sky2: debug interface

Add an optional debug interface for displaying state of transmit/receive
rings. Creates a file debugfs/sky2/ethX for each device that is up.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/net/sky2.h b/drivers/net/sky2.h
index 8df4643493d1..dce4d276d443 100644
--- a/drivers/net/sky2.h
+++ b/drivers/net/sky2.h
@@ -1998,6 +1998,7 @@ struct sky2_port {
         struct sky2_tx_le    *tx_le;
         u16                  tx_cons;           /* next le to check */
         u16                  tx_prod;           /* next le to use */
+        u16                  tx_next;           /* debug only */
         u32                  tx_addr64;
         u16                  tx_pending;
         u16                  tx_last_mss;
@@ -2028,6 +2029,9 @@ struct sky2_port {
         enum flow_control    flow_mode;
         enum flow_control    flow_status;
 
+#ifdef CONFIG_SKY2_DEBUG
+        struct dentry        *debugfs;
+#endif
         struct net_device_stats net_stats;
 
 };