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ASoC: txx9aclc_ac97: Fix kernel crash on probe

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This patch fixes a crash caused by commit 3bed3344c8
(ASoC: txx9aclc_ac97: Convert to devm_ioremap_resource()).
This is an attempt to assign "drvdata->base" while memory
for "drvdata" is not already allocated.

Fixes: 3bed3344c8 (ASoC: txx9aclc_ac97: Convert to devm_ioremap_resource())
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Mark Brown <broonie@linaro.org>
Cc: stable@vger.kernel.org
This commit is contained in:
Alexander Shiyan 2014-02-15 23:28:29 +04:00 committed by Mark Brown
parent 38dbfb59d1
commit 9febd494d1
1 changed files with 5 additions and 3 deletions
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8
sound/soc/txx9/txx9aclc-ac97.c
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@ -183,14 +183,16 @@ static int txx9aclc_ac97_dev_probe(struct platform_device *pdev)
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL);
if (!drvdata)
return -ENOMEM;
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
drvdata->base = devm_ioremap_resource(&pdev->dev, r);
if (IS_ERR(drvdata->base))
return PTR_ERR(drvdata->base);
drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL);
if (!drvdata)
return -ENOMEM;
platform_set_drvdata(pdev, drvdata);
drvdata->physbase = r->start;
if (sizeof(drvdata->physbase) > sizeof(r->start) &&