ASoC: txx9aclc_ac97: Fix kernel crash on probe

This patch fixes a crash caused by commit 3bed3344c826
(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: 3bed3344c826 (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

1 files changed, 5 insertions, 3 deletions

diff --git a/sound/soc/txx9/txx9aclc-ac97.c b/sound/soc/txx9/txx9aclc-ac97.c
index e0305a148568..9edd68db9f48 100644
--- a/sound/soc/txx9/txx9aclc-ac97.c
+++ b/sound/soc/txx9/txx9aclc-ac97.c
@@ -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) &&