mfd: Fix pcap_add_subdev error path

1. return -ENOMEM if platform_device_alloc() fail.
2. call platform_device_put() if platform_device_add() fail.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 9 insertions, 1 deletions

diff --git a/drivers/mfd/ezx-pcap.c b/drivers/mfd/ezx-pcap.c
index 134c69aa4790..d283d77937b9 100644
--- a/drivers/mfd/ezx-pcap.c
+++ b/drivers/mfd/ezx-pcap.c
@@ -384,12 +384,20 @@ static int __devinit pcap_add_subdev(struct pcap_chip *pcap,
                                                 struct pcap_subdev *subdev)
 {
         struct platform_device *pdev;
+        int ret;
 
         pdev = platform_device_alloc(subdev->name, subdev->id);
+        if (!pdev)
+                return -ENOMEM;
+
         pdev->dev.parent = &pcap->spi->dev;
         pdev->dev.platform_data = subdev->platform_data;
 
-        return platform_device_add(pdev);
+        ret = platform_device_add(pdev);
+        if (ret)
+                platform_device_put(pdev);
+
+        return ret;
 }
 
 static int __devexit ezx_pcap_remove(struct spi_device *spi)