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path: root/drivers/char/nwflash.c
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Diffstat (limited to 'drivers/char/nwflash.c')
-rw-r--r--drivers/char/nwflash.c12
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/char/nwflash.c b/drivers/char/nwflash.c
index 043a1c7b86b..a12f52400db 100644
--- a/drivers/char/nwflash.c
+++ b/drivers/char/nwflash.c
@@ -25,7 +25,6 @@
#include <linux/spinlock.h>
#include <linux/rwsem.h>
#include <linux/init.h>
-#include <linux/smp_lock.h>
#include <linux/mutex.h>
#include <linux/jiffies.h>
@@ -41,6 +40,7 @@
#define NWFLASH_VERSION "6.4"
+static DEFINE_MUTEX(flash_mutex);
static void kick_open(void);
static int get_flash_id(void);
static int erase_block(int nBlock);
@@ -96,7 +96,7 @@ static int get_flash_id(void)
static long flash_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
{
- lock_kernel();
+ mutex_lock(&flash_mutex);
switch (cmd) {
case CMD_WRITE_DISABLE:
gbWriteBase64Enable = 0;
@@ -114,10 +114,10 @@ static long flash_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
default:
gbWriteBase64Enable = 0;
gbWriteEnable = 0;
- unlock_kernel();
+ mutex_unlock(&flash_mutex);
return -EINVAL;
}
- unlock_kernel();
+ mutex_unlock(&flash_mutex);
return 0;
}
@@ -282,7 +282,7 @@ static loff_t flash_llseek(struct file *file, loff_t offset, int orig)
{
loff_t ret;
- lock_kernel();
+ mutex_lock(&flash_mutex);
if (flashdebug)
printk(KERN_DEBUG "flash_llseek: offset=0x%X, orig=0x%X.\n",
(unsigned int) offset, orig);
@@ -317,7 +317,7 @@ static loff_t flash_llseek(struct file *file, loff_t offset, int orig)
default:
ret = -EINVAL;
}
- unlock_kernel();
+ mutex_unlock(&flash_mutex);
return ret;
}