Re: [PATCH] usb: gadget: langwell_udc: Fix error path

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Hello.

On 03-10-2010 17:49, Rahul Ruikar wrote:

- call device_unregister() only when device_register() is sucess.

   s/is sucess/succeeds/

- call put_device() when device_register() fails.

Signed-off-by: Rahul Ruikar<rahul.ruikar@xxxxxxxxx>
---
  drivers/usb/gadget/langwell_udc.c |   18 ++++++++++++++----
  drivers/usb/gadget/langwell_udc.h |    4 +++-
  2 files changed, 17 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/gadget/langwell_udc.c b/drivers/usb/gadget/langwell_udc.c
index c2d2a20..2b5ae16 100644
--- a/drivers/usb/gadget/langwell_udc.c
+++ b/drivers/usb/gadget/langwell_udc.c
@@ -2952,8 +2952,13 @@ static void langwell_udc_remove(struct pci_dev *pdev)
  	INFO(dev, "unbind\n");
  	DBG(dev, "<--- %s()\n", __func__);

-	device_unregister(&dev->gadget.dev);
-	device_remove_file(&pdev->dev,&dev_attr_langwell_udc);
+	if (dev->dev_reg_status == 2)
+		device_unregister(&dev->gadget.dev);
+	else if (dev->dev_reg_status == 1)
+		put_device(&dev->gadget.dev);
+
+	if (dev->dev_create_file)
+		device_remove_file(&pdev->dev,&dev_attr_langwell_udc);

  #ifndef	OTG_TRANSCEIVER
  	pci_set_drvdata(pdev, NULL);
@@ -3190,12 +3195,17 @@ static int langwell_udc_probe(struct pci_dev *pdev,
  	the_controller = dev;

  	retval = device_register(&dev->gadget.dev);
-	if (retval)
+	if (retval) {
+		dev_reg_status = 1;

   Did you mean 'dev->dev_reg_status'?

  		goto error;
+	}
+	dev_reg_status = 2;

   Same question.


  	retval = device_create_file(&pdev->dev,&dev_attr_langwell_udc);
-	if (retval)
+	if (retval) {
+		dev_create_file = 1;

   Did you mean 'dev->dev_create_file'?

WBR, Sergei
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