e100/e1000*/igb*/ixgb*: Add missing read memory barrier

[deliverable/linux.git] / drivers / net / e1000 / e1000_main.c

diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
index 02833af8a0b1d8bbb2953cb353581ede85cb3b9b..5cc39ed289c62234d2f56cd9ad4c1eb841c26b8e 100644 (file)
--- a/drivers/net/e1000/e1000_main.c
+++ b/drivers/net/e1000/e1000_main.c
@@ -3454,6 +3454,7 @@ static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
        while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
               (count < tx_ring->count)) {
                bool cleaned = false;
+               rmb();  /* read buffer_info after eop_desc */
                for ( ; !cleaned; count++) {
                        tx_desc = E1000_TX_DESC(*tx_ring, i);
                        buffer_info = &tx_ring->buffer_info[i];
@@ -3643,6 +3644,7 @@ static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
                if (*work_done >= work_to_do)
                        break;
                (*work_done)++;
+               rmb(); /* read descriptor and rx_buffer_info after status DD */
 
                status = rx_desc->status;
                skb = buffer_info->skb;
@@ -3849,6 +3851,7 @@ static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
                if (*work_done >= work_to_do)
                        break;
                (*work_done)++;
+               rmb(); /* read descriptor and rx_buffer_info after status DD */
 
                status = rx_desc->status;
                skb = buffer_info->skb;