e1000e: cleanup goto statements to exit points without common work

Per ./Documentation/CodingStyle, goto statements are acceptable for the
centralized exiting of functions when there are multiple exit points which
share common work such as cleanup.  When no common work is required for
multiple exit points, the function should just return at these exit points
instead of doing an unnecessary jump to a centralized return.  This patch
cleans up the inappropriate use of goto statements, and removes unnecessary
variables (or move to a smaller scope) where possible as a result of the
cleanups.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 75 insertions, 101 deletions

diff --git a/drivers/net/ethernet/intel/e1000e/ich8lan.c b/drivers/net/ethernet/intel/e1000e/ich8lan.c
index c4d65b841f35..f3282dc5588e 100644
--- a/drivers/net/ethernet/intel/e1000e/ich8lan.c
+++ b/drivers/net/ethernet/intel/e1000e/ich8lan.c
@@ -351,7 +351,7 @@ static s32 e1000_init_phy_params_pchlan(struct e1000_hw *hw)
 		 */
 		ret_val = e1000e_phy_hw_reset_generic(hw);
 		if (ret_val)
-			goto out;
+			return ret_val;
 
 		/* Ungate automatic PHY configuration on non-managed 82579 */
 		if ((hw->mac.type == e1000_pch2lan) &&
@@ -366,7 +366,7 @@ static s32 e1000_init_phy_params_pchlan(struct e1000_hw *hw)
 	default:
 		ret_val = e1000e_get_phy_id(hw);
 		if (ret_val)
-			goto out;
+			return ret_val;
 		if ((phy->id != 0) && (phy->id != PHY_REVISION_MASK))
 			break;
 		/* fall-through */
@@ -377,10 +377,10 @@ static s32 e1000_init_phy_params_pchlan(struct e1000_hw *hw)
 		 */
 		ret_val = e1000_set_mdio_slow_mode_hv(hw);
 		if (ret_val)
-			goto out;
+			return ret_val;
 		ret_val = e1000e_get_phy_id(hw);
 		if (ret_val)
-			goto out;
+			return ret_val;
 		break;
 	}
 	phy->type = e1000e_get_phy_type_from_id(phy->id);
@@ -406,7 +406,6 @@ static s32 e1000_init_phy_params_pchlan(struct e1000_hw *hw)
 		break;
 	}
 
-out:
 	return ret_val;
 }
 
@@ -635,20 +634,18 @@ static s32 e1000_set_eee_pchlan(struct e1000_hw *hw)
 	u16 phy_reg;
 
 	if (hw->phy.type != e1000_phy_82579)
-		goto out;
+		return 0;
 
 	ret_val = e1e_rphy(hw, I82579_LPI_CTRL, &phy_reg);
 	if (ret_val)
-		goto out;
+		return ret_val;
 
 	if (hw->dev_spec.ich8lan.eee_disable)
 		phy_reg &= ~I82579_LPI_CTRL_ENABLE_MASK;
 	else
 		phy_reg |= I82579_LPI_CTRL_ENABLE_MASK;
 
-	ret_val = e1e_wphy(hw, I82579_LPI_CTRL, phy_reg);
-out:
-	return ret_val;
+	return e1e_wphy(hw, I82579_LPI_CTRL, phy_reg);
 }
 
 /**
@@ -672,10 +669,8 @@ static s32 e1000_check_for_copper_link_ich8lan(struct e1000_hw *hw)
 	 * get_link_status flag is set upon receiving a Link Status
 	 * Change or Rx Sequence Error interrupt.
 	 */
-	if (!mac->get_link_status) {
-		ret_val = 0;
-		goto out;
-	}
+	if (!mac->get_link_status)
+		return 0;
 
 	/*
 	 * First we want to see if the MII Status Register reports
@@ -684,16 +679,16 @@ static s32 e1000_check_for_copper_link_ich8lan(struct e1000_hw *hw)
 	 */
 	ret_val = e1000e_phy_has_link_generic(hw, 1, 0, &link);
 	if (ret_val)
-		goto out;
+		return ret_val;
 
 	if (hw->mac.type == e1000_pchlan) {
 		ret_val = e1000_k1_gig_workaround_hv(hw, link);
 		if (ret_val)
-			goto out;
+			return ret_val;
 	}
 
 	if (!link)
-		goto out; /* No link detected */
+		return 0; /* No link detected */
 
 	mac->get_link_status = false;
 
@@ -701,13 +696,13 @@ static s32 e1000_check_for_copper_link_ich8lan(struct e1000_hw *hw)
 	case e1000_pch2lan:
 		ret_val = e1000_k1_workaround_lv(hw);
 		if (ret_val)
-			goto out;
+			return ret_val;
 		/* fall-thru */
 	case e1000_pchlan:
 		if (hw->phy.type == e1000_phy_82578) {
 			ret_val = e1000_link_stall_workaround_hv(hw);
 			if (ret_val)
-				goto out;
+				return ret_val;
 		}
 
 		/*
@@ -737,16 +732,14 @@ static s32 e1000_check_for_copper_link_ich8lan(struct e1000_hw *hw)
 	/* Enable/Disable EEE after link up */
 	ret_val = e1000_set_eee_pchlan(hw);
 	if (ret_val)
-		goto out;
+		return ret_val;
 
 	/*
 	 * If we are forcing speed/duplex, then we simply return since
 	 * we have already determined whether we have link or not.
 	 */
-	if (!mac->autoneg) {
-		ret_val = -E1000_ERR_CONFIG;
-		goto out;
-	}
+	if (!mac->autoneg)
+		return -E1000_ERR_CONFIG;
 
 	/*
 	 * Auto-Neg is enabled.  Auto Speed Detection takes care
@@ -765,7 +758,6 @@ static s32 e1000_check_for_copper_link_ich8lan(struct e1000_hw *hw)
 	if (ret_val)
 		e_dbg("Error configuring flow control\n");
 
-out:
 	return ret_val;
 }
 
@@ -1008,15 +1000,13 @@ static s32 e1000_write_smbus_addr(struct e1000_hw *hw)
 
 	ret_val = e1000_read_phy_reg_hv_locked(hw, HV_SMB_ADDR, &phy_data);
 	if (ret_val)
-		goto out;
+		return ret_val;
 
 	phy_data &= ~HV_SMB_ADDR_MASK;
 	phy_data |= (strap >> E1000_STRAP_SMBUS_ADDRESS_SHIFT);
 	phy_data |= HV_SMB_ADDR_PEC_EN | HV_SMB_ADDR_VALID;
-	ret_val = e1000_write_phy_reg_hv_locked(hw, HV_SMB_ADDR, phy_data);
 
-out:
-	return ret_val;
+	return e1000_write_phy_reg_hv_locked(hw, HV_SMB_ADDR, phy_data);
 }
 
 /**
@@ -1159,12 +1149,12 @@ static s32 e1000_k1_gig_workaround_hv(struct e1000_hw *hw, bool link)
 	bool k1_enable = hw->dev_spec.ich8lan.nvm_k1_enabled;
 
 	if (hw->mac.type != e1000_pchlan)
-		goto out;
+		return 0;
 
 	/* Wrap the whole flow with the sw flag */
 	ret_val = hw->phy.ops.acquire(hw);
 	if (ret_val)
-		goto out;
+		return ret_val;
 
 	/* Disable K1 when link is 1Gbps, otherwise use the NVM setting */
 	if (link) {
@@ -1218,7 +1208,7 @@ static s32 e1000_k1_gig_workaround_hv(struct e1000_hw *hw, bool link)
 
 release:
 	hw->phy.ops.release(hw);
-out:
+
 	return ret_val;
 }
 
@@ -1244,7 +1234,7 @@ s32 e1000_configure_k1_ich8lan(struct e1000_hw *hw, bool k1_enable)
 	                                     E1000_KMRNCTRLSTA_K1_CONFIG,
 	                                     &kmrn_reg);
 	if (ret_val)
-		goto out;
+		return ret_val;
 
 	if (k1_enable)
 		kmrn_reg |= E1000_KMRNCTRLSTA_K1_ENABLE;
@@ -1255,7 +1245,7 @@ s32 e1000_configure_k1_ich8lan(struct e1000_hw *hw, bool k1_enable)
 	                                      E1000_KMRNCTRLSTA_K1_CONFIG,
 	                                      kmrn_reg);
 	if (ret_val)
-		goto out;
+		return ret_val;
 
 	udelay(20);
 	ctrl_ext = er32(CTRL_EXT);
@@ -1273,8 +1263,7 @@ s32 e1000_configure_k1_ich8lan(struct e1000_hw *hw, bool k1_enable)
 	e1e_flush();
 	udelay(20);
 
-out:
-	return ret_val;
+	return 0;
 }
 
 /**
@@ -1376,13 +1365,13 @@ static s32 e1000_hv_phy_workarounds_ich8lan(struct e1000_hw *hw)
 	u16 phy_data;
 
 	if (hw->mac.type != e1000_pchlan)
-		return ret_val;
+		return 0;
 
 	/* Set MDIO slow mode before any other MDIO access */
 	if (hw->phy.type == e1000_phy_82577) {
 		ret_val = e1000_set_mdio_slow_mode_hv(hw);
 		if (ret_val)
-			goto out;
+			return ret_val;
 	}
 
 	if (((hw->phy.type == e1000_phy_82577) &&
@@ -1419,7 +1408,7 @@ static s32 e1000_hv_phy_workarounds_ich8lan(struct e1000_hw *hw)
 	ret_val = e1000e_write_phy_reg_mdic(hw, IGP01E1000_PHY_PAGE_SELECT, 0);
 	hw->phy.ops.release(hw);
 	if (ret_val)
-		goto out;
+		return ret_val;
 
 	/*
 	 * Configure the K1 Si workaround during phy reset assuming there is
@@ -1427,12 +1416,12 @@ static s32 e1000_hv_phy_workarounds_ich8lan(struct e1000_hw *hw)
 	 */
 	ret_val = e1000_k1_gig_workaround_hv(hw, true);
 	if (ret_val)
-		goto out;
+		return ret_val;
 
 	/* Workaround for link disconnects on a busy hub in half duplex */
 	ret_val = hw->phy.ops.acquire(hw);
 	if (ret_val)
-		goto out;
+		return ret_val;
 	ret_val = hw->phy.ops.read_reg_locked(hw, BM_PORT_GEN_CFG, &phy_data);
 	if (ret_val)
 		goto release;
@@ -1440,7 +1429,7 @@ static s32 e1000_hv_phy_workarounds_ich8lan(struct e1000_hw *hw)
 					       phy_data & 0x00FF);
 release:
 	hw->phy.ops.release(hw);
-out:
+
 	return ret_val;
 }
 
@@ -1497,13 +1486,13 @@ s32 e1000_lv_jumbo_workaround_ich8lan(struct e1000_hw *hw, bool enable)
 	u16 i;
 
 	if (hw->mac.type != e1000_pch2lan)
-		goto out;
+		return 0;
 
 	/* disable Rx path while enabling/disabling workaround */
 	e1e_rphy(hw, PHY_REG(769, 20), &phy_reg);
 	ret_val = e1e_wphy(hw, PHY_REG(769, 20), phy_reg | (1 << 14));
 	if (ret_val)
-		goto out;
+		return ret_val;
 
 	if (enable) {
 		/*
@@ -1545,24 +1534,24 @@ s32 e1000_lv_jumbo_workaround_ich8lan(struct e1000_hw *hw, bool enable)
 						E1000_KMRNCTRLSTA_CTRL_OFFSET,
 						&data);
 		if (ret_val)
-			goto out;
+			return ret_val;
 		ret_val = e1000e_write_kmrn_reg(hw,
 						E1000_KMRNCTRLSTA_CTRL_OFFSET,
 						data | (1 << 0));
 		if (ret_val)
-			goto out;
+			return ret_val;
 		ret_val = e1000e_read_kmrn_reg(hw,
 						E1000_KMRNCTRLSTA_HD_CTRL,
 						&data);
 		if (ret_val)
-			goto out;
+			return ret_val;
 		data &= ~(0xF << 8);
 		data |= (0xB << 8);
 		ret_val = e1000e_write_kmrn_reg(hw,
 						E1000_KMRNCTRLSTA_HD_CTRL,
 						data);
 		if (ret_val)
-			goto out;
+			return ret_val;
 
 		/* Enable jumbo frame workaround in the PHY */
 		e1e_rphy(hw, PHY_REG(769, 23), &data);
@@ -1570,25 +1559,25 @@ s32 e1000_lv_jumbo_workaround_ich8lan(struct e1000_hw *hw, bool enable)
 		data |= (0x37 << 5);
 		ret_val = e1e_wphy(hw, PHY_REG(769, 23), data);
 		if (ret_val)
-			goto out;
+			return ret_val;
 		e1e_rphy(hw, PHY_REG(769, 16), &data);
 		data &= ~(1 << 13);
 		ret_val = e1e_wphy(hw, PHY_REG(769, 16), data);
 		if (ret_val)
-			goto out;
+			return ret_val;
 		e1e_rphy(hw, PHY_REG(776, 20), &data);
 		data &= ~(0x3FF << 2);
 		data |= (0x1A << 2);
 		ret_val = e1e_wphy(hw, PHY_REG(776, 20), data);
 		if (ret_val)
-			goto out;
+			return ret_val;
 		ret_val = e1e_wphy(hw, PHY_REG(776, 23), 0xF100);
 		if (ret_val)
-			goto out;
+			return ret_val;
 		e1e_rphy(hw, HV_PM_CTRL, &data);
 		ret_val = e1e_wphy(hw, HV_PM_CTRL, data | (1 << 10));
 		if (ret_val)
-			goto out;
+			return ret_val;
 	} else {
 		/* Write MAC register values back to h/w defaults */
 		mac_reg = er32(FFLT_DBG);
@@ -1603,56 +1592,53 @@ s32 e1000_lv_jumbo_workaround_ich8lan(struct e1000_hw *hw, bool enable)
 						E1000_KMRNCTRLSTA_CTRL_OFFSET,
 						&data);
 		if (ret_val)
-			goto out;
+			return ret_val;
 		ret_val = e1000e_write_kmrn_reg(hw,
 						E1000_KMRNCTRLSTA_CTRL_OFFSET,
 						data & ~(1 << 0));
 		if (ret_val)
-			goto out;
+			return ret_val;
 		ret_val = e1000e_read_kmrn_reg(hw,
 						E1000_KMRNCTRLSTA_HD_CTRL,
 						&data);
 		if (ret_val)
-			goto out;
+			return ret_val;
 		data &= ~(0xF << 8);
 		data |= (0xB << 8);
 		ret_val = e1000e_write_kmrn_reg(hw,
 						E1000_KMRNCTRLSTA_HD_CTRL,
 						data);
 		if (ret_val)
-			goto out;
+			return ret_val;
 
 		/* Write PHY register values back to h/w defaults */
 		e1e_rphy(hw, PHY_REG(769, 23), &data);
 		data &= ~(0x7F << 5);
 		ret_val = e1e_wphy(hw, PHY_REG(769, 23), data);
 		if (ret_val)
-			goto out;
+			return ret_val;
 		e1e_rphy(hw, PHY_REG(769, 16), &data);
 		data |= (1 << 13);
 		ret_val = e1e_wphy(hw, PHY_REG(769, 16), data);
 		if (ret_val)
-			goto out;
+			return ret_val;
 		e1e_rphy(hw, PHY_REG(776, 20), &data);
 		data &= ~(0x3FF << 2);
 		data |= (0x8 << 2);
 		ret_val = e1e_wphy(hw, PHY_REG(776, 20), data);
 		if (ret_val)
-			goto out;
+			return ret_val;
 		ret_val = e1e_wphy(hw, PHY_REG(776, 23), 0x7E00);
 		if (ret_val)
-			goto out;
+			return ret_val;
 		e1e_rphy(hw, HV_PM_CTRL, &data);
 		ret_val = e1e_wphy(hw, HV_PM_CTRL, data & ~(1 << 10));
 		if (ret_val)
-			goto out;
+			return ret_val;
 	}
 
 	/* re-enable Rx path after enabling/disabling workaround */
-	ret_val = e1e_wphy(hw, PHY_REG(769, 20), phy_reg & ~(1 << 14));
-
-out:
-	return ret_val;
+	return e1e_wphy(hw, PHY_REG(769, 20), phy_reg & ~(1 << 14));
 }
 
 /**
@@ -1664,14 +1650,14 @@ static s32 e1000_lv_phy_workarounds_ich8lan(struct e1000_hw *hw)
 	s32 ret_val = 0;
 
 	if (hw->mac.type != e1000_pch2lan)
-		goto out;
+		return 0;
 
 	/* Set MDIO slow mode before any other MDIO access */
 	ret_val = e1000_set_mdio_slow_mode_hv(hw);
 
 	ret_val = hw->phy.ops.acquire(hw);
 	if (ret_val)
-		goto out;
+		return ret_val;
 	ret_val = hw->phy.ops.write_reg_locked(hw, I82579_EMI_ADDR,
 					       I82579_MSE_THRESHOLD);
 	if (ret_val)
@@ -1689,7 +1675,6 @@ static s32 e1000_lv_phy_workarounds_ich8lan(struct e1000_hw *hw)
 release:
 	hw->phy.ops.release(hw);
 
-out:
 	return ret_val;
 }
 
@@ -1707,12 +1692,12 @@ static s32 e1000_k1_workaround_lv(struct e1000_hw *hw)
 	u16 phy_reg;
 
 	if (hw->mac.type != e1000_pch2lan)
-		goto out;
+		return 0;
 
 	/* Set K1 beacon duration based on 1Gbps speed or otherwise */
 	ret_val = e1e_rphy(hw, HV_M_STATUS, &status_reg);
 	if (ret_val)
-		goto out;
+		return ret_val;
 
 	if ((status_reg & (HV_M_STATUS_LINK_UP | HV_M_STATUS_AUTONEG_COMPLETE))
 	    == (HV_M_STATUS_LINK_UP | HV_M_STATUS_AUTONEG_COMPLETE)) {
@@ -1721,7 +1706,7 @@ static s32 e1000_k1_workaround_lv(struct e1000_hw *hw)
 
 		ret_val = e1e_rphy(hw, I82579_LPI_CTRL, &phy_reg);
 		if (ret_val)
-			goto out;
+			return ret_val;
 
 		if (status_reg & HV_M_STATUS_SPEED_1000) {
 			mac_reg |= E1000_FEXTNVM4_BEACON_DURATION_8USEC;
@@ -1734,7 +1719,6 @@ static s32 e1000_k1_workaround_lv(struct e1000_hw *hw)
 		ret_val = e1e_wphy(hw, I82579_LPI_CTRL, phy_reg);
 	}
 
-out:
 	return ret_val;
 }
 
@@ -1805,7 +1789,7 @@ static s32 e1000_post_phy_reset_ich8lan(struct e1000_hw *hw)
 	u16 reg;
 
 	if (e1000_check_reset_block(hw))
-		goto out;
+		return 0;
 
 	/* Allow time for h/w to get to quiescent state after reset */
 	usleep_range(10000, 20000);
@@ -1815,12 +1799,12 @@ static s32 e1000_post_phy_reset_ich8lan(struct e1000_hw *hw)
 	case e1000_pchlan:
 		ret_val = e1000_hv_phy_workarounds_ich8lan(hw);
 		if (ret_val)
-			goto out;
+			return ret_val;
 		break;
 	case e1000_pch2lan:
 		ret_val = e1000_lv_phy_workarounds_ich8lan(hw);
 		if (ret_val)
-			goto out;
+			return ret_val;
 		break;
 	default:
 		break;
@@ -1836,7 +1820,7 @@ static s32 e1000_post_phy_reset_ich8lan(struct e1000_hw *hw)
 	/* Configure the LCD with the extended configuration region in NVM */
 	ret_val = e1000_sw_lcd_config_ich8lan(hw);
 	if (ret_val)
-		goto out;
+		return ret_val;
 
 	/* Configure the LCD with the OEM bits in NVM */
 	ret_val = e1000_oem_bits_config_ich8lan(hw, true);
@@ -1851,18 +1835,16 @@ static s32 e1000_post_phy_reset_ich8lan(struct e1000_hw *hw)
 		/* Set EEE LPI Update Timer to 200usec */
 		ret_val = hw->phy.ops.acquire(hw);
 		if (ret_val)
-			goto out;
+			return ret_val;
 		ret_val = hw->phy.ops.write_reg_locked(hw, I82579_EMI_ADDR,
 						       I82579_LPI_UPDATE_TIMER);
-		if (ret_val)
-			goto release;
-		ret_val = hw->phy.ops.write_reg_locked(hw, I82579_EMI_DATA,
-						       0x1387);
-release:
+		if (!ret_val)
+			ret_val = hw->phy.ops.write_reg_locked(hw,
+							       I82579_EMI_DATA,
+							       0x1387);
 		hw->phy.ops.release(hw);
 	}
 
-out:
 	return ret_val;
 }
 
@@ -1885,12 +1867,9 @@ static s32 e1000_phy_hw_reset_ich8lan(struct e1000_hw *hw)
 
 	ret_val = e1000e_phy_hw_reset_generic(hw);
 	if (ret_val)
-		goto out;
-
-	ret_val = e1000_post_phy_reset_ich8lan(hw);
+		return ret_val;
 
-out:
-	return ret_val;
+	return e1000_post_phy_reset_ich8lan(hw);
 }
 
 /**
@@ -1911,7 +1890,7 @@ static s32 e1000_set_lplu_state_pchlan(struct e1000_hw *hw, bool active)
 
 	ret_val = e1e_rphy(hw, HV_OEM_BITS, &oem_reg);
 	if (ret_val)
-		goto out;
+		return ret_val;
 
 	if (active)
 		oem_reg |= HV_OEM_BITS_LPLU;
@@ -1921,10 +1900,7 @@ static s32 e1000_set_lplu_state_pchlan(struct e1000_hw *hw, bool active)
 	if (!e1000_check_reset_block(hw))
 		oem_reg |= HV_OEM_BITS_RESTART_AN;
 
-	ret_val = e1e_wphy(hw, HV_OEM_BITS, oem_reg);
-
-out:
-	return ret_val;
+	return e1e_wphy(hw, HV_OEM_BITS, oem_reg);
 }
 
 /**
@@ -3001,7 +2977,7 @@ static s32 e1000_id_led_init_pchlan(struct e1000_hw *hw)
 	/* Get default ID LED modes */
 	ret_val = hw->nvm.ops.valid_led_default(hw, &data);
 	if (ret_val)
-		goto out;
+		return ret_val;
 
 	mac->ledctl_default = er32(LEDCTL);
 	mac->ledctl_mode1 = mac->ledctl_default;
@@ -3046,8 +3022,7 @@ static s32 e1000_id_led_init_pchlan(struct e1000_hw *hw)
 		}
 	}
 
-out:
-	return ret_val;
+	return 0;
 }
 
 /**
@@ -3162,11 +3137,11 @@ static s32 e1000_reset_hw_ich8lan(struct e1000_hw *hw)
 	if (ctrl & E1000_CTRL_PHY_RST) {
 		ret_val = hw->phy.ops.get_cfg_done(hw);
 		if (ret_val)
-			goto out;
+			return ret_val;
 
 		ret_val = e1000_post_phy_reset_ich8lan(hw);
 		if (ret_val)
-			goto out;
+			return ret_val;
 	}
 
 	/*
@@ -3184,8 +3159,7 @@ static s32 e1000_reset_hw_ich8lan(struct e1000_hw *hw)
 	kab |= E1000_KABGTXD_BGSQLBIAS;
 	ew32(KABGTXD, kab);
 
-out:
-	return ret_val;
+	return 0;
 }
 
 /**