ALSA: core: sparse cleanups
Change the core code where sparse complains. In most cases, this means
just adding annotations to confirm that we indeed want to do the dirty
things we're doing.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/core/oss/pcm_oss.c b/sound/core/oss/pcm_oss.c
index a2e4eb3..23c34a0 100644
--- a/sound/core/oss/pcm_oss.c
+++ b/sound/core/oss/pcm_oss.c
@@ -41,6 +41,7 @@
#include <sound/info.h>
#include <linux/soundcard.h>
#include <sound/initval.h>
+#include <sound/mixer_oss.h>
#define OSS_ALSAEMULVER _SIOR ('M', 249, int)
@@ -60,7 +61,6 @@
MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
-extern int snd_mixer_oss_ioctl_card(struct snd_card *card, unsigned int cmd, unsigned long arg);
static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
@@ -656,7 +656,7 @@
#define AFMT_AC3 0x00000400
#define AFMT_VORBIS 0x00000800
-static int snd_pcm_oss_format_from(int format)
+static snd_pcm_format_t snd_pcm_oss_format_from(int format)
{
switch (format) {
case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW;
@@ -680,7 +680,7 @@
}
}
-static int snd_pcm_oss_format_to(int format)
+static int snd_pcm_oss_format_to(snd_pcm_format_t format)
{
switch (format) {
case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW;
@@ -843,7 +843,8 @@
size_t oss_frame_size;
int err;
int direct;
- int format, sformat, n;
+ snd_pcm_format_t format, sformat;
+ int n;
struct snd_mask sformat_mask;
struct snd_mask mask;
@@ -868,11 +869,11 @@
_snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
snd_mask_none(&mask);
if (atomic_read(&substream->mmap_count))
- snd_mask_set(&mask, SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
+ snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
else {
- snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_INTERLEAVED);
+ snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED);
if (!direct)
- snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
+ snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
}
err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
if (err < 0) {
@@ -891,19 +892,22 @@
else
sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
- if (sformat < 0 || !snd_mask_test(&sformat_mask, sformat)) {
- for (sformat = 0; sformat <= SNDRV_PCM_FORMAT_LAST; sformat++) {
- if (snd_mask_test(&sformat_mask, sformat) &&
+ if ((__force int)sformat < 0 ||
+ !snd_mask_test(&sformat_mask, (__force int)sformat)) {
+ for (sformat = (__force snd_pcm_format_t)0;
+ (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST;
+ sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) {
+ if (snd_mask_test(&sformat_mask, (__force int)sformat) &&
snd_pcm_oss_format_to(sformat) >= 0)
break;
}
- if (sformat > SNDRV_PCM_FORMAT_LAST) {
+ if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) {
snd_printd("Cannot find a format!!!\n");
err = -EINVAL;
goto failure;
}
}
- err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0);
+ err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0);
if (err < 0)
goto failure;
@@ -912,9 +916,9 @@
} else {
_snd_pcm_hw_params_any(params);
_snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
- SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
+ (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
_snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
- snd_pcm_oss_format_from(runtime->oss.format), 0);
+ (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0);
_snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
runtime->oss.channels, 0);
_snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
@@ -1185,10 +1189,10 @@
if (in_kernel) {
mm_segment_t fs;
fs = snd_enter_user();
- ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
+ ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames);
snd_leave_user(fs);
} else {
- ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
+ ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames);
}
if (ret != -EPIPE && ret != -ESTRPIPE)
break;
@@ -1230,10 +1234,10 @@
if (in_kernel) {
mm_segment_t fs;
fs = snd_enter_user();
- ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
+ ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames);
snd_leave_user(fs);
} else {
- ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
+ ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames);
}
if (ret == -EPIPE) {
if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
@@ -1333,7 +1337,7 @@
struct snd_pcm_plugin_channel *channels;
size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
if (!in_kernel) {
- if (copy_from_user(runtime->oss.buffer, (const char __user *)buf, bytes))
+ if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
return -EFAULT;
buf = runtime->oss.buffer;
}
@@ -1429,7 +1433,7 @@
struct snd_pcm_runtime *runtime = substream->runtime;
snd_pcm_sframes_t frames, frames1;
#ifdef CONFIG_SND_PCM_OSS_PLUGINS
- char __user *final_dst = (char __user *)buf;
+ char __user *final_dst = (char __force __user *)buf;
if (runtime->oss.plugin_first) {
struct snd_pcm_plugin_channel *channels;
size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
@@ -1549,6 +1553,7 @@
{
struct snd_pcm_runtime *runtime;
ssize_t result = 0;
+ snd_pcm_state_t state;
long res;
wait_queue_t wait;
@@ -1570,9 +1575,9 @@
result = 0;
set_current_state(TASK_INTERRUPTIBLE);
snd_pcm_stream_lock_irq(substream);
- res = runtime->status->state;
+ state = runtime->status->state;
snd_pcm_stream_unlock_irq(substream);
- if (res != SNDRV_PCM_STATE_RUNNING) {
+ if (state != SNDRV_PCM_STATE_RUNNING) {
set_current_state(TASK_RUNNING);
break;
}
@@ -1658,7 +1663,7 @@
size1);
size1 /= runtime->channels; /* frames */
fs = snd_enter_user();
- snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1);
+ snd_pcm_lib_write(substream, (void __force __user *)runtime->oss.buffer, size1);
snd_leave_user(fs);
}
} else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {