sh-pfc: Use proper error codes

Return proper error codes instead of -1, and propagate the error codes.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/sh-pfc/core.c

@@ -93,7 +93,7 @@ int sh_pfc_get_pin_index(struct sh_pfc *pfc, unsigned int pin)
 		offset += range->end - range->begin + 1;
 	}
 
-	return -1;
+	return -EINVAL;
 }
 
 static int sh_pfc_enum_in_range(pinmux_enum_t enum_id,
@@ -233,7 +233,7 @@ static int sh_pfc_get_config_reg(struct sh_pfc *pfc, pinmux_enum_t enum_id,
 		k++;
 	}
 
-	return -1;
+	return -EINVAL;
 }
 
 static int sh_pfc_mark_to_enum(struct sh_pfc *pfc, pinmux_enum_t mark, int pos,
@@ -255,7 +255,7 @@ static int sh_pfc_mark_to_enum(struct sh_pfc *pfc, pinmux_enum_t mark, int pos,
 	}
 
 	pr_err("cannot locate data/mark enum_id for mark %d\n", mark);
-	return -1;
+	return -EINVAL;
 }
 
 int sh_pfc_config_mux(struct sh_pfc *pfc, unsigned mark, int pinmux_type)
@@ -264,6 +264,7 @@ int sh_pfc_config_mux(struct sh_pfc *pfc, unsigned mark, int pinmux_type)
 	pinmux_enum_t enum_id;
 	const struct pinmux_range *range;
 	int in_range, pos, field, value;
+	int ret;
 
 	switch (pinmux_type) {
 
@@ -288,7 +289,7 @@ int sh_pfc_config_mux(struct sh_pfc *pfc, unsigned mark, int pinmux_type)
 		break;
 
 	default:
-		return -1;
+		return -EINVAL;
 	}
 
 	pos = 0;
@@ -297,8 +298,8 @@ int sh_pfc_config_mux(struct sh_pfc *pfc, unsigned mark, int pinmux_type)
 	value = 0;
 	while (1) {
 		pos = sh_pfc_mark_to_enum(pfc, mark, pos, &enum_id);
-		if (pos <= 0)
-			return -1;
+		if (pos < 0)
+			return pos;
 
 		if (!enum_id)
 			break;
@@ -341,9 +342,9 @@ int sh_pfc_config_mux(struct sh_pfc *pfc, unsigned mark, int pinmux_type)
 		if (!in_range)
 			continue;
 
-		if (sh_pfc_get_config_reg(pfc, enum_id, &cr,
-					  &field, &value) != 0)
-			return -1;
+		ret = sh_pfc_get_config_reg(pfc, enum_id, &cr, &field, &value);
+		if (ret < 0)
+			return ret;
 
 		sh_pfc_write_config_reg(pfc, cr, field, value);
 	}

drivers/pinctrl/sh-pfc/gpio.c

@@ -276,22 +276,17 @@ static int gpio_function_request(struct gpio_chip *gc, unsigned offset)
 	struct sh_pfc *pfc = gpio_to_pfc(gc);
 	unsigned int mark = pfc->info->func_gpios[offset].enum_id;
 	unsigned long flags;
-	int ret = -EINVAL;
+	int ret;
 
 	pr_notice_once("Use of GPIO API for function requests is deprecated, convert to pinctrl\n");
 
 	if (mark == 0)
-		return ret;
+		return -EINVAL;
 
 	spin_lock_irqsave(&pfc->lock, flags);
-
-	if (sh_pfc_config_mux(pfc, mark, PINMUX_TYPE_FUNCTION))
-		goto done;
-
-	ret = 0;
-
-done:
+	ret = sh_pfc_config_mux(pfc, mark, PINMUX_TYPE_FUNCTION);
 	spin_unlock_irqrestore(&pfc->lock, flags);
+
 	return ret;
 }
 

drivers/pinctrl/sh-pfc/pinctrl.c

@@ -114,18 +114,16 @@ static int sh_pfc_func_enable(struct pinctrl_dev *pctldev, unsigned selector,
 	const struct sh_pfc_pin_group *grp = &pfc->info->groups[group];
 	unsigned long flags;
 	unsigned int i;
-	int ret = -EINVAL;
+	int ret = 0;
 
 	spin_lock_irqsave(&pfc->lock, flags);
 
 	for (i = 0; i < grp->nr_pins; ++i) {
-		if (sh_pfc_config_mux(pfc, grp->mux[i], PINMUX_TYPE_FUNCTION))
-			goto done;
+		ret = sh_pfc_config_mux(pfc, grp->mux[i], PINMUX_TYPE_FUNCTION);
+		if (ret < 0)
+			break;
 	}
 
-	ret = 0;
-
-done:
 	spin_unlock_irqrestore(&pfc->lock, flags);
 	return ret;
 }
@@ -144,7 +142,7 @@ static int sh_pfc_reconfig_pin(struct sh_pfc_pinctrl *pmx, unsigned offset,
 	const struct sh_pfc_pin *pin = &pfc->info->pins[idx];
 	unsigned int mark = pin->enum_id;
 	unsigned long flags;
-	int ret = -EINVAL;
+	int ret;
 
 	spin_lock_irqsave(&pfc->lock, flags);
 
@@ -156,17 +154,17 @@ static int sh_pfc_reconfig_pin(struct sh_pfc_pinctrl *pmx, unsigned offset,
 	case PINMUX_TYPE_INPUT_PULLDOWN:
 		break;
 	default:
-		goto err;
+		ret = -EINVAL;
+		goto done;
 	}
 
-	if (sh_pfc_config_mux(pfc, mark, new_type) != 0)
-		goto err;
+	ret = sh_pfc_config_mux(pfc, mark, new_type);
+	if (ret < 0)
+		goto done;
 
 	cfg->type = new_type;
 
-	ret = 0;
-
-err:
+done:
 	spin_unlock_irqrestore(&pfc->lock, flags);
 
 	return ret;