From: Wenzhuo Lu <wenzhuo.lu@intel.com>
Date: Fri, 16 Oct 2015 02:50:58 +0000 (+0800)
Subject: e1000/base: check more errors for ESB2 init and reset
X-Git-Tag: spdx-start~8341
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=32c646d6d230f80d163727eb285fbb747b276bb1;p=dpdk.git

e1000/base: check more errors for ESB2 init and reset

Adding code where missing to handle case where calls to
e1000_read_kmrn_reg_80003es2lan and e1000_write_kmrn_reg_80003es2lan return
an error value.
Also, when accessing the E1000_KMRNCTRLSTA_INBAND_PARAM offset to disable
far-end loopback on 80003es2lan devices, make the handling of a read or
write failure consistent between hw_init and hw_reset.

Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com>
---

diff --git a/drivers/net/e1000/base/e1000_80003es2lan.c b/drivers/net/e1000/base/e1000_80003es2lan.c
index b79496be29..5ac925e41a 100644
--- a/drivers/net/e1000/base/e1000_80003es2lan.c
+++ b/drivers/net/e1000/base/e1000_80003es2lan.c
@@ -852,11 +852,15 @@ STATIC s32 e1000_reset_hw_80003es2lan(struct e1000_hw *hw)
 	/* Disable IBIST slave mode (far-end loopback) */
 	ret_val = e1000_read_kmrn_reg_80003es2lan(hw,
 				E1000_KMRNCTRLSTA_INBAND_PARAM, &kum_reg_data);
-	if (ret_val)
-		return ret_val;
-	kum_reg_data |= E1000_KMRNCTRLSTA_IBIST_DISABLE;
-	e1000_write_kmrn_reg_80003es2lan(hw, E1000_KMRNCTRLSTA_INBAND_PARAM,
-					kum_reg_data);
+	if (!ret_val) {
+		kum_reg_data |= E1000_KMRNCTRLSTA_IBIST_DISABLE;
+		ret_val = e1000_write_kmrn_reg_80003es2lan(hw,
+						 E1000_KMRNCTRLSTA_INBAND_PARAM,
+						 kum_reg_data);
+		if (ret_val)
+			DEBUGOUT("Error disabling far-end loopback\n");
+	} else
+		DEBUGOUT("Error disabling far-end loopback\n");
 
 	ret_val = e1000_get_auto_rd_done_generic(hw);
 	if (ret_val)
@@ -912,11 +916,18 @@ STATIC s32 e1000_init_hw_80003es2lan(struct e1000_hw *hw)
 		return ret_val;
 
 	/* Disable IBIST slave mode (far-end loopback) */
-	e1000_read_kmrn_reg_80003es2lan(hw, E1000_KMRNCTRLSTA_INBAND_PARAM,
-					&kum_reg_data);
-	kum_reg_data |= E1000_KMRNCTRLSTA_IBIST_DISABLE;
-	e1000_write_kmrn_reg_80003es2lan(hw, E1000_KMRNCTRLSTA_INBAND_PARAM,
-					 kum_reg_data);
+	ret_val =
+	    e1000_read_kmrn_reg_80003es2lan(hw, E1000_KMRNCTRLSTA_INBAND_PARAM,
+					    &kum_reg_data);
+	if (!ret_val) {
+		kum_reg_data |= E1000_KMRNCTRLSTA_IBIST_DISABLE;
+		ret_val = e1000_write_kmrn_reg_80003es2lan(hw,
+						 E1000_KMRNCTRLSTA_INBAND_PARAM,
+						 kum_reg_data);
+		if (ret_val)
+			DEBUGOUT("Error disabling far-end loopback\n");
+	} else
+		DEBUGOUT("Error disabling far-end loopback\n");
 
 	/* Set the transmit descriptor write-back policy */
 	reg_data = E1000_READ_REG(hw, E1000_TXDCTL(0));