ALSA: hdspm - remove unused arrays, reduce stack usage in hwdep_ioctl

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/rme9652/hdspm.c b/sound/pci/rme9652/hdspm.c
index 28a1eb3..6de88b0 100644 (file)
--- a/sound/pci/rme9652/hdspm.c
+++ b/sound/pci/rme9652/hdspm.c
@@ -575,12 +575,6 @@ static char *texts_freq[] = {
        "192 kHz"
 };
 
-static char *texts_sync_status[] = {
-       "no lock",
-       "lock",
-       "sync"
-};
-
 static char *texts_ports_madi[] = {
        "MADI.1", "MADI.2", "MADI.3", "MADI.4", "MADI.5", "MADI.6",
        "MADI.7", "MADI.8", "MADI.9", "MADI.10", "MADI.11", "MADI.12",
@@ -692,28 +686,6 @@ static char channel_map_unity_ss[HDSPM_MAX_CHANNELS] = {
        56, 57, 58, 59, 60, 61, 62, 63
 };
 
-static char channel_map_unity_ds[HDSPM_MAX_CHANNELS] = {
-       0, 2, 4, 6, 8, 10, 12, 14,
-       16, 18, 20, 22, 24, 26, 28, 30,
-       32, 34, 36, 38, 40, 42, 44, 46,
-       48, 50, 52, 54, 56, 58, 60, 62,
-       -1, -1, -1, -1, -1, -1, -1, -1,
-       -1, -1, -1, -1, -1, -1, -1, -1,
-       -1, -1, -1, -1, -1, -1, -1, -1,
-       -1, -1, -1, -1, -1, -1, -1, -1,
-};
-
-static char channel_map_unity_qs[HDSPM_MAX_CHANNELS] = {
-       0, 4, 8, 12, 16, 20, 24, 28,
-       32, 36, 40, 44, 48, 52, 56, 60,
-       -1, -1, -1, -1, -1, -1, -1, -1,
-       -1, -1, -1, -1, -1, -1, -1, -1,
-       -1, -1, -1, -1, -1, -1, -1, -1,
-       -1, -1, -1, -1, -1, -1, -1, -1,
-       -1, -1, -1, -1, -1, -1, -1, -1,
-       -1, -1, -1, -1, -1, -1, -1, -1,
-};
-
 static char channel_map_raydat_ss[HDSPM_MAX_CHANNELS] = {
        4, 5, 6, 7, 8, 9, 10, 11,       /* ADAT 1 */
        12, 13, 14, 15, 16, 17, 18, 19, /* ADAT 2 */
@@ -952,6 +924,8 @@ struct hdspm {
        int texts_autosync_items;
 
        cycles_t last_interrupt;
+
+       struct hdspm_peak_rms peak_rms;
 };
 
 
@@ -5952,7 +5926,7 @@ static int snd_hdspm_hwdep_ioctl(struct snd_hwdep *hw, struct file *file,
        struct hdspm_config info;
        struct hdspm_status status;
        struct hdspm_version hdspm_version;
-       struct hdspm_peak_rms levels;
+       struct hdspm_peak_rms *levels;
        struct hdspm_ltc ltc;
        unsigned int statusregister;
        long unsigned int s;
@@ -5961,28 +5935,29 @@ static int snd_hdspm_hwdep_ioctl(struct snd_hwdep *hw, struct file *file,
        switch (cmd) {
 
        case SNDRV_HDSPM_IOCTL_GET_PEAK_RMS:
+               levels = &hdspm->peak_rms;
                for (i = 0; i < HDSPM_MAX_CHANNELS; i++) {
-                       levels.input_peaks[i] =
+                       levels->input_peaks[i] =
                                readl(hdspm->iobase +
                                                HDSPM_MADI_INPUT_PEAK + i*4);
-                       levels.playback_peaks[i] =
+                       levels->playback_peaks[i] =
                                readl(hdspm->iobase +
                                                HDSPM_MADI_PLAYBACK_PEAK + i*4);
-                       levels.output_peaks[i] =
+                       levels->output_peaks[i] =
                                readl(hdspm->iobase +
                                                HDSPM_MADI_OUTPUT_PEAK + i*4);
 
-                       levels.input_rms[i] =
+                       levels->input_rms[i] =
                                ((uint64_t) readl(hdspm->iobase +
                                        HDSPM_MADI_INPUT_RMS_H + i*4) << 32) |
                                (uint64_t) readl(hdspm->iobase +
                                                HDSPM_MADI_INPUT_RMS_L + i*4);
-                       levels.playback_rms[i] =
+                       levels->playback_rms[i] =
                                ((uint64_t)readl(hdspm->iobase +
                                        HDSPM_MADI_PLAYBACK_RMS_H+i*4) << 32) |
                                (uint64_t)readl(hdspm->iobase +
                                        HDSPM_MADI_PLAYBACK_RMS_L + i*4);
-                       levels.output_rms[i] =
+                       levels->output_rms[i] =
                                ((uint64_t)readl(hdspm->iobase +
                                        HDSPM_MADI_OUTPUT_RMS_H + i*4) << 32) |
                                (uint64_t)readl(hdspm->iobase +
@@ -5990,15 +5965,15 @@ static int snd_hdspm_hwdep_ioctl(struct snd_hwdep *hw, struct file *file,
                }
 
                if (hdspm->system_sample_rate > 96000) {
-                       levels.speed = qs;
+                       levels->speed = qs;
                } else if (hdspm->system_sample_rate > 48000) {
-                       levels.speed = ds;
+                       levels->speed = ds;
                } else {
-                       levels.speed = ss;
+                       levels->speed = ss;
                }
-               levels.status2 = hdspm_read(hdspm, HDSPM_statusRegister2);
+               levels->status2 = hdspm_read(hdspm, HDSPM_statusRegister2);
 
-               s = copy_to_user(argp, &levels, sizeof(struct hdspm_peak_rms));
+               s = copy_to_user(argp, levels, sizeof(struct hdspm_peak_rms));
                if (0 != s) {
                        /* snd_printk(KERN_ERR "copy_to_user(.., .., %lu): %lu
                         [Levels]\n", sizeof(struct hdspm_peak_rms), s);