linux-kernel - [PATCH 13/18] staging: cx25821: call disable_pci_device() if pci

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Message-Id: <1281124379-13796-1-git-send-email-segooon@gmail.com>
Date:	Fri,  6 Aug 2010 23:52:57 +0400
From:	Kulikov Vasiliy <segooon@...il.com>
To:	kernel-janitors@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...e.de>,
	Mauro Carvalho Chehab <mchehab@...hat.com>,
	Palash Bandyopadhyay <Palash.Bandyopadhyay@...exant.com>,
	Olimpiu Pascariu <olimpiu.pascariu@...il.com>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Peter Huewe <peterhuewe@....de>, devel@...verdev.osuosl.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 13/18] staging: cx25821: call disable_pci_device() if pci_probe() failed

Driver should call disable_pci_device() if it returns from pci_probe()
with error. Also it must not be called if pci_request_region() fails as
it means that somebody uses device resources and rules the device.

Signed-off-by: Kulikov Vasiliy <segooon@...il.com>
---
 drivers/staging/cx25821/cx25821-core.c |   13 +++++++++----
 1 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/cx25821/cx25821-core.c b/drivers/staging/cx25821/cx25821-core.c
index c487c19..ad7ce01 100644
--- a/drivers/staging/cx25821/cx25821-core.c
+++ b/drivers/staging/cx25821/cx25821-core.c
@@ -962,7 +962,7 @@ static int cx25821_dev_setup(struct cx25821_dev *dev)
 		       dev->pci->subsystem_device);
 
 		cx25821_devcount--;
-		return -ENODEV;
+		return -EBUSY;
 	}
 
 	/* PCIe stuff */
@@ -1412,9 +1412,12 @@ static int __devinit cx25821_initdev(struct pci_dev *pci_dev,
 
 	printk(KERN_INFO "cx25821 Athena pci enable !\n");
 
-	if (cx25821_dev_setup(dev) < 0) {
-		err = -EINVAL;
-		goto fail_unregister_device;
+	err = cx25821_dev_setup(dev);
+	if (err) {
+		if (err == -EBUSY)
+			goto fail_unregister_device;
+		else
+			goto fail_unregister_pci;
 	}
 
 	/* print pci info */
@@ -1448,6 +1451,8 @@ fail_irq:
 	printk(KERN_INFO "cx25821 cx25821_initdev() can't get IRQ !\n");
 	cx25821_dev_unregister(dev);
 
+fail_unregister_pci:
+	pci_disable_device(pci_dev);
 fail_unregister_device:
 	v4l2_device_unregister(&dev->v4l2_dev);
 
-- 
1.7.0.4

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