ixgbe: fix errors related to protected AUTOC calls

Found several incorrect conditionals after calling the prot_autoc_*
functions. Likewise we weren't always freeing the FWSW semaphore after
grabbing it.   This would lead to DA cables being unable to link along with
possible other errors.

CC: Arun Sharma <asharma@fb.com>
CC: Emil Tantilov <emil.s.tantilov@intel.com>
Signed-off-by: Don Skidmore <donald.c.skidmore@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/ixgbe/ixgbe_82599.c

@@ -210,7 +210,7 @@ static s32 prot_autoc_read_82599(struct ixgbe_hw *hw, bool *locked,
 	if (ixgbe_verify_lesm_fw_enabled_82599(hw)) {
 		ret_val = hw->mac.ops.acquire_swfw_sync(hw,
 					IXGBE_GSSR_MAC_CSR_SM);
-		if (!ret_val)
+		if (ret_val)
 			return IXGBE_ERR_SWFW_SYNC;
 
 		*locked = true;
@@ -245,8 +245,10 @@ static s32 prot_autoc_write_82599(struct ixgbe_hw *hw, u32 autoc, bool locked)
 	if (!locked && ixgbe_verify_lesm_fw_enabled_82599(hw)) {
 		ret_val = hw->mac.ops.acquire_swfw_sync(hw,
 					IXGBE_GSSR_MAC_CSR_SM);
-		if (!ret_val)
+		if (ret_val)
 			return IXGBE_ERR_SWFW_SYNC;
+
+		locked = true;
 	}
 
 	IXGBE_WRITE_REG(hw, IXGBE_AUTOC, autoc);
@@ -1094,7 +1096,7 @@ static s32 ixgbe_setup_mac_link_82599(struct ixgbe_hw *hw,
 	if (autoc != start_autoc) {
 		/* Restart link */
 		status = hw->mac.ops.prot_autoc_write(hw, autoc, false);
-		if (!status)
+		if (status)
 			goto out;
 
 		/* Only poll for autoneg to complete if specified to do so */
@@ -1277,7 +1279,7 @@ static s32 ixgbe_reset_hw_82599(struct ixgbe_hw *hw)
 			status = hw->mac.ops.prot_autoc_write(hw,
 							hw->mac.orig_autoc,
 							false);
-			if (!status)
+			if (status)
 				goto reset_hw_out;
 		}
 

drivers/net/ethernet/intel/ixgbe/ixgbe_common.c

@@ -143,7 +143,7 @@ static s32 ixgbe_setup_fc(struct ixgbe_hw *hw)
 	case ixgbe_media_type_backplane:
 		/* some MAC's need RMW protection on AUTOC */
 		ret_val = hw->mac.ops.prot_autoc_read(hw, &locked, &reg_bp);
-		if (!ret_val)
+		if (ret_val)
 			goto out;
 
 		/* only backplane uses autoc so fall though */
@@ -2723,14 +2723,14 @@ s32 ixgbe_blink_led_start_generic(struct ixgbe_hw *hw, u32 index)
 
 	if (!link_up) {
 		ret_val = hw->mac.ops.prot_autoc_read(hw, &locked, &autoc_reg);
-		if (!ret_val)
+		if (ret_val)
 			goto out;
 
 		autoc_reg |= IXGBE_AUTOC_AN_RESTART;
 		autoc_reg |= IXGBE_AUTOC_FLU;
 
 		ret_val = hw->mac.ops.prot_autoc_write(hw, autoc_reg, locked);
-		if (!ret_val)
+		if (ret_val)
 			goto out;
 
 		IXGBE_WRITE_FLUSH(hw);
@@ -2760,14 +2760,14 @@ s32 ixgbe_blink_led_stop_generic(struct ixgbe_hw *hw, u32 index)
 	bool locked = false;
 
 	ret_val = hw->mac.ops.prot_autoc_read(hw, &locked, &autoc_reg);
-	if (!ret_val)
+	if (ret_val)
 		goto out;
 
 	autoc_reg &= ~IXGBE_AUTOC_FLU;
 	autoc_reg |= IXGBE_AUTOC_AN_RESTART;
 
 	ret_val = hw->mac.ops.prot_autoc_write(hw, autoc_reg, locked);
-	if (!ret_val)
+	if (ret_val)
 		goto out;
 
 	led_reg &= ~IXGBE_LED_MODE_MASK(index);