[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>

1 files changed, 8 insertions, 6 deletions

diff --git a/drivers/char/synclink.c b/drivers/char/synclink.c
index 747eb8d18166..26b421b74bb6 100644
--- 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;