[PATCH v2 09/15] phy: renesas: rcar-gen3-usb2: Fix an error handling path in rcar_gen3_phy_usb2_probe()

[Claudiu]

From: Christophe JAILLET <christophe.jaillet at wanadoo.fr>

If an error occurs after the reset_control_deassert(),
reset_control_assert() must be called, as already done in the remove
function.

Use devm_add_action_or_reset() to add the missing call and simplify the
.remove() function accordingly.

Fixes: 4eae16375357 ("phy: renesas: rcar-gen3-usb2: Add support to initialize the bus")
Signed-off-by: Christophe JAILLET <christophe.jaillet at wanadoo.fr>
Reviewed-by: Biju Das <biju.das.jz at bp.renesas.com>
[claudiu.beznea: removed "struct reset_control *rstc = data;" from
 rcar_gen3_reset_assert()]
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj at bp.renesas.com>
---

Changes in v2:
- none; this patch is new; re-spinned the Christophe's work at
  https://lore.kernel.org/all/TYCPR01MB113329930BA5E2149C9BE2A1986672@TYCPR01MB11332.jpnprd01.prod.outlook.com/


 drivers/phy/renesas/phy-rcar-gen3-usb2.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/phy/renesas/phy-rcar-gen3-usb2.c b/drivers/phy/renesas/phy-rcar-gen3-usb2.c
index 775f4f973a6c..59f74aa993ac 100644
--- a/drivers/phy/renesas/phy-rcar-gen3-usb2.c
+++ b/drivers/phy/renesas/phy-rcar-gen3-usb2.c
@@ -668,6 +668,11 @@ static enum usb_dr_mode rcar_gen3_get_dr_mode(struct device_node *np)
 	return candidate;
 }
 
+static void rcar_gen3_reset_assert(void *data)
+{
+	reset_control_assert(data);
+}
+
 static int rcar_gen3_phy_usb2_init_bus(struct rcar_gen3_chan *channel)
 {
 	struct device *dev = channel->dev;
@@ -686,6 +691,11 @@ static int rcar_gen3_phy_usb2_init_bus(struct rcar_gen3_chan *channel)
 	if (ret)
 		goto rpm_put;
 
+	ret = devm_add_action_or_reset(dev, rcar_gen3_reset_assert,
+				       channel->rstc);
+	if (ret)
+		goto rpm_put;
+
 	val = readl(channel->base + USB2_AHB_BUS_CTR);
 	val &= ~USB2_AHB_BUS_CTR_MBL_MASK;
 	val |= USB2_AHB_BUS_CTR_MBL_INCR4;
@@ -815,7 +825,6 @@ static void rcar_gen3_phy_usb2_remove(struct platform_device *pdev)
 	if (channel->is_otg_channel)
 		device_remove_file(&pdev->dev, &dev_attr_role);
 
-	reset_control_assert(channel->rstc);
 	pm_runtime_disable(&pdev->dev);
 };
 
-- 
2.39.2