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path: root/drivers/char/toshiba.c
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Diffstat (limited to 'drivers/char/toshiba.c')
-rw-r--r--drivers/char/toshiba.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/char/toshiba.c b/drivers/char/toshiba.c
index 3d6e96172453..014c9d90d297 100644
--- a/drivers/char/toshiba.c
+++ b/drivers/char/toshiba.c
@@ -68,7 +68,7 @@
#include <linux/stat.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
-#include <linux/smp_lock.h>
+#include <linux/mutex.h>
#include <linux/toshiba.h>
#define TOSH_MINOR_DEV 181
@@ -78,6 +78,7 @@ MODULE_AUTHOR("Jonathan Buzzard <jonathan@buzzard.org.uk>");
MODULE_DESCRIPTION("Toshiba laptop SMM driver");
MODULE_SUPPORTED_DEVICE("toshiba");
+static DEFINE_MUTEX(tosh_mutex);
static int tosh_fn;
module_param_named(fn, tosh_fn, int, 0);
MODULE_PARM_DESC(fn, "User specified Fn key detection port");
@@ -275,16 +276,16 @@ static long tosh_ioctl(struct file *fp, unsigned int cmd, unsigned long arg)
return -EINVAL;
/* do we need to emulate the fan ? */
- lock_kernel();
+ mutex_lock(&tosh_mutex);
if (tosh_fan==1) {
if (((ax==0xf300) || (ax==0xf400)) && (bx==0x0004)) {
err = tosh_emulate_fan(&regs);
- unlock_kernel();
+ mutex_unlock(&tosh_mutex);
break;
}
}
err = tosh_smm(&regs);
- unlock_kernel();
+ mutex_unlock(&tosh_mutex);
break;
default:
return -EINVAL;