linux-kernel - [PATCH AUTOSEL 4.9 04/21] mfd: mt6397: Do not call irq_domain

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Date:   Tue, 12 Feb 2019 21:40:23 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Nicolas Boichat <drinkcat@...omium.org>,
        Lee Jones <lee.jones@...aro.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH AUTOSEL 4.9 04/21] mfd: mt6397: Do not call irq_domain_remove if PMIC unsupported

From: Nicolas Boichat <drinkcat@...omium.org>

[ Upstream commit a177276aa098aa47a100d51a13eaaef029604b6d ]

If the PMIC ID is unknown, the current code would call
irq_domain_remove and panic, as pmic->irq_domain is only
initialized by mt6397_irq_init.

Return immediately with an error, if the chip ID is unsupported.

Signed-off-by: Nicolas Boichat <drinkcat@...omium.org>
Signed-off-by: Lee Jones <lee.jones@...aro.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/mfd/mt6397-core.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/mfd/mt6397-core.c b/drivers/mfd/mt6397-core.c
index e14d8b058f0c..5d4c10f05450 100644
--- a/drivers/mfd/mt6397-core.c
+++ b/drivers/mfd/mt6397-core.c
@@ -306,8 +306,7 @@ static int mt6397_probe(struct platform_device *pdev)
 
 	default:
 		dev_err(&pdev->dev, "unsupported chip: %d\n", id);
-		ret = -ENODEV;
-		break;
+		return -ENODEV;
 	}
 
 	if (ret) {
-- 
2.19.1