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Code Issues Releases Wiki Activity

e1000e: reduce scope of some variables, remove unnecessary ones

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Static analysis of the driver code found some variables for which the scope
can be reduced, or remove the variable altogether.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Bruce Allan 2011-01-06 07:02:53 +00:00 committed by Jeff Kirsher
parent 67fd4fcb78
commit 90da066925
5 changed files with 31 additions and 33 deletions
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4
drivers/net/e1000e/ethtool.c
View file

@ -1255,7 +1255,6 @@ static int e1000_integrated_phy_loopback(struct e1000_adapter *adapter)
{
struct e1000_hw *hw = &adapter->hw;
u32 ctrl_reg = 0;
u32 stat_reg = 0;
u16 phy_reg = 0;
s32 ret_val = 0;
@ -1363,8 +1362,7 @@ static int e1000_integrated_phy_loopback(struct e1000_adapter *adapter)
* Set the ILOS bit on the fiber Nic if half duplex link is
* detected.
*/
stat_reg = er32(STATUS);
if ((stat_reg & E1000_STATUS_FD) == 0)
if ((er32(STATUS) & E1000_STATUS_FD) == 0)
ctrl_reg |= (E1000_CTRL_ILOS | E1000_CTRL_SLU);
}

3
drivers/net/e1000e/ich8lan.c
View file

@ -2104,7 +2104,6 @@ static s32 e1000_flash_cycle_init_ich8lan(struct e1000_hw *hw)
{
union ich8_hws_flash_status hsfsts;
s32 ret_val = -E1000_ERR_NVM;
s32 i = 0;
hsfsts.regval = er16flash(ICH_FLASH_HSFSTS);
@ -2140,6 +2139,8 @@ static s32 e1000_flash_cycle_init_ich8lan(struct e1000_hw *hw)
ew16flash(ICH_FLASH_HSFSTS, hsfsts.regval);
ret_val = 0;
} else {
s32 i = 0;
/*
* Otherwise poll for sometime so the current
* cycle has a chance to end before giving up.

4
drivers/net/e1000e/lib.c
View file

@ -1978,15 +1978,15 @@ static s32 e1000_ready_nvm_eeprom(struct e1000_hw *hw)
{
struct e1000_nvm_info *nvm = &hw->nvm;
u32 eecd = er32(EECD);
u16 timeout = 0;
u8 spi_stat_reg;
if (nvm->type == e1000_nvm_eeprom_spi) {
u16 timeout = NVM_MAX_RETRY_SPI;
/* Clear SK and CS */
eecd &= ~(E1000_EECD_CS | E1000_EECD_SK);
ew32(EECD, eecd);
udelay(1);
timeout = NVM_MAX_RETRY_SPI;
/*
* Read "Status Register" repeatedly until the LSB is cleared.

45
drivers/net/e1000e/netdev.c
View file

@ -2720,7 +2720,6 @@ static void e1000_setup_rctl(struct e1000_adapter *adapter)
{
struct e1000_hw *hw = &adapter->hw;
u32 rctl, rfctl;
u32 psrctl = 0;
u32 pages = 0;
/* Workaround Si errata on 82579 - configure jumbo frame flow */
@ -2819,6 +2818,8 @@ static void e1000_setup_rctl(struct e1000_adapter *adapter)
adapter->rx_ps_pages = 0;
if (adapter->rx_ps_pages) {
u32 psrctl = 0;
/* Configure extra packet-split registers */
rfctl = er32(RFCTL);
rfctl |= E1000_RFCTL_EXTEN;
@ -3020,7 +3021,6 @@ static void e1000_set_multi(struct net_device *netdev)
struct netdev_hw_addr *ha;
u8 *mta_list;
u32 rctl;
int i;
/* Check for Promiscuous and All Multicast modes */
@ -3043,12 +3043,13 @@ static void e1000_set_multi(struct net_device *netdev)
ew32(RCTL, rctl);
if (!netdev_mc_empty(netdev)) {
int i = 0;
mta_list = kmalloc(netdev_mc_count(netdev) * 6, GFP_ATOMIC);
if (!mta_list)
return;
/* prepare a packed array of only addresses. */
i = 0;
netdev_for_each_mc_addr(ha, netdev)
memcpy(mta_list + (i++ * ETH_ALEN), ha->addr, ETH_ALEN);
@ -3999,10 +4000,11 @@ static void e1000_phy_read_status(struct e1000_adapter *adapter)
{
struct e1000_hw *hw = &adapter->hw;
struct e1000_phy_regs *phy = &adapter->phy_regs;
int ret_val;
if ((er32(STATUS) & E1000_STATUS_LU) &&
(adapter->hw.phy.media_type == e1000_media_type_copper)) {
int ret_val;
ret_val = e1e_rphy(hw, PHY_CONTROL, &phy->bmcr);
ret_val |= e1e_rphy(hw, PHY_STATUS, &phy->bmsr);
ret_val |= e1e_rphy(hw, PHY_AUTONEG_ADV, &phy->advertise);
@ -4148,7 +4150,6 @@ static void e1000_watchdog_task(struct work_struct *work)
struct e1000_ring *tx_ring = adapter->tx_ring;
struct e1000_hw *hw = &adapter->hw;
u32 link, tctl;
int tx_pending = 0;
link = e1000e_has_link(adapter);
if ((netif_carrier_ok(netdev)) && link) {
@ -4302,21 +4303,18 @@ static void e1000_watchdog_task(struct work_struct *work)
e1000e_update_adaptive(&adapter->hw);
if (!netif_carrier_ok(netdev)) {
tx_pending = (e1000_desc_unused(tx_ring) + 1 <
tx_ring->count);
if (tx_pending) {
/*
* We've lost link, so the controller stops DMA,
* but we've got queued Tx work that's never going
* to get done, so reset controller to flush Tx.
* (Do the reset outside of interrupt context).
*/
adapter->tx_timeout_count++;
schedule_work(&adapter->reset_task);
/* return immediately since reset is imminent */
return;
}
if (!netif_carrier_ok(netdev) &&
(e1000_desc_unused(tx_ring) + 1 < tx_ring->count)) {
/*
* We've lost link, so the controller stops DMA,
* but we've got queued Tx work that's never going
* to get done, so reset controller to flush Tx.
* (Do the reset outside of interrupt context).
*/
adapter->tx_timeout_count++;
schedule_work(&adapter->reset_task);
/* return immediately since reset is imminent */
return;
}
/* Simple mode for Interrupt Throttle Rate (ITR) */
@ -4387,13 +4385,13 @@ static int e1000_tso(struct e1000_adapter *adapter,
u32 cmd_length = 0;
u16 ipcse = 0, tucse, mss;
u8 ipcss, ipcso, tucss, tucso, hdr_len;
int err;
if (!skb_is_gso(skb))
return 0;
if (skb_header_cloned(skb)) {
err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
int err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
if (err)
return err;
}
@ -5518,9 +5516,10 @@ static irqreturn_t e1000_intr_msix(int irq, void *data)
{
struct net_device *netdev = data;
struct e1000_adapter *adapter = netdev_priv(netdev);
int vector, msix_irq;
if (adapter->msix_entries) {
int vector, msix_irq;
vector = 0;
msix_irq = adapter->msix_entries[vector].vector;
disable_irq(msix_irq);

8
drivers/net/e1000e/phy.c
View file

@ -2409,9 +2409,7 @@ static u32 e1000_get_phy_addr_for_bm_page(u32 page, u32 reg)
s32 e1000e_write_phy_reg_bm(struct e1000_hw *hw, u32 offset, u16 data)
{
s32 ret_val;
u32 page_select = 0;
u32 page = offset >> IGP_PAGE_SHIFT;
u32 page_shift = 0;
ret_val = hw->phy.ops.acquire(hw);
if (ret_val)
@ -2427,6 +2425,8 @@ s32 e1000e_write_phy_reg_bm(struct e1000_hw *hw, u32 offset, u16 data)
hw->phy.addr = e1000_get_phy_addr_for_bm_page(page, offset);
if (offset > MAX_PHY_MULTI_PAGE_REG) {
u32 page_shift, page_select;
/*
* Page select is register 31 for phy address 1 and 22 for
* phy address 2 and 3. Page select is shifted only for
@ -2468,9 +2468,7 @@ s32 e1000e_write_phy_reg_bm(struct e1000_hw *hw, u32 offset, u16 data)
s32 e1000e_read_phy_reg_bm(struct e1000_hw *hw, u32 offset, u16 *data)
{
s32 ret_val;
u32 page_select = 0;
u32 page = offset >> IGP_PAGE_SHIFT;
u32 page_shift = 0;
ret_val = hw->phy.ops.acquire(hw);
if (ret_val)
@ -2486,6 +2484,8 @@ s32 e1000e_read_phy_reg_bm(struct e1000_hw *hw, u32 offset, u16 *data)
hw->phy.addr = e1000_get_phy_addr_for_bm_page(page, offset);
if (offset > MAX_PHY_MULTI_PAGE_REG) {
u32 page_shift, page_select;
/*
* Page select is register 31 for phy address 1 and 22 for
* phy address 2 and 3. Page select is shifted only for