[PATCH] synclink.c: add clear stats

Add the ability to clear statistics.

Signed-off-by: Paul Fulghum <paulkf@microgate.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/drivers/char/synclink.c b/drivers/char/synclink.c
index 747eb8d..26b421b 100644 (file)
--- a/drivers/char/synclink.c
+++ b/drivers/char/synclink.c
@@ -1814,6 +1814,8 @@ static int startup(struct mgsl_struct * info)
 
        info->pending_bh = 0;
        
+       memset(&info->icount, 0, sizeof(info->icount));
+
        init_timer(&info->tx_timer);
        info->tx_timer.data = (unsigned long)info;
        info->tx_timer.function = mgsl_tx_timeout;
@@ -2470,12 +2472,12 @@ static int mgsl_get_stats(struct mgsl_struct * info, struct mgsl_icount __user *
                printk("%s(%d):mgsl_get_params(%s)\n",
                         __FILE__,__LINE__, info->device_name);
                        
-       COPY_TO_USER(err,user_icount, &info->icount, sizeof(struct mgsl_icount));
-       if (err) {
-               if ( debug_level >= DEBUG_LEVEL_INFO )
-                       printk( "%s(%d):mgsl_get_stats(%s) user buffer copy failed\n",
-                               __FILE__,__LINE__,info->device_name);
-               return -EFAULT;
+       if (!user_icount) {
+               memset(&info->icount, 0, sizeof(info->icount));
+       } else {
+               COPY_TO_USER(err, user_icount, &info->icount, sizeof(struct mgsl_icount));
+               if (err)
+                       return -EFAULT;
        }
        
        return 0;