diff options
Diffstat (limited to 'drivers/char/pcmcia/cm4040_cs.c')
| -rw-r--r-- | drivers/char/pcmcia/cm4040_cs.c | 7 |
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; } |