " %s",
                                             snd_pcm_format_name(fmt));
                 snd_iprintf(buffer, "\n");