summaryrefslogtreecommitdiff
path: root/drivers/net/e1000/e1000_main.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/net/e1000/e1000_main.c')
-rw-r--r--drivers/net/e1000/e1000_main.c34
1 files changed, 26 insertions, 8 deletions
diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
index 93b861d032b5..a65023d772cb 100644
--- a/drivers/net/e1000/e1000_main.c
+++ b/drivers/net/e1000/e1000_main.c
@@ -2335,6 +2335,12 @@ static void e1000_set_rx_mode(struct net_device *netdev)
int mta_reg_count = (hw->mac_type == e1000_ich8lan) ?
E1000_NUM_MTA_REGISTERS_ICH8LAN :
E1000_NUM_MTA_REGISTERS;
+ u32 *mcarray = kcalloc(mta_reg_count, sizeof(u32), GFP_ATOMIC);
+
+ if (!mcarray) {
+ DPRINTK(PROBE, ERR, "memory allocation failed\n");
+ return;
+ }
if (hw->mac_type == e1000_ich8lan)
rar_entries = E1000_RAR_ENTRIES_ICH8LAN;
@@ -2401,22 +2407,34 @@ static void e1000_set_rx_mode(struct net_device *netdev)
}
WARN_ON(uc_ptr != NULL);
- /* clear the old settings from the multicast hash table */
-
- for (i = 0; i < mta_reg_count; i++) {
- E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
- E1000_WRITE_FLUSH();
- }
-
/* load any remaining addresses into the hash table */
for (; mc_ptr; mc_ptr = mc_ptr->next) {
+ u32 hash_reg, hash_bit, mta;
hash_value = e1000_hash_mc_addr(hw, mc_ptr->da_addr);
- e1000_mta_set(hw, hash_value);
+ hash_reg = (hash_value >> 5) & 0x7F;
+ hash_bit = hash_value & 0x1F;
+ mta = (1 << hash_bit);
+ mcarray[hash_reg] |= mta;
}
+ /* write the hash table completely, write from bottom to avoid
+ * both stupid write combining chipsets, and flushing each write */
+ for (i = mta_reg_count - 1; i >= 0 ; i--) {
+ /*
+ * If we are on an 82544 has an errata where writing odd
+ * offsets overwrites the previous even offset, but writing
+ * backwards over the range solves the issue by always
+ * writing the odd offset first
+ */
+ E1000_WRITE_REG_ARRAY(hw, MTA, i, mcarray[i]);
+ }
+ E1000_WRITE_FLUSH();
+
if (hw->mac_type == e1000_82542_rev2_0)
e1000_leave_82542_rst(adapter);
+
+ kfree(mcarray);
}
/* Need to wait a few seconds after link up to get diagnostic information from