tg3: Workaround tagged status update bug

On rare occasions, writing the tag to the interrupt mailbox does not
reenable interrupts.  This patch fixes the problem by reissuing the
mailbox update.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Reviewed-by: Benjamin Li <benli@broadcom.com>
Signed-off-by: David S. Miller <davem@conan.davemloft.net>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/net/tg3.h b/drivers/net/tg3.h
index 5b3d2f34da7a..3c113c1e9d35 100644
--- a/drivers/net/tg3.h
+++ b/drivers/net/tg3.h
@@ -2800,6 +2800,7 @@ struct tg3_napi {
         struct tg3                      *tp;
         struct tg3_hw_status            *hw_status;
 
+        u32                             chk_msi_cnt;
         u32                             last_tag;
         u32                             last_irq_tag;
         u32                             int_mbox;
@@ -2807,6 +2808,7 @@ struct tg3_napi {
 
         u32                             consmbox ____cacheline_aligned;
         u32                             rx_rcb_ptr;
+        u32                             last_rx_cons;
         u16                             *rx_rcb_prod_idx;
         struct tg3_rx_prodring_set      prodring;
         struct tg3_rx_buffer_desc       *rx_rcb;
@@ -2814,6 +2816,7 @@ struct tg3_napi {
         u32                             tx_prod ____cacheline_aligned;
         u32                             tx_cons;
         u32                             tx_pending;
+        u32                             last_tx_cons;
         u32                             prodmbox;
         struct tg3_tx_buffer_desc       *tx_ring;
         struct ring_info                *tx_buffers;