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path: root/drivers/char/pcmcia/cm4040_cs.c
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Diffstat (limited to 'drivers/char/pcmcia/cm4040_cs.c')
-rw-r--r--drivers/char/pcmcia/cm4040_cs.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/char/pcmcia/cm4040_cs.c b/drivers/char/pcmcia/cm4040_cs.c
index 815cde1d0570..04c0a895740e 100644
--- a/drivers/char/pcmcia/cm4040_cs.c
+++ b/drivers/char/pcmcia/cm4040_cs.c
@@ -24,7 +24,7 @@
#include <linux/fs.h>
#include <linux/delay.h>
#include <linux/poll.h>
-#include <linux/smp_lock.h>
+#include <linux/mutex.h>
#include <linux/wait.h>
#include <asm/uaccess.h>
#include <asm/io.h>
@@ -49,6 +49,7 @@
__func__ , ## args); \
} while (0)
+static DEFINE_MUTEX(cm4040_mutex);
static char *version =
"OMNIKEY CardMan 4040 v1.1.0gm5 - All bugs added by Harald Welte";
@@ -444,7 +445,7 @@ static int cm4040_open(struct inode *inode, struct file *filp)
if (minor >= CM_MAX_DEV)
return -ENODEV;
- lock_kernel();
+ mutex_lock(&cm4040_mutex);
link = dev_table[minor];
if (link == NULL || !pcmcia_dev_present(link)) {
ret = -ENODEV;
@@ -473,7 +474,7 @@ static int cm4040_open(struct inode *inode, struct file *filp)
DEBUGP(2, dev, "<- cm4040_open (successfully)\n");
ret = nonseekable_open(inode, filp);
out:
- unlock_kernel();
+ mutex_unlock(&cm4040_mutex);
return ret;
}