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[e1000] Remove unused variable when ICR register is simply cleared

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On reset and close, the ICR register is read to clear any pending
interrupts, but the value is simply ignored.  Avoid assigning the
value to a variable, to inhibit a warning from gcc 4.6.

Also fix a potential race condition in reset routines which clear
interrupts before disabling them.

Reported-by: Ralph Giles <giles@thaumas.net>
Tested-by: Ralph Giles <giles@thaumas.net>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2011-03-16 18:58:52 +00:00
parent d94e62ded4
commit c018d57803
12 changed files with 24 additions and 30 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
src/drivers/net/e1000/e1000_82540.c
View File

@@ -271,7 +271,7 @@ void e1000_init_function_pointers_82540(struct e1000_hw *hw)
**/
static s32 e1000_reset_hw_82540(struct e1000_hw *hw)
{
u32 ctrl, icr, manc;
u32 ctrl, manc;
s32 ret_val = E1000_SUCCESS;
DEBUGFUNC("e1000_reset_hw_82540");
@@ -316,7 +316,7 @@ static s32 e1000_reset_hw_82540(struct e1000_hw *hw)
E1000_WRITE_REG(hw, E1000_MANC, manc);
E1000_WRITE_REG(hw, E1000_IMC, 0xffffffff);
icr = E1000_READ_REG(hw, E1000_ICR);
E1000_READ_REG(hw, E1000_ICR);
return ret_val;
}

4
src/drivers/net/e1000/e1000_82541.c
View File

@@ -304,7 +304,7 @@ void e1000_init_function_pointers_82541(struct e1000_hw *hw)
**/
static s32 e1000_reset_hw_82541(struct e1000_hw *hw)
{
u32 ledctl, ctrl, icr, manc;
u32 ledctl, ctrl, manc;
DEBUGFUNC("e1000_reset_hw_82541");
@@ -368,7 +368,7 @@ static s32 e1000_reset_hw_82541(struct e1000_hw *hw)
E1000_WRITE_REG(hw, E1000_IMC, 0xFFFFFFFF);
/* Clear any pending interrupt events. */
icr = E1000_READ_REG(hw, E1000_ICR);
E1000_READ_REG(hw, E1000_ICR);
return E1000_SUCCESS;
}

4
src/drivers/net/e1000/e1000_82542.c
View File

@@ -186,7 +186,7 @@ static s32 e1000_reset_hw_82542(struct e1000_hw *hw)
{
struct e1000_bus_info *bus = &hw->bus;
s32 ret_val = E1000_SUCCESS;
u32 ctrl, icr;
u32 ctrl;
DEBUGFUNC("e1000_reset_hw_82542");
@@ -217,7 +217,7 @@ static s32 e1000_reset_hw_82542(struct e1000_hw *hw)
msec_delay(2);
E1000_WRITE_REG(hw, E1000_IMC, 0xffffffff);
icr = E1000_READ_REG(hw, E1000_ICR);
E1000_READ_REG(hw, E1000_ICR);
if (hw->revision_id == E1000_REVISION_2) {
if (bus->pci_cmd_word & CMD_MEM_WRT_INVALIDATE)

4
src/drivers/net/e1000/e1000_82543.c
View File

@@ -907,7 +907,7 @@ static s32 e1000_phy_hw_reset_82543(struct e1000_hw *hw)
**/
static s32 e1000_reset_hw_82543(struct e1000_hw *hw)
{
u32 ctrl, icr;
u32 ctrl;
s32 ret_val = E1000_SUCCESS;
DEBUGFUNC("e1000_reset_hw_82543");
@@ -949,7 +949,7 @@ static s32 e1000_reset_hw_82543(struct e1000_hw *hw)
/* Masking off and clearing any pending interrupts */
E1000_WRITE_REG(hw, E1000_IMC, 0xffffffff);
icr = E1000_READ_REG(hw, E1000_ICR);
E1000_READ_REG(hw, E1000_ICR);
return ret_val;
}

6
src/drivers/net/e1000/e1000_main.c
View File

@@ -554,14 +554,12 @@ static void e1000_close ( struct net_device *netdev )
struct e1000_adapter *adapter = netdev_priv ( netdev );
struct e1000_hw *hw = &adapter->hw;
uint32_t rctl;
uint32_t icr;
DBG ( "e1000_close\n" );
/* Acknowledge interrupts */
icr = E1000_READ_REG ( hw, E1000_ICR );
/* Disable and acknowledge interrupts */
e1000_irq_disable ( adapter );
E1000_READ_REG ( hw, E1000_ICR );
/* disable receives */
rctl = E1000_READ_REG ( hw, E1000_RCTL );