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, 88 insertions, 122 deletions

diff --git a/drivers/net/ethernet/intel/e1000e/phy.c b/drivers/net/ethernet/intel/e1000e/phy.c
index 0e86c7e761ea..d4dbbe741246 100644
--- a/drivers/net/ethernet/intel/e1000e/phy.c
+++ b/drivers/net/ethernet/intel/e1000e/phy.c
@@ -133,29 +133,29 @@ s32 e1000e_get_phy_id(struct e1000_hw *hw)
 	u16 retry_count = 0;
 
 	if (!phy->ops.read_reg)
-		goto out;
+		return 0;
 
 	while (retry_count < 2) {
 		ret_val = e1e_rphy(hw, PHY_ID1, &phy_id);
 		if (ret_val)
-			goto out;
+			return ret_val;
 
 		phy->id = (u32)(phy_id << 16);
 		udelay(20);
 		ret_val = e1e_rphy(hw, PHY_ID2, &phy_id);
 		if (ret_val)
-			goto out;
+			return ret_val;
 
 		phy->id |= (u32)(phy_id & PHY_REVISION_MASK);
 		phy->revision = (u32)(phy_id & ~PHY_REVISION_MASK);
 
 		if (phy->id != 0 && phy->id != PHY_REVISION_MASK)
-			goto out;
+			return 0;
 
 		retry_count++;
 	}
-out:
-	return ret_val;
+
+	return 0;
 }
 
 /**
@@ -383,28 +383,24 @@ static s32 __e1000e_read_phy_reg_igp(struct e1000_hw *hw, u32 offset, u16 *data,
 
 	if (!locked) {
 		if (!hw->phy.ops.acquire)
-			goto out;
+			return 0;
 
 		ret_val = hw->phy.ops.acquire(hw);
 		if (ret_val)
-			goto out;
+			return ret_val;
 	}
 
-	if (offset > MAX_PHY_MULTI_PAGE_REG) {
+	if (offset > MAX_PHY_MULTI_PAGE_REG)
 		ret_val = e1000e_write_phy_reg_mdic(hw,
 						    IGP01E1000_PHY_PAGE_SELECT,
 						    (u16)offset);
-		if (ret_val)
-			goto release;
-	}
-
-	ret_val = e1000e_read_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & offset,
-	                                  data);
-
-release:
+	if (!ret_val)
+		ret_val = e1000e_read_phy_reg_mdic(hw,
+						   MAX_PHY_REG_ADDRESS & offset,
+						   data);
 	if (!locked)
 		hw->phy.ops.release(hw);
-out:
+
 	return ret_val;
 }
 
@@ -454,29 +450,24 @@ static s32 __e1000e_write_phy_reg_igp(struct e1000_hw *hw, u32 offset, u16 data,
 
 	if (!locked) {
 		if (!hw->phy.ops.acquire)
-			goto out;
+			return 0;
 
 		ret_val = hw->phy.ops.acquire(hw);
 		if (ret_val)
-			goto out;
+			return ret_val;
 	}
 
-	if (offset > MAX_PHY_MULTI_PAGE_REG) {
+	if (offset > MAX_PHY_MULTI_PAGE_REG)
 		ret_val = e1000e_write_phy_reg_mdic(hw,
 						    IGP01E1000_PHY_PAGE_SELECT,
 						    (u16)offset);
-		if (ret_val)
-			goto release;
-	}
-
-	ret_val = e1000e_write_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & offset,
-					    data);
-
-release:
+	if (!ret_val)
+		ret_val = e1000e_write_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS &
+							offset,
+						    data);
 	if (!locked)
 		hw->phy.ops.release(hw);
 
-out:
 	return ret_val;
 }
 
@@ -523,15 +514,16 @@ static s32 __e1000_read_kmrn_reg(struct e1000_hw *hw, u32 offset, u16 *data,
                                  bool locked)
 {
 	u32 kmrnctrlsta;
-	s32 ret_val = 0;
 
 	if (!locked) {
+		s32 ret_val = 0;
+
 		if (!hw->phy.ops.acquire)
-			goto out;
+			return 0;
 
 		ret_val = hw->phy.ops.acquire(hw);
 		if (ret_val)
-			goto out;
+			return ret_val;
 	}
 
 	kmrnctrlsta = ((offset << E1000_KMRNCTRLSTA_OFFSET_SHIFT) &
@@ -547,8 +539,7 @@ static s32 __e1000_read_kmrn_reg(struct e1000_hw *hw, u32 offset, u16 *data,
 	if (!locked)
 		hw->phy.ops.release(hw);
 
-out:
-	return ret_val;
+	return 0;
 }
 
 /**
@@ -596,15 +587,16 @@ static s32 __e1000_write_kmrn_reg(struct e1000_hw *hw, u32 offset, u16 data,
                                   bool locked)
 {
 	u32 kmrnctrlsta;
-	s32 ret_val = 0;
 
 	if (!locked) {
+		s32 ret_val = 0;
+
 		if (!hw->phy.ops.acquire)
-			goto out;
+			return 0;
 
 		ret_val = hw->phy.ops.acquire(hw);
 		if (ret_val)
-			goto out;
+			return ret_val;
 	}
 
 	kmrnctrlsta = ((offset << E1000_KMRNCTRLSTA_OFFSET_SHIFT) &
@@ -617,8 +609,7 @@ static s32 __e1000_write_kmrn_reg(struct e1000_hw *hw, u32 offset, u16 data,
 	if (!locked)
 		hw->phy.ops.release(hw);
 
-out:
-	return ret_val;
+	return 0;
 }
 
 /**
@@ -663,17 +654,14 @@ s32 e1000_copper_link_setup_82577(struct e1000_hw *hw)
 	/* Enable CRS on Tx. This must be set for half-duplex operation. */
 	ret_val = e1e_rphy(hw, I82577_CFG_REG, &phy_data);
 	if (ret_val)
-		goto out;
+		return ret_val;
 
 	phy_data |= I82577_CFG_ASSERT_CRS_ON_TX;
 
 	/* Enable downshift */
 	phy_data |= I82577_CFG_ENABLE_DOWNSHIFT;
 
-	ret_val = e1e_wphy(hw, I82577_CFG_REG, phy_data);
-
-out:
-	return ret_val;
+	return e1e_wphy(hw, I82577_CFG_REG, phy_data);
 }
 
 /**
@@ -1397,25 +1385,25 @@ s32 e1000_phy_force_speed_duplex_ife(struct e1000_hw *hw)
 
 	ret_val = e1e_rphy(hw, PHY_CONTROL, &data);
 	if (ret_val)
-		goto out;
+		return ret_val;
 
 	e1000e_phy_force_speed_duplex_setup(hw, &data);
 
 	ret_val = e1e_wphy(hw, PHY_CONTROL, data);
 	if (ret_val)
-		goto out;
+		return ret_val;
 
 	/* Disable MDI-X support for 10/100 */
 	ret_val = e1e_rphy(hw, IFE_PHY_MDIX_CONTROL, &data);
 	if (ret_val)
-		goto out;
+		return ret_val;
 
 	data &= ~IFE_PMC_AUTO_MDIX;
 	data &= ~IFE_PMC_FORCE_MDIX;
 
 	ret_val = e1e_wphy(hw, IFE_PHY_MDIX_CONTROL, data);
 	if (ret_val)
-		goto out;
+		return ret_val;
 
 	e_dbg("IFE PMC: %X\n", data);
 
@@ -1429,7 +1417,7 @@ s32 e1000_phy_force_speed_duplex_ife(struct e1000_hw *hw)
 		                                     100000,
 		                                     &link);
 		if (ret_val)
-			goto out;
+			return ret_val;
 
 		if (!link)
 			e_dbg("Link taking longer than expected.\n");
@@ -1440,11 +1428,10 @@ s32 e1000_phy_force_speed_duplex_ife(struct e1000_hw *hw)
 		                                     100000,
 		                                     &link);
 		if (ret_val)
-			goto out;
+			return ret_val;
 	}
 
-out:
-	return ret_val;
+	return 0;
 }
 
 /**
@@ -1829,22 +1816,20 @@ s32 e1000e_get_cable_length_m88(struct e1000_hw *hw)
 
 	ret_val = e1e_rphy(hw, M88E1000_PHY_SPEC_STATUS, &phy_data);
 	if (ret_val)
-		goto out;
+		return ret_val;
 
 	index = (phy_data & M88E1000_PSSR_CABLE_LENGTH) >>
 	        M88E1000_PSSR_CABLE_LENGTH_SHIFT;
-	if (index >= M88E1000_CABLE_LENGTH_TABLE_SIZE - 1) {
-		ret_val = -E1000_ERR_PHY;
-		goto out;
-	}
+
+	if (index >= M88E1000_CABLE_LENGTH_TABLE_SIZE - 1)
+		return -E1000_ERR_PHY;
 
 	phy->min_cable_length = e1000_m88_cable_length_table[index];
 	phy->max_cable_length = e1000_m88_cable_length_table[index + 1];
 
 	phy->cable_length = (phy->min_cable_length + phy->max_cable_length) / 2;
 
-out:
-	return ret_val;
+	return 0;
 }
 
 /**
@@ -2069,24 +2054,23 @@ s32 e1000_get_phy_info_ife(struct e1000_hw *hw)
 
 	ret_val = e1000e_phy_has_link_generic(hw, 1, 0, &link);
 	if (ret_val)
-		goto out;
+		return ret_val;
 
 	if (!link) {
 		e_dbg("Phy info is only valid if link is up\n");
-		ret_val = -E1000_ERR_CONFIG;
-		goto out;
+		return -E1000_ERR_CONFIG;
 	}
 
 	ret_val = e1e_rphy(hw, IFE_PHY_SPECIAL_CONTROL, &data);
 	if (ret_val)
-		goto out;
+		return ret_val;
 	phy->polarity_correction = (data & IFE_PSC_AUTO_POLARITY_DISABLE)
 	                           ? false : true;
 
 	if (phy->polarity_correction) {
 		ret_val = e1000_check_polarity_ife(hw);
 		if (ret_val)
-			goto out;
+			return ret_val;
 	} else {
 		/* Polarity is forced */
 		phy->cable_polarity = (data & IFE_PSC_FORCE_POLARITY)
@@ -2096,7 +2080,7 @@ s32 e1000_get_phy_info_ife(struct e1000_hw *hw)
 
 	ret_val = e1e_rphy(hw, IFE_PHY_MDIX_CONTROL, &data);
 	if (ret_val)
-		goto out;
+		return ret_val;
 
 	phy->is_mdix = (data & IFE_PMC_MDIX_STATUS) ? true : false;
 
@@ -2105,8 +2089,7 @@ s32 e1000_get_phy_info_ife(struct e1000_hw *hw)
 	phy->local_rx = e1000_1000t_rx_status_undefined;
 	phy->remote_rx = e1000_1000t_rx_status_undefined;
 
-out:
-	return ret_val;
+	return 0;
 }
 
 /**
@@ -2365,7 +2348,6 @@ enum e1000_phy_type e1000e_get_phy_type_from_id(u32 phy_id)
  **/
 s32 e1000e_determine_phy_address(struct e1000_hw *hw)
 {
-	s32 ret_val = -E1000_ERR_PHY_TYPE;
 	u32 phy_addr = 0;
 	u32 i;
 	enum e1000_phy_type phy_type = e1000_phy_unknown;
@@ -2384,17 +2366,15 @@ s32 e1000e_determine_phy_address(struct e1000_hw *hw)
 			 * If phy_type is valid, break - we found our
 			 * PHY address
 			 */
-			if (phy_type  != e1000_phy_unknown) {
-				ret_val = 0;
-				goto out;
-			}
+			if (phy_type  != e1000_phy_unknown)
+				return 0;
+
 			usleep_range(1000, 2000);
 			i++;
 		} while (i < 10);
 	}
 
-out:
-	return ret_val;
+	return -E1000_ERR_PHY_TYPE;
 }
 
 /**
@@ -2638,14 +2618,14 @@ s32 e1000_enable_phy_wakeup_reg_access_bm(struct e1000_hw *hw, u16 *phy_reg)
 	ret_val = e1000_set_page_igp(hw, (BM_PORT_CTRL_PAGE << IGP_PAGE_SHIFT));
 	if (ret_val) {
 		e_dbg("Could not set Port Control page\n");
-		goto out;
+		return ret_val;
 	}
 
 	ret_val = e1000e_read_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, phy_reg);
 	if (ret_val) {
 		e_dbg("Could not read PHY register %d.%d\n",
 		      BM_PORT_CTRL_PAGE, BM_WUC_ENABLE_REG);
-		goto out;
+		return ret_val;
 	}
 
 	/*
@@ -2660,15 +2640,14 @@ s32 e1000_enable_phy_wakeup_reg_access_bm(struct e1000_hw *hw, u16 *phy_reg)
 	if (ret_val) {
 		e_dbg("Could not write PHY register %d.%d\n",
 		      BM_PORT_CTRL_PAGE, BM_WUC_ENABLE_REG);
-		goto out;
+		return ret_val;
 	}
 
-	/* Select Host Wakeup Registers page */
-	ret_val = e1000_set_page_igp(hw, (BM_WUC_PAGE << IGP_PAGE_SHIFT));
-
-	/* caller now able to write registers on the Wakeup registers page */
-out:
-	return ret_val;
+	/*
+	 * Select Host Wakeup Registers page - caller now able to write
+	 * registers on the Wakeup registers page
+	 */
+	return e1000_set_page_igp(hw, (BM_WUC_PAGE << IGP_PAGE_SHIFT));
 }
 
 /**
@@ -2690,7 +2669,7 @@ s32 e1000_disable_phy_wakeup_reg_access_bm(struct e1000_hw *hw, u16 *phy_reg)
 	ret_val = e1000_set_page_igp(hw, (BM_PORT_CTRL_PAGE << IGP_PAGE_SHIFT));
 	if (ret_val) {
 		e_dbg("Could not set Port Control page\n");
-		goto out;
+		return ret_val;
 	}
 
 	/* Restore 769.17 to its original value */
@@ -2698,7 +2677,7 @@ s32 e1000_disable_phy_wakeup_reg_access_bm(struct e1000_hw *hw, u16 *phy_reg)
 	if (ret_val)
 		e_dbg("Could not restore PHY register %d.%d\n",
 		      BM_PORT_CTRL_PAGE, BM_WUC_ENABLE_REG);
-out:
+
 	return ret_val;
 }
 
@@ -2746,7 +2725,7 @@ static s32 e1000_access_phy_wakeup_reg_bm(struct e1000_hw *hw, u32 offset,
 		ret_val = e1000_enable_phy_wakeup_reg_access_bm(hw, &phy_reg);
 		if (ret_val) {
 			e_dbg("Could not enable PHY wakeup reg access\n");
-			goto out;
+			return ret_val;
 		}
 	}
 
@@ -2756,7 +2735,7 @@ static s32 e1000_access_phy_wakeup_reg_bm(struct e1000_hw *hw, u32 offset,
 	ret_val = e1000e_write_phy_reg_mdic(hw, BM_WUC_ADDRESS_OPCODE, reg);
 	if (ret_val) {
 		e_dbg("Could not write address opcode to page %d\n", page);
-		goto out;
+		return ret_val;
 	}
 
 	if (read) {
@@ -2771,13 +2750,12 @@ static s32 e1000_access_phy_wakeup_reg_bm(struct e1000_hw *hw, u32 offset,
 
 	if (ret_val) {
 		e_dbg("Could not access PHY reg %d.%d\n", page, reg);
-		goto out;
+		return ret_val;
 	}
 
 	if (!page_set)
 		ret_val = e1000_disable_phy_wakeup_reg_access_bm(hw, &phy_reg);
 
-out:
 	return ret_val;
 }
 
@@ -3133,7 +3111,7 @@ static s32 e1000_access_phy_debug_regs_hv(struct e1000_hw *hw, u32 offset,
 	ret_val = e1000e_write_phy_reg_mdic(hw, addr_reg, (u16)offset & 0x3F);
 	if (ret_val) {
 		e_dbg("Could not write the Address Offset port register\n");
-		goto out;
+		return ret_val;
 	}
 
 	/* Read or write the data value next */
@@ -3142,12 +3120,9 @@ static s32 e1000_access_phy_debug_regs_hv(struct e1000_hw *hw, u32 offset,
 	else
 		ret_val = e1000e_write_phy_reg_mdic(hw, data_reg, *data);
 
-	if (ret_val) {
+	if (ret_val)
 		e_dbg("Could not access the Data port register\n");
-		goto out;
-	}
 
-out:
 	return ret_val;
 }
 
@@ -3168,17 +3143,17 @@ s32 e1000_link_stall_workaround_hv(struct e1000_hw *hw)
 	u16 data;
 
 	if (hw->phy.type != e1000_phy_82578)
-		goto out;
+		return 0;
 
 	/* Do not apply workaround if in PHY loopback bit 14 set */
 	e1e_rphy(hw, PHY_CONTROL, &data);
 	if (data & PHY_CONTROL_LB)
-		goto out;
+		return 0;
 
 	/* check if link is up and at 1Gbps */
 	ret_val = e1e_rphy(hw, BM_CS_STATUS, &data);
 	if (ret_val)
-		goto out;
+		return ret_val;
 
 	data &= BM_CS_STATUS_LINK_UP |
 	        BM_CS_STATUS_RESOLVED |
@@ -3187,7 +3162,7 @@ s32 e1000_link_stall_workaround_hv(struct e1000_hw *hw)
 	if (data != (BM_CS_STATUS_LINK_UP |
 	             BM_CS_STATUS_RESOLVED |
 	             BM_CS_STATUS_SPEED_1000))
-		goto out;
+		return 0;
 
 	mdelay(200);
 
@@ -3195,12 +3170,9 @@ s32 e1000_link_stall_workaround_hv(struct e1000_hw *hw)
 	ret_val = e1e_wphy(hw, HV_MUX_DATA_CTRL, HV_MUX_DATA_CTRL_GEN_TO_MAC |
 			   HV_MUX_DATA_CTRL_FORCE_SPEED);
 	if (ret_val)
-		goto out;
-
-	ret_val = e1e_wphy(hw, HV_MUX_DATA_CTRL, HV_MUX_DATA_CTRL_GEN_TO_MAC);
+		return ret_val;
 
-out:
-	return ret_val;
+	return e1e_wphy(hw, HV_MUX_DATA_CTRL, HV_MUX_DATA_CTRL_GEN_TO_MAC);
 }
 
 /**
@@ -3242,13 +3214,13 @@ s32 e1000_phy_force_speed_duplex_82577(struct e1000_hw *hw)
 
 	ret_val = e1e_rphy(hw, PHY_CONTROL, &phy_data);
 	if (ret_val)
-		goto out;
+		return ret_val;
 
 	e1000e_phy_force_speed_duplex_setup(hw, &phy_data);
 
 	ret_val = e1e_wphy(hw, PHY_CONTROL, phy_data);
 	if (ret_val)
-		goto out;
+		return ret_val;
 
 	udelay(1);
 
@@ -3260,7 +3232,7 @@ s32 e1000_phy_force_speed_duplex_82577(struct e1000_hw *hw)
 		                                     100000,
 		                                     &link);
 		if (ret_val)
-			goto out;
+			return ret_val;
 
 		if (!link)
 			e_dbg("Link taking longer than expected.\n");
@@ -3270,11 +3242,8 @@ s32 e1000_phy_force_speed_duplex_82577(struct e1000_hw *hw)
 		                                     PHY_FORCE_LIMIT,
 		                                     100000,
 		                                     &link);
-		if (ret_val)
-			goto out;
 	}
 
-out:
 	return ret_val;
 }
 
@@ -3296,23 +3265,22 @@ s32 e1000_get_phy_info_82577(struct e1000_hw *hw)
 
 	ret_val = e1000e_phy_has_link_generic(hw, 1, 0, &link);
 	if (ret_val)
-		goto out;
+		return ret_val;
 
 	if (!link) {
 		e_dbg("Phy info is only valid if link is up\n");
-		ret_val = -E1000_ERR_CONFIG;
-		goto out;
+		return -E1000_ERR_CONFIG;
 	}
 
 	phy->polarity_correction = true;
 
 	ret_val = e1000_check_polarity_82577(hw);
 	if (ret_val)
-		goto out;
+		return ret_val;
 
 	ret_val = e1e_rphy(hw, I82577_PHY_STATUS_2, &data);
 	if (ret_val)
-		goto out;
+		return ret_val;
 
 	phy->is_mdix = (data & I82577_PHY_STATUS2_MDIX) ? true : false;
 
@@ -3320,11 +3288,11 @@ s32 e1000_get_phy_info_82577(struct e1000_hw *hw)
 	    I82577_PHY_STATUS2_SPEED_1000MBPS) {
 		ret_val = hw->phy.ops.get_cable_length(hw);
 		if (ret_val)
-			goto out;
+			return ret_val;
 
 		ret_val = e1e_rphy(hw, PHY_1000T_STATUS, &data);
 		if (ret_val)
-			goto out;
+			return ret_val;
 
 		phy->local_rx = (data & SR_1000T_LOCAL_RX_STATUS)
 		                ? e1000_1000t_rx_status_ok
@@ -3339,8 +3307,7 @@ s32 e1000_get_phy_info_82577(struct e1000_hw *hw)
 		phy->remote_rx = e1000_1000t_rx_status_undefined;
 	}
 
-out:
-	return ret_val;
+	return 0;
 }
 
 /**
@@ -3358,7 +3325,7 @@ s32 e1000_get_cable_length_82577(struct e1000_hw *hw)
 
 	ret_val = e1e_rphy(hw, I82577_PHY_DIAG_STATUS, &phy_data);
 	if (ret_val)
-		goto out;
+		return ret_val;
 
 	length = (phy_data & I82577_DSTATUS_CABLE_LENGTH) >>
 	         I82577_DSTATUS_CABLE_LENGTH_SHIFT;
@@ -3368,6 +3335,5 @@ s32 e1000_get_cable_length_82577(struct e1000_hw *hw)
 
 	phy->cable_length = length;
 
-out:
-	return ret_val;
+	return 0;
 }