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path: root/drivers/char/synclinkmp.c
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Diffstat (limited to 'drivers/char/synclinkmp.c')
-rw-r--r--drivers/char/synclinkmp.c43
1 files changed, 22 insertions, 21 deletions
diff --git a/drivers/char/synclinkmp.c b/drivers/char/synclinkmp.c
index 2b18adc..e56caf7 100644
--- a/drivers/char/synclinkmp.c
+++ b/drivers/char/synclinkmp.c
@@ -52,7 +52,6 @@
#include <linux/mm.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
-#include <linux/smp_lock.h>
#include <linux/netdevice.h>
#include <linux/vmalloc.h>
#include <linux/init.h>
@@ -813,13 +812,15 @@ static void 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)
wait_until_sent(tty, info->timeout);
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;
@@ -835,6 +836,7 @@ cleanup:
static void hangup(struct tty_struct *tty)
{
SLMP_INFO *info = tty->driver_data;
+ unsigned long flags;
if (debug_level >= DEBUG_LEVEL_INFO)
printk("%s(%d):%s hangup()\n",
@@ -843,12 +845,16 @@ static void hangup(struct tty_struct *tty)
if (sanity_check(info, tty->name, "hangup"))
return;
+ mutex_lock(&info->port.mutex);
flush_buffer(tty);
shutdown(info);
+ spin_lock_irqsave(&info->port.lock, flags);
info->port.count = 0;
info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
info->port.tty = NULL;
+ spin_unlock_irqrestore(&info->port.lock, flags);
+ mutex_unlock(&info->port.mutex);
wake_up_interruptible(&info->port.open_wait);
}
@@ -1062,9 +1068,7 @@ static void wait_until_sent(struct tty_struct *tty, int timeout)
if (sanity_check(info, tty->name, "wait_until_sent"))
return;
- lock_kernel();
-
- if (!(info->port.flags & ASYNC_INITIALIZED))
+ if (!test_bit(ASYNCB_INITIALIZED, &info->port.flags))
goto exit;
orig_jiffies = jiffies;
@@ -1094,8 +1098,10 @@ static void wait_until_sent(struct tty_struct *tty, int timeout)
break;
}
} else {
- //TODO: determine if there is something similar to USC16C32
- // TXSTATUS_ALL_SENT status
+ /*
+ * TODO: determine if there is something similar to USC16C32
+ * TXSTATUS_ALL_SENT status
+ */
while ( info->tx_active && info->tx_enabled) {
msleep_interruptible(jiffies_to_msecs(char_time));
if (signal_pending(current))
@@ -1106,7 +1112,6 @@ static void wait_until_sent(struct tty_struct *tty, int timeout)
}
exit:
- unlock_kernel();
if (debug_level >= DEBUG_LEVEL_INFO)
printk("%s(%d):%s wait_until_sent() exit\n",
__FILE__,__LINE__, info->device_name );
@@ -1122,7 +1127,6 @@ static int write_room(struct tty_struct *tty)
if (sanity_check(info, tty->name, "write_room"))
return 0;
- lock_kernel();
if (info->params.mode == MGSL_MODE_HDLC) {
ret = (info->tx_active) ? 0 : HDLC_MAX_FRAME_SIZE;
} else {
@@ -1130,7 +1134,6 @@ static int write_room(struct tty_struct *tty)
if (ret < 0)
ret = 0;
}
- unlock_kernel();
if (debug_level >= DEBUG_LEVEL_INFO)
printk("%s(%d):%s write_room()=%d\n",
@@ -1251,7 +1254,7 @@ static void tx_release(struct tty_struct *tty)
*
* Return Value: 0 if success, otherwise error code
*/
-static int do_ioctl(struct tty_struct *tty, struct file *file,
+static int ioctl(struct tty_struct *tty, struct file *file,
unsigned int cmd, unsigned long arg)
{
SLMP_INFO *info = tty->driver_data;
@@ -1341,16 +1344,6 @@ static int do_ioctl(struct tty_struct *tty, struct file *file,
return 0;
}
-static int ioctl(struct tty_struct *tty, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- int ret;
- lock_kernel();
- ret = do_ioctl(tty, file, cmd, arg);
- unlock_kernel();
- return ret;
-}
-
/*
* /proc fs routines....
*/
@@ -2883,7 +2876,9 @@ static int get_stats(SLMP_INFO * info, struct mgsl_icount __user *user_icount)
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;
}
@@ -2898,7 +2893,9 @@ static int get_params(SLMP_INFO * info, MGSL_PARAMS __user *user_params)
printk("%s(%d):%s get_params()\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):%s get_params() user buffer copy failed\n",
@@ -2926,11 +2923,13 @@ static int set_params(SLMP_INFO * info, MGSL_PARAMS __user *new_params)
return -EFAULT;
}
+ mutex_lock(&info->port.mutex);
spin_lock_irqsave(&info->lock,flags);
memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS));
spin_unlock_irqrestore(&info->lock,flags);
change_params(info);
+ mutex_unlock(&info->port.mutex);
return 0;
}
@@ -3366,7 +3365,9 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
printk("%s(%d):%s block_til_ready() count=%d\n",
__FILE__,__LINE__, tty->driver->name, port->count );
+ tty_unlock();
schedule();
+ tty_lock();
}
set_current_state(TASK_RUNNING);
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