diff options
Diffstat (limited to 'sound/oss/sh_dac_audio.c')
| -rw-r--r-- | sound/oss/sh_dac_audio.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/sound/oss/sh_dac_audio.c b/sound/oss/sh_dac_audio.c index 479e3025a8a..53bba16bf70 100644 --- a/sound/oss/sh_dac_audio.c +++ b/sound/oss/sh_dac_audio.c @@ -16,7 +16,7 @@ #include <linux/slab.h> #include <linux/fs.h> #include <linux/sound.h> -#include <linux/smp_lock.h> +#include <linux/mutex.h> #include <linux/soundcard.h> #include <linux/interrupt.h> #include <linux/hrtimer.h> @@ -34,6 +34,7 @@ #define BUFFER_SIZE 48000 +static DEFINE_MUTEX(sh_dac_audio_mutex); static int rate; static int empty; static char *data_buffer, *buffer_begin, *buffer_end; @@ -163,9 +164,9 @@ static long dac_audio_unlocked_ioctl(struct file *file, u_int cmd, u_long arg) { int ret; - lock_kernel(); + mutex_lock(&sh_dac_audio_mutex); ret = dac_audio_ioctl(file, cmd, arg); - unlock_kernel(); + mutex_unlock(&sh_dac_audio_mutex); return ret; } @@ -229,16 +230,16 @@ static int dac_audio_open(struct inode *inode, struct file *file) if (file->f_mode & FMODE_READ) return -ENODEV; - lock_kernel(); + mutex_lock(&sh_dac_audio_mutex); if (in_use) { - unlock_kernel(); + mutex_unlock(&sh_dac_audio_mutex); return -EBUSY; } in_use = 1; dac_audio_start(); - unlock_kernel(); + mutex_unlock(&sh_dac_audio_mutex); return 0; } |