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path: root/drivers/char/dsp56k.c
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Diffstat (limited to 'drivers/char/dsp56k.c')
-rw-r--r--drivers/char/dsp56k.c27
1 files changed, 14 insertions, 13 deletions
diff --git a/drivers/char/dsp56k.c b/drivers/char/dsp56k.c
index 8a1b28a10ef0..b3c756227e39 100644
--- a/drivers/char/dsp56k.c
+++ b/drivers/char/dsp56k.c
@@ -32,7 +32,7 @@
#include <linux/mm.h>
#include <linux/init.h>
#include <linux/device.h>
-#include <linux/smp_lock.h>
+#include <linux/mutex.h>
#include <linux/firmware.h>
#include <linux/platform_device.h>
#include <linux/uaccess.h> /* For put_user and get_user */
@@ -94,6 +94,7 @@
} \
}
+static DEFINE_MUTEX(dsp56k_mutex);
static struct dsp56k_device {
unsigned long in_use;
long maxio, timeout;
@@ -330,9 +331,9 @@ static long dsp56k_ioctl(struct file *file, unsigned int cmd,
if (len > DSP56K_MAX_BINARY_LENGTH) {
return -EINVAL;
}
- lock_kernel();
+ mutex_lock(&dsp56k_mutex);
r = dsp56k_upload(bin, len);
- unlock_kernel();
+ mutex_unlock(&dsp56k_mutex);
if (r < 0) {
return r;
}
@@ -342,16 +343,16 @@ static long dsp56k_ioctl(struct file *file, unsigned int cmd,
case DSP56K_SET_TX_WSIZE:
if (arg > 4 || arg < 1)
return -EINVAL;
- lock_kernel();
+ mutex_lock(&dsp56k_mutex);
dsp56k.tx_wsize = (int) arg;
- unlock_kernel();
+ mutex_unlock(&dsp56k_mutex);
break;
case DSP56K_SET_RX_WSIZE:
if (arg > 4 || arg < 1)
return -EINVAL;
- lock_kernel();
+ mutex_lock(&dsp56k_mutex);
dsp56k.rx_wsize = (int) arg;
- unlock_kernel();
+ mutex_unlock(&dsp56k_mutex);
break;
case DSP56K_HOST_FLAGS:
{
@@ -363,7 +364,7 @@ static long dsp56k_ioctl(struct file *file, unsigned int cmd,
if(get_user(out, &hf->out) < 0)
return -EFAULT;
- lock_kernel();
+ mutex_lock(&dsp56k_mutex);
if ((dir & 0x1) && (out & 0x1))
dsp56k_host_interface.icr |= DSP56K_ICR_HF0;
else if (dir & 0x1)
@@ -378,16 +379,16 @@ static long dsp56k_ioctl(struct file *file, unsigned int cmd,
if (dsp56k_host_interface.icr & DSP56K_ICR_HF1) status |= 0x2;
if (dsp56k_host_interface.isr & DSP56K_ISR_HF2) status |= 0x4;
if (dsp56k_host_interface.isr & DSP56K_ISR_HF3) status |= 0x8;
- unlock_kernel();
+ mutex_unlock(&dsp56k_mutex);
return put_user(status, &hf->status);
}
case DSP56K_HOST_CMD:
if (arg > 31 || arg < 0)
return -EINVAL;
- lock_kernel();
+ mutex_lock(&dsp56k_mutex);
dsp56k_host_interface.cvr = (u_char)((arg & DSP56K_CVR_HV_MASK) |
DSP56K_CVR_HC);
- unlock_kernel();
+ mutex_unlock(&dsp56k_mutex);
break;
default:
return -EINVAL;
@@ -427,7 +428,7 @@ static int dsp56k_open(struct inode *inode, struct file *file)
int dev = iminor(inode) & 0x0f;
int ret = 0;
- lock_kernel();
+ mutex_lock(&dsp56k_mutex);
switch(dev)
{
case DSP56K_DEV_56001:
@@ -454,7 +455,7 @@ static int dsp56k_open(struct inode *inode, struct file *file)
ret = -ENODEV;
}
out:
- unlock_kernel();
+ mutex_unlock(&dsp56k_mutex);
return ret;
}