linux-kernel - [PATCH] leds: leds-wm831x-status: init chip

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Message-Id: <20221122204837.11611-1-skhan@linuxfoundation.org>
Date:   Tue, 22 Nov 2022 13:48:37 -0700
From:   Shuah Khan <skhan@...uxfoundation.org>
To:     pavel@....cz
Cc:     Shuah Khan <skhan@...uxfoundation.org>,
        patches@...nsource.cirrus.com, linux-leds@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] leds: leds-wm831x-status: init chip_pdata before access

wm831x_status_probe() accesses status from chip_pdata before
initializing it. Fix it.

Signed-off-by: Shuah Khan <skhan@...uxfoundation.org>
---
 drivers/leds/leds-wm831x-status.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/leds/leds-wm831x-status.c b/drivers/leds/leds-wm831x-status.c
index c48b80574f02..5060c83f3b25 100644
--- a/drivers/leds/leds-wm831x-status.c
+++ b/drivers/leds/leds-wm831x-status.c
@@ -212,7 +212,7 @@ static int wm831x_status_probe(struct platform_device *pdev)
 	struct wm831x_status_pdata pdata;
 	struct wm831x_status *drvdata;
 	struct resource *res;
-	int id = pdev->id % ARRAY_SIZE(chip_pdata->status);
+	int id;
 	int ret;
 
 	res = platform_get_resource(pdev, IORESOURCE_REG, 0);
@@ -229,9 +229,10 @@ static int wm831x_status_probe(struct platform_device *pdev)
 	drvdata->wm831x = wm831x;
 	drvdata->reg = res->start;
 
-	if (dev_get_platdata(wm831x->dev))
+	if (dev_get_platdata(wm831x->dev)) {
 		chip_pdata = dev_get_platdata(wm831x->dev);
-	else
+		id = pdev->id % ARRAY_SIZE(chip_pdata->status);
+	} else
 		chip_pdata = NULL;
 
 	memset(&pdata, 0, sizeof(pdata));
-- 
2.34.1