diff options
Diffstat (limited to 'drivers/char/applicom.c')
| -rw-r--r-- | drivers/char/applicom.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/char/applicom.c b/drivers/char/applicom.c index f4ae0e0fb63..25373df1dcf 100644 --- a/drivers/char/applicom.c +++ b/drivers/char/applicom.c @@ -26,7 +26,7 @@ #include <linux/sched.h> #include <linux/slab.h> #include <linux/errno.h> -#include <linux/smp_lock.h> +#include <linux/mutex.h> #include <linux/miscdevice.h> #include <linux/pci.h> #include <linux/wait.h> @@ -60,6 +60,7 @@ #define PCI_DEVICE_ID_APPLICOM_PCI2000PFB 0x0003 #endif +static DEFINE_MUTEX(ac_mutex); static char *applicom_pci_devnames[] = { "PCI board", "PCI2000IBS / PCI2000CAN", @@ -565,6 +566,7 @@ static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_ struct mailbox mailbox; /* Got a packet for us */ + memset(&st_loc, 0, sizeof(st_loc)); ret = do_ac_read(i, buf, &st_loc, &mailbox); spin_unlock_irqrestore(&apbs[i].mutex, flags); set_current_state(TASK_RUNNING); @@ -707,7 +709,7 @@ static long ac_ioctl(struct file *file, unsigned int cmd, unsigned long arg) if (IS_ERR(adgl)) return PTR_ERR(adgl); - lock_kernel(); + mutex_lock(&ac_mutex); IndexCard = adgl->num_card-1; if(cmd != 6 && ((IndexCard >= MAX_BOARD) || !apbs[IndexCard].RamIO)) { @@ -717,7 +719,7 @@ static long ac_ioctl(struct file *file, unsigned int cmd, unsigned long arg) warncount--; } kfree(adgl); - unlock_kernel(); + mutex_unlock(&ac_mutex); return -EINVAL; } @@ -835,7 +837,7 @@ static long ac_ioctl(struct file *file, unsigned int cmd, unsigned long arg) } Dummy = readb(apbs[IndexCard].RamIO + VERS); kfree(adgl); - unlock_kernel(); + mutex_unlock(&ac_mutex); return 0; } |