diff options
Diffstat (limited to 'drivers/char/synclink.c')
| -rw-r--r-- | drivers/char/synclink.c | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/drivers/char/synclink.c b/drivers/char/synclink.c index 0658fc548222..a2a58004e188 100644 --- a/drivers/char/synclink.c +++ b/drivers/char/synclink.c @@ -81,7 +81,6 @@ #include <linux/mm.h> #include <linux/seq_file.h> #include <linux/slab.h> -#include <linux/smp_lock.h> #include <linux/delay.h> #include <linux/netdevice.h> #include <linux/vmalloc.h> @@ -2436,7 +2435,9 @@ static int mgsl_get_stats(struct mgsl_struct * info, struct mgsl_icount __user * if (!user_icount) { memset(&info->icount, 0, sizeof(info->icount)); } else { + mutex_lock(&info->port.mutex); COPY_TO_USER(err, user_icount, &info->icount, sizeof(struct mgsl_icount)); + mutex_unlock(&info->port.mutex); if (err) return -EFAULT; } @@ -2461,7 +2462,9 @@ static int mgsl_get_params(struct mgsl_struct * info, MGSL_PARAMS __user *user_p printk("%s(%d):mgsl_get_params(%s)\n", __FILE__,__LINE__, info->device_name); + mutex_lock(&info->port.mutex); COPY_TO_USER(err,user_params, &info->params, sizeof(MGSL_PARAMS)); + mutex_unlock(&info->port.mutex); if (err) { if ( debug_level >= DEBUG_LEVEL_INFO ) printk( "%s(%d):mgsl_get_params(%s) user buffer copy failed\n", @@ -2501,11 +2504,13 @@ static int mgsl_set_params(struct mgsl_struct * info, MGSL_PARAMS __user *new_pa return -EFAULT; } + mutex_lock(&info->port.mutex); spin_lock_irqsave(&info->irq_spinlock,flags); memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS)); spin_unlock_irqrestore(&info->irq_spinlock,flags); mgsl_change_params(info); + mutex_unlock(&info->port.mutex); return 0; @@ -2935,7 +2940,6 @@ static int mgsl_ioctl(struct tty_struct *tty, struct file * file, unsigned int cmd, unsigned long arg) { struct mgsl_struct * info = tty->driver_data; - int ret; if (debug_level >= DEBUG_LEVEL_INFO) printk("%s(%d):mgsl_ioctl %s cmd=%08X\n", __FILE__,__LINE__, @@ -2950,10 +2954,7 @@ static int mgsl_ioctl(struct tty_struct *tty, struct file * file, return -EIO; } - lock_kernel(); - ret = mgsl_ioctl_common(info, cmd, arg); - unlock_kernel(); - return ret; + return mgsl_ioctl_common(info, cmd, arg); } static int mgsl_ioctl_common(struct mgsl_struct *info, unsigned int cmd, unsigned long arg) @@ -3109,12 +3110,14 @@ static void mgsl_close(struct tty_struct *tty, struct file * filp) if (tty_port_close_start(&info->port, tty, filp) == 0) goto cleanup; - + + mutex_lock(&info->port.mutex); if (info->port.flags & ASYNC_INITIALIZED) mgsl_wait_until_sent(tty, info->timeout); mgsl_flush_buffer(tty); tty_ldisc_flush(tty); shutdown(info); + mutex_unlock(&info->port.mutex); tty_port_close_end(&info->port, tty); info->port.tty = NULL; @@ -3162,7 +3165,6 @@ static void mgsl_wait_until_sent(struct tty_struct *tty, int timeout) * Note: use tight timings here to satisfy the NIST-PCTS. */ - lock_kernel(); if ( info->params.data_rate ) { char_time = info->timeout/(32 * 5); if (!char_time) @@ -3192,7 +3194,6 @@ static void mgsl_wait_until_sent(struct tty_struct *tty, int timeout) break; } } - unlock_kernel(); exit: if (debug_level >= DEBUG_LEVEL_INFO) @@ -3348,7 +3349,9 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp, printk("%s(%d):block_til_ready blocking on %s count=%d\n", __FILE__,__LINE__, tty->driver->name, port->count ); + tty_unlock(); schedule(); + tty_lock(); } set_current_state(TASK_RUNNING); |