linux-kernel - [PATCH] mfd: ti_am335x_tscadc: Fix static checker warning

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Message-ID: <20191109050618.20637-1-vigneshr@ti.com>
Date:   Sat, 9 Nov 2019 10:36:18 +0530
From:   Vignesh Raghavendra <vigneshr@...com>
To:     Lee Jones <lee.jones@...aro.org>
CC:     <linux-kernel@...r.kernel.org>, <linux-omap@...r.kernel.org>,
        Vignesh Raghavendra <vigneshr@...com>,
        Dan Murphy <dmurphy@...com>
Subject: [PATCH] mfd: ti_am335x_tscadc: Fix static checker warning

It is possible that platform_get_resource() might return NULL and
therefore code needs to check for this condition before
de-referencing the pointer.
Therefore move the de-referencing of 'res' pointer after
devm_ioremap_resource() which would have checked the validity of the
pointer

Reported-by: Dan Murphy <dmurphy@...com>
Signed-off-by: Vignesh Raghavendra <vigneshr@...com>
---
 drivers/mfd/ti_am335x_tscadc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mfd/ti_am335x_tscadc.c b/drivers/mfd/ti_am335x_tscadc.c
index fd111296b959..926c289cb040 100644
--- a/drivers/mfd/ti_am335x_tscadc.c
+++ b/drivers/mfd/ti_am335x_tscadc.c
@@ -182,11 +182,11 @@ static	int ti_tscadc_probe(struct platform_device *pdev)
 		tscadc->irq = err;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	tscadc->tscadc_phys_base = res->start;
 	tscadc->tscadc_base = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(tscadc->tscadc_base))
 		return PTR_ERR(tscadc->tscadc_base);
 
+	tscadc->tscadc_phys_base = res->start;
 	tscadc->regmap = devm_regmap_init_mmio(&pdev->dev,
 			tscadc->tscadc_base, &tscadc_regmap_config);
 	if (IS_ERR(tscadc->regmap)) {
-- 
2.24.0