linux-kernel - [PATCH] mfd: mt6397: Do not call irq_domain

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Message-Id: <20181022025505.27919-1-drinkcat@chromium.org>
Date:   Mon, 22 Oct 2018 10:55:06 +0800
From:   Nicolas Boichat <drinkcat@...omium.org>
To:     "Lee Jones )" <lee.jones@...aro.org>
Cc:     linux-kernel@...r.kernel.org, linux-mediatek@...ts.infradead.org
Subject: [PATCH] mfd: mt6397: Do not call irq_domain_remove if PMIC unsupported

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>
---
 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 77b64bd64df36a..ab24e176ef4487 100644
--- a/drivers/mfd/mt6397-core.c
+++ b/drivers/mfd/mt6397-core.c
@@ -329,8 +329,7 @@ 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) {
-- 
2.19.1.568.g152ad8e336-goog