diff options
| author | David Ertman <david.m.ertman@intel.com> | 2014-07-09 20:07:42 +0400 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2014-07-26 07:51:00 +0400 |
| commit | 491a04d2812b0a665bda34ea39875833dc7a1aaf (patch) | |
| tree | dccfd1e8134272c43c712d10f7f83ebadce1b1de /drivers/net | |
| parent | 493004d04f56fd7d642bdbb2938e17e5f7d622d1 (diff) | |
| download | linux-491a04d2812b0a665bda34ea39875833dc7a1aaf.tar.xz | |
e1000e: Add code to check return values on NVM accesses
Adding code to check and respond to previously ignored return values
from NVM access functions.
Issue discovered through static analysis.
Signed-off-by: Dave Ertman <david.m.ertman@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/ethernet/intel/e1000e/manage.c | 5 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/e1000e/netdev.c | 22 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/e1000e/nvm.c | 4 |
3 files changed, 23 insertions, 8 deletions
diff --git a/drivers/net/ethernet/intel/e1000e/manage.c b/drivers/net/ethernet/intel/e1000e/manage.c index cb37ff1f1321..58856032298d 100644 --- a/drivers/net/ethernet/intel/e1000e/manage.c +++ b/drivers/net/ethernet/intel/e1000e/manage.c @@ -327,9 +327,12 @@ bool e1000e_enable_mng_pass_thru(struct e1000_hw *hw) } else if ((hw->mac.type == e1000_82574) || (hw->mac.type == e1000_82583)) { u16 data; + s32 ret_val; factps = er32(FACTPS); - e1000_read_nvm(hw, NVM_INIT_CONTROL2_REG, 1, &data); + ret_val = e1000_read_nvm(hw, NVM_INIT_CONTROL2_REG, 1, &data); + if (ret_val) + return false; if (!(factps & E1000_FACTPS_MNGCG) && ((data & E1000_NVM_INIT_CTRL2_MNGM) == diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c index 201cc93f3625..fe3e42a6c8e9 100644 --- a/drivers/net/ethernet/intel/e1000e/netdev.c +++ b/drivers/net/ethernet/intel/e1000e/netdev.c @@ -6708,6 +6708,7 @@ static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent) int bars, i, err, pci_using_dac; u16 eeprom_data = 0; u16 eeprom_apme_mask = E1000_EEPROM_APME; + s32 rval = 0; if (ei->flags2 & FLAG2_DISABLE_ASPM_L0S) aspm_disable_flag = PCIE_LINK_STATE_L0S; @@ -6940,15 +6941,19 @@ static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent) } else if (adapter->flags & FLAG_APME_IN_CTRL3) { if (adapter->flags & FLAG_APME_CHECK_PORT_B && (adapter->hw.bus.func == 1)) - e1000_read_nvm(&adapter->hw, NVM_INIT_CONTROL3_PORT_B, - 1, &eeprom_data); + rval = e1000_read_nvm(&adapter->hw, + NVM_INIT_CONTROL3_PORT_B, + 1, &eeprom_data); else - e1000_read_nvm(&adapter->hw, NVM_INIT_CONTROL3_PORT_A, - 1, &eeprom_data); + rval = e1000_read_nvm(&adapter->hw, + NVM_INIT_CONTROL3_PORT_A, + 1, &eeprom_data); } /* fetch WoL from EEPROM */ - if (eeprom_data & eeprom_apme_mask) + if (rval) + e_dbg("NVM read error getting WoL initial values: %d\n", rval); + else if (eeprom_data & eeprom_apme_mask) adapter->eeprom_wol |= E1000_WUFC_MAG; /* now that we have the eeprom settings, apply the special cases @@ -6967,7 +6972,12 @@ static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent) device_wakeup_enable(&pdev->dev); /* save off EEPROM version number */ - e1000_read_nvm(&adapter->hw, 5, 1, &adapter->eeprom_vers); + rval = e1000_read_nvm(&adapter->hw, 5, 1, &adapter->eeprom_vers); + + if (rval) { + e_dbg("NVM read error getting EEPROM version: %d\n", rval); + adapter->eeprom_vers = 0; + } /* reset the hardware with the new settings */ e1000e_reset(adapter); diff --git a/drivers/net/ethernet/intel/e1000e/nvm.c b/drivers/net/ethernet/intel/e1000e/nvm.c index b1f212b7baf7..fa6b1036a327 100644 --- a/drivers/net/ethernet/intel/e1000e/nvm.c +++ b/drivers/net/ethernet/intel/e1000e/nvm.c @@ -327,8 +327,10 @@ s32 e1000e_read_nvm_eerd(struct e1000_hw *hw, u16 offset, u16 words, u16 *data) ew32(EERD, eerd); ret_val = e1000e_poll_eerd_eewr_done(hw, E1000_NVM_POLL_READ); - if (ret_val) + if (ret_val) { + e_dbg("NVM read error: %d\n", ret_val); break; + } data[i] = (er32(EERD) >> E1000_NVM_RW_REG_DATA); } |