e1000e: cleanup functions that clear hardware statistics

The e1000_clear_hw_cntrs_*() functions read the registers to clear them.
There is no reason to save the register contents so the temp variable can
be removed.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

4 files changed, 116 insertions, 123 deletions

diff --git a/drivers/net/e1000e/82571.c b/drivers/net/e1000e/82571.c
index 468dd7d4fcad..c5dc1b3be230 100644
--- a/drivers/net/e1000e/82571.c
+++ b/drivers/net/e1000e/82571.c
@@ -1613,44 +1613,42 @@ static s32 e1000_fix_nvm_checksum_82571(struct e1000_hw *hw)
  **/
 static void e1000_clear_hw_cntrs_82571(struct e1000_hw *hw)
 {
-        u32 temp;
-
         e1000e_clear_hw_cntrs_base(hw);
 
-        temp = er32(PRC64);
-        temp = er32(PRC127);
-        temp = er32(PRC255);
-        temp = er32(PRC511);
-        temp = er32(PRC1023);
-        temp = er32(PRC1522);
-        temp = er32(PTC64);
-        temp = er32(PTC127);
-        temp = er32(PTC255);
-        temp = er32(PTC511);
-        temp = er32(PTC1023);
-        temp = er32(PTC1522);
-
-        temp = er32(ALGNERRC);
-        temp = er32(RXERRC);
-        temp = er32(TNCRS);
-        temp = er32(CEXTERR);
-        temp = er32(TSCTC);
-        temp = er32(TSCTFC);
-
-        temp = er32(MGTPRC);
-        temp = er32(MGTPDC);
-        temp = er32(MGTPTC);
-
-        temp = er32(IAC);
-        temp = er32(ICRXOC);
-
-        temp = er32(ICRXPTC);
-        temp = er32(ICRXATC);
-        temp = er32(ICTXPTC);
-        temp = er32(ICTXATC);
-        temp = er32(ICTXQEC);
-        temp = er32(ICTXQMTC);
-        temp = er32(ICRXDMTC);
+        er32(PRC64);
+        er32(PRC127);
+        er32(PRC255);
+        er32(PRC511);
+        er32(PRC1023);
+        er32(PRC1522);
+        er32(PTC64);
+        er32(PTC127);
+        er32(PTC255);
+        er32(PTC511);
+        er32(PTC1023);
+        er32(PTC1522);
+
+        er32(ALGNERRC);
+        er32(RXERRC);
+        er32(TNCRS);
+        er32(CEXTERR);
+        er32(TSCTC);
+        er32(TSCTFC);
+
+        er32(MGTPRC);
+        er32(MGTPDC);
+        er32(MGTPTC);
+
+        er32(IAC);
+        er32(ICRXOC);
+
+        er32(ICRXPTC);
+        er32(ICRXATC);
+        er32(ICTXPTC);
+        er32(ICTXATC);
+        er32(ICTXQEC);
+        er32(ICTXQMTC);
+        er32(ICRXDMTC);
 }
 
 static struct e1000_mac_operations e82571_mac_ops = {
diff --git a/drivers/net/e1000e/es2lan.c b/drivers/net/e1000e/es2lan.c
index 795d433e656f..8a089569c6e1 100644
--- a/drivers/net/e1000e/es2lan.c
+++ b/drivers/net/e1000e/es2lan.c
@@ -1304,44 +1304,42 @@ static s32 e1000_write_kmrn_reg_80003es2lan(struct e1000_hw *hw, u32 offset,
  **/
 static void e1000_clear_hw_cntrs_80003es2lan(struct e1000_hw *hw)
 {
-        u32 temp;
-
         e1000e_clear_hw_cntrs_base(hw);
 
-        temp = er32(PRC64);
-        temp = er32(PRC127);
-        temp = er32(PRC255);
-        temp = er32(PRC511);
-        temp = er32(PRC1023);
-        temp = er32(PRC1522);
-        temp = er32(PTC64);
-        temp = er32(PTC127);
-        temp = er32(PTC255);
-        temp = er32(PTC511);
-        temp = er32(PTC1023);
-        temp = er32(PTC1522);
-
-        temp = er32(ALGNERRC);
-        temp = er32(RXERRC);
-        temp = er32(TNCRS);
-        temp = er32(CEXTERR);
-        temp = er32(TSCTC);
-        temp = er32(TSCTFC);
-
-        temp = er32(MGTPRC);
-        temp = er32(MGTPDC);
-        temp = er32(MGTPTC);
-
-        temp = er32(IAC);
-        temp = er32(ICRXOC);
-
-        temp = er32(ICRXPTC);
-        temp = er32(ICRXATC);
-        temp = er32(ICTXPTC);
-        temp = er32(ICTXATC);
-        temp = er32(ICTXQEC);
-        temp = er32(ICTXQMTC);
-        temp = er32(ICRXDMTC);
+        er32(PRC64);
+        er32(PRC127);
+        er32(PRC255);
+        er32(PRC511);
+        er32(PRC1023);
+        er32(PRC1522);
+        er32(PTC64);
+        er32(PTC127);
+        er32(PTC255);
+        er32(PTC511);
+        er32(PTC1023);
+        er32(PTC1522);
+
+        er32(ALGNERRC);
+        er32(RXERRC);
+        er32(TNCRS);
+        er32(CEXTERR);
+        er32(TSCTC);
+        er32(TSCTFC);
+
+        er32(MGTPRC);
+        er32(MGTPDC);
+        er32(MGTPTC);
+
+        er32(IAC);
+        er32(ICRXOC);
+
+        er32(ICRXPTC);
+        er32(ICRXATC);
+        er32(ICTXPTC);
+        er32(ICTXATC);
+        er32(ICTXQEC);
+        er32(ICTXQMTC);
+        er32(ICRXDMTC);
 }
 
 static struct e1000_mac_operations es2_mac_ops = {
diff --git a/drivers/net/e1000e/ich8lan.c b/drivers/net/e1000e/ich8lan.c
index f8ee0f29d237..2c1d08e04436 100644
--- a/drivers/net/e1000e/ich8lan.c
+++ b/drivers/net/e1000e/ich8lan.c
@@ -3402,24 +3402,23 @@ static s32 e1000_get_cfg_done_ich8lan(struct e1000_hw *hw)
  **/
 static void e1000_clear_hw_cntrs_ich8lan(struct e1000_hw *hw)
 {
-        u32 temp;
         u16 phy_data;
 
         e1000e_clear_hw_cntrs_base(hw);
 
-        temp = er32(ALGNERRC);
-        temp = er32(RXERRC);
-        temp = er32(TNCRS);
-        temp = er32(CEXTERR);
-        temp = er32(TSCTC);
-        temp = er32(TSCTFC);
+        er32(ALGNERRC);
+        er32(RXERRC);
+        er32(TNCRS);
+        er32(CEXTERR);
+        er32(TSCTC);
+        er32(TSCTFC);
 
-        temp = er32(MGTPRC);
-        temp = er32(MGTPDC);
-        temp = er32(MGTPTC);
+        er32(MGTPRC);
+        er32(MGTPDC);
+        er32(MGTPTC);
 
-        temp = er32(IAC);
-        temp = er32(ICRXOC);
+        er32(IAC);
+        er32(ICRXOC);
 
         /* Clear PHY statistics registers */
         if ((hw->phy.type == e1000_phy_82578) ||
diff --git a/drivers/net/e1000e/lib.c b/drivers/net/e1000e/lib.c
index d173bf88cc94..f690a1055b41 100644
--- a/drivers/net/e1000e/lib.c
+++ b/drivers/net/e1000e/lib.c
@@ -295,45 +295,43 @@ void e1000e_update_mc_addr_list_generic(struct e1000_hw *hw,
  **/
 void e1000e_clear_hw_cntrs_base(struct e1000_hw *hw)
 {
-        u32 temp;
-
-        temp = er32(CRCERRS);
-        temp = er32(SYMERRS);
-        temp = er32(MPC);
-        temp = er32(SCC);
-        temp = er32(ECOL);
-        temp = er32(MCC);
-        temp = er32(LATECOL);
-        temp = er32(COLC);
-        temp = er32(DC);
-        temp = er32(SEC);
-        temp = er32(RLEC);
-        temp = er32(XONRXC);
-        temp = er32(XONTXC);
-        temp = er32(XOFFRXC);
-        temp = er32(XOFFTXC);
-        temp = er32(FCRUC);
-        temp = er32(GPRC);
-        temp = er32(BPRC);
-        temp = er32(MPRC);
-        temp = er32(GPTC);
-        temp = er32(GORCL);
-        temp = er32(GORCH);
-        temp = er32(GOTCL);
-        temp = er32(GOTCH);
-        temp = er32(RNBC);
-        temp = er32(RUC);
-        temp = er32(RFC);
-        temp = er32(ROC);
-        temp = er32(RJC);
-        temp = er32(TORL);
-        temp = er32(TORH);
-        temp = er32(TOTL);
-        temp = er32(TOTH);
-        temp = er32(TPR);
-        temp = er32(TPT);
-        temp = er32(MPTC);
-        temp = er32(BPTC);
+        er32(CRCERRS);
+        er32(SYMERRS);
+        er32(MPC);
+        er32(SCC);
+        er32(ECOL);
+        er32(MCC);
+        er32(LATECOL);
+        er32(COLC);
+        er32(DC);
+        er32(SEC);
+        er32(RLEC);
+        er32(XONRXC);
+        er32(XONTXC);
+        er32(XOFFRXC);
+        er32(XOFFTXC);
+        er32(FCRUC);
+        er32(GPRC);
+        er32(BPRC);
+        er32(MPRC);
+        er32(GPTC);
+        er32(GORCL);
+        er32(GORCH);
+        er32(GOTCL);
+        er32(GOTCH);
+        er32(RNBC);
+        er32(RUC);
+        er32(RFC);
+        er32(ROC);
+        er32(RJC);
+        er32(TORL);
+        er32(TORH);
+        er32(TOTL);
+        er32(TOTH);
+        er32(TPR);
+        er32(TPT);
+        er32(MPTC);
+        er32(BPTC);
 }
 
 /**