net: stmmac: selftests: Return proper error code to userspace

We can do better than just return 1 to userspace. Lets return a proper
Linux error code.
Signed-off-by: Jose Abreu <joabreu@synopsys.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c

@@ -318,7 +318,7 @@ static int __stmmac_test_loopback(struct stmmac_priv *priv,
 		attr->timeout = STMMAC_LB_TIMEOUT;
 
 	wait_for_completion_timeout(&tpriv->comp, attr->timeout);
-	ret = !tpriv->ok;
+	ret = tpriv->ok ? 0 : -ETIMEDOUT;
 
 cleanup:
 	if (!attr->dont_wait)
@@ -480,7 +480,7 @@ static int stmmac_test_hfilt(struct stmmac_priv *priv)
 
 	/* Shall NOT receive packet */
 	ret = __stmmac_test_loopback(priv, &attr);
-	ret = !ret;
+	ret = ret ? 0 : -EINVAL;
 
 cleanup:
 	dev_mc_del(priv->dev, gd_addr);
@@ -512,7 +512,7 @@ static int stmmac_test_pfilt(struct stmmac_priv *priv)
 
 	/* Shall NOT receive packet */
 	ret = __stmmac_test_loopback(priv, &attr);
-	ret = !ret;
+	ret = ret ? 0 : -EINVAL;
 
 cleanup:
 	dev_uc_del(priv->dev, gd_addr);
@@ -562,7 +562,7 @@ static int stmmac_test_mcfilt(struct stmmac_priv *priv)
 
 	/* Shall NOT receive packet */
 	ret = __stmmac_test_loopback(priv, &attr);
-	ret = !ret;
+	ret = ret ? 0 : -EINVAL;
 
 cleanup:
 	dev_uc_del(priv->dev, uc_addr);
@@ -600,7 +600,7 @@ static int stmmac_test_ucfilt(struct stmmac_priv *priv)
 
 	/* Shall NOT receive packet */
 	ret = __stmmac_test_loopback(priv, &attr);
-	ret = !ret;
+	ret = ret ? 0 : -EINVAL;
 
 cleanup:
 	dev_mc_del(priv->dev, mc_addr);
@@ -699,7 +699,7 @@ static int stmmac_test_flowctrl(struct stmmac_priv *priv)
 	}
 
 	wait_for_completion_timeout(&tpriv->comp, STMMAC_LB_TIMEOUT);
-	ret = !tpriv->ok;
+	ret = tpriv->ok ? 0 : -ETIMEDOUT;
 
 cleanup:
 	dev_mc_del(priv->dev, paddr);
@@ -833,11 +833,11 @@ static int stmmac_test_vlanfilt(struct stmmac_priv *priv)
 			goto vlan_del;
 
 		wait_for_completion_timeout(&tpriv->comp, STMMAC_LB_TIMEOUT);
-		ret = !tpriv->ok;
+		ret = tpriv->ok ? 0 : -ETIMEDOUT;
 		if (ret && !i) {
 			goto vlan_del;
 		} else if (!ret && i) {
-			ret = -1;
+			ret = -EINVAL;
 			goto vlan_del;
 		} else {
 			ret = 0;
@@ -909,11 +909,11 @@ static int stmmac_test_dvlanfilt(struct stmmac_priv *priv)
 			goto vlan_del;
 
 		wait_for_completion_timeout(&tpriv->comp, STMMAC_LB_TIMEOUT);
-		ret = !tpriv->ok;
+		ret = tpriv->ok ? 0 : -ETIMEDOUT;
 		if (ret && !i) {
 			goto vlan_del;
 		} else if (!ret && i) {
-			ret = -1;
+			ret = -EINVAL;
 			goto vlan_del;
 		} else {
 			ret = 0;
@@ -998,7 +998,7 @@ static int stmmac_test_rxp(struct stmmac_priv *priv)
 	attr.src = addr;
 
 	ret = __stmmac_test_loopback(priv, &attr);
-	ret = !ret; /* Shall NOT receive packet */
+	ret = ret ? 0 : -EINVAL; /* Shall NOT receive packet */
 
 	cls_u32.command = TC_CLSU32_DELETE_KNODE;
 	stmmac_tc_setup_cls_u32(priv, priv, &cls_u32);