xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Koodi Ongelmat Pull-pyynnöt Actions Paketit Projektit Julkaisut Wiki Toiminta

[ALSA] make control.c suspend aware

Selaa lähdekoodia 
Modules: Control Midlevel

This patch prevents user-space apps from accessing the hardware via
control interface while the soundcard is suspended.

Signed-off-by: Giuliano Pochini <pochini@shiny.it>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Giuliano Pochini
2006-03-13 14:11:11 +01:00
committed by Jaroslav Kysela
vanhempi 9230d2148a
commit 646494007b
2 muutettua tiedostoa jossa 42 lisäystä ja 11 poistoa
Download Patch File Download Diff File Expand all files Collapse all files

20
sound/core/control.c
Näytä tiedosto

@@ -658,7 +658,11 @@ static int snd_ctl_elem_info_user(struct snd_ctl_file *ctl,
if (copy_from_user(&info, _info, sizeof(info)))
return -EFAULT;
result = snd_ctl_elem_info(ctl, &info);
snd_power_lock(ctl->card);
result = snd_power_wait(ctl->card, SNDRV_CTL_POWER_D0, NULL);
if (result >= 0)
result = snd_ctl_elem_info(ctl, &info);
snd_power_unlock(ctl->card);
if (result >= 0)
if (copy_to_user(_info, &info, sizeof(info)))
return -EFAULT;
@@ -708,7 +712,11 @@ static int snd_ctl_elem_read_user(struct snd_card *card,
kfree(control);
return -EFAULT;
}
result = snd_ctl_elem_read(card, control);
snd_power_lock(card);
result = snd_power_wait(card, SNDRV_CTL_POWER_D0, NULL);
if (result >= 0)
result = snd_ctl_elem_read(card, control);
snd_power_unlock(card);
if (result >= 0)
if (copy_to_user(_control, control, sizeof(*control)))
result = -EFAULT;
@@ -758,6 +766,7 @@ static int snd_ctl_elem_write_user(struct snd_ctl_file *file,
struct snd_ctl_elem_value __user *_control)
{
struct snd_ctl_elem_value *control;
struct snd_card *card;
int result;
control = kmalloc(sizeof(*control), GFP_KERNEL);
@@ -767,7 +776,12 @@ static int snd_ctl_elem_write_user(struct snd_ctl_file *file,
kfree(control);
return -EFAULT;
}
result = snd_ctl_elem_write(file->card, file, control);
card = file->card;
snd_power_lock(card);
result = snd_power_wait(card, SNDRV_CTL_POWER_D0, NULL);
if (result >= 0)
result = snd_ctl_elem_write(card, file, control);
snd_power_unlock(card);
if (result >= 0)
if (copy_to_user(_control, control, sizeof(*control)))
result = -EFAULT;