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Diffstat (limited to 'sound/oss/sh_dac_audio.c')
-rw-r--r--sound/oss/sh_dac_audio.c26
1 files changed, 21 insertions, 5 deletions
diff --git a/sound/oss/sh_dac_audio.c b/sound/oss/sh_dac_audio.c
index 4153752507e3..479e3025a8a3 100644
--- a/sound/oss/sh_dac_audio.c
+++ b/sound/oss/sh_dac_audio.c
@@ -16,6 +16,7 @@
#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/sound.h>
+#include <linux/smp_lock.h>
#include <linux/soundcard.h>
#include <linux/interrupt.h>
#include <linux/hrtimer.h>
@@ -92,7 +93,7 @@ static void dac_audio_set_rate(void)
wakeups_per_second = ktime_set(0, 1000000000 / rate);
}
-static int dac_audio_ioctl(struct inode *inode, struct file *file,
+static int dac_audio_ioctl(struct file *file,
unsigned int cmd, unsigned long arg)
{
int val;
@@ -158,6 +159,17 @@ static int dac_audio_ioctl(struct inode *inode, struct file *file,
return -EINVAL;
}
+static long dac_audio_unlocked_ioctl(struct file *file, u_int cmd, u_long arg)
+{
+ int ret;
+
+ lock_kernel();
+ ret = dac_audio_ioctl(file, cmd, arg);
+ unlock_kernel();
+
+ return ret;
+}
+
static ssize_t dac_audio_write(struct file *file, const char *buf, size_t count,
loff_t * ppos)
{
@@ -216,13 +228,17 @@ static int dac_audio_open(struct inode *inode, struct file *file)
{
if (file->f_mode & FMODE_READ)
return -ENODEV;
- if (in_use)
+
+ lock_kernel();
+ if (in_use) {
+ unlock_kernel();
return -EBUSY;
+ }
in_use = 1;
dac_audio_start();
-
+ unlock_kernel();
return 0;
}
@@ -237,8 +253,8 @@ static int dac_audio_release(struct inode *inode, struct file *file)
const struct file_operations dac_audio_fops = {
.read = dac_audio_read,
- .write = dac_audio_write,
- .ioctl = dac_audio_ioctl,
+ .write = dac_audio_write,
+ .unlocked_ioctl = dac_audio_unlocked_ioctl,
.open = dac_audio_open,
.release = dac_audio_release,
};