ALSA: azt3328: use a helper variable to remove one indirection in hotpath

Signed-off-by: Andreas Mohr <andi@lisas.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/azt3328.c b/sound/pci/azt3328.c
index 0cb5499..b1fad46 100644 (file)
--- a/sound/pci/azt3328.c
+++ b/sound/pci/azt3328.c
@@ -294,6 +294,7 @@ MODULE_PARM_DESC(seqtimer_scaling, "Set 1024000Hz sequencer timer scale factor (
 
 struct snd_azf3328_codec_data {
        unsigned long io_base;
+       unsigned int dma_base; /* helper to avoid an indirection in hotpath */
        struct snd_pcm_substream *substream;
        bool running;
        const char *name;
@@ -1165,14 +1166,17 @@ snd_azf3328_codec_setdmaa(struct snd_azf3328 *chip,
 static int
 snd_azf3328_codec_prepare(struct snd_pcm_substream *substream)
 {
-#if 0
-       struct snd_azf3328 *chip = snd_pcm_substream_chip(substream);
        struct snd_pcm_runtime *runtime = substream->runtime;
+       struct snd_azf3328_codec *codec = runtime->private_data;
+#if 0
         unsigned int size = snd_pcm_lib_buffer_bytes(substream);
        unsigned int count = snd_pcm_lib_period_bytes(substream);
 #endif
 
        snd_azf3328_dbgcallenter();
+
+       codec->dma_base = runtime->dma_addr;
+
 #if 0
        snd_azf3328_codec_setfmt(chip, AZF_CODEC_...,
                runtime->rate,
@@ -1370,18 +1374,17 @@ snd_azf3328_codec_pointer(struct snd_pcm_substream *substream,
 {
        const struct snd_azf3328 *chip = snd_pcm_substream_chip(substream);
        const struct snd_azf3328_codec_data *codec = &chip->codecs[codec_type];
-       unsigned long bufptr, result;
+       unsigned long result;
        snd_pcm_uframes_t frmres;
 
-#ifdef QUERY_HARDWARE
-       bufptr = snd_azf3328_codec_inl(codec, IDX_IO_CODEC_DMA_START_1);
-#else
-       bufptr = substream->runtime->dma_addr;
-#endif
        result = snd_azf3328_codec_inl(codec, IDX_IO_CODEC_DMA_CURRPOS);
 
        /* calculate offset */
-       result -= bufptr;
+#ifdef QUERY_HARDWARE
+       result -= snd_azf3328_codec_inl(codec, IDX_IO_CODEC_DMA_START_1);
+#else
+       result -= codec->dma_base;
+#endif
        frmres = bytes_to_frames( substream->runtime, result);
        snd_azf3328_dbgcodec("%08li %s @ 0x%8lx, frames %8ld\n",
                                jiffies, codec->name, result, frmres);