[PATCH] synclinkmp.c: add statistics clear

Add 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/synclinkmp.c b/drivers/char/synclinkmp.c
index d55dbf1f9e18..eb31a3b865df 100644
--- a/drivers/char/synclinkmp.c
+++ b/drivers/char/synclinkmp.c
@@ -2748,6 +2748,8 @@ static int startup(SLMP_INFO * info)
 
         info->pending_bh = 0;
 
+        memset(&info->icount, 0, sizeof(info->icount));
+
         /* program hardware for current parameters */
         reset_port(info);
 
@@ -2951,12 +2953,12 @@ static int get_stats(SLMP_INFO * info, struct mgsl_icount __user *user_icount)
                 printk("%s(%d):%s get_params()\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):%s get_stats() 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;