linux-kernel - [PATCH 14/18] staging: comedi: amplc_pci224: no need to manipulate PCI ref count

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Date:	Thu, 31 Jul 2014 14:47:51 +0100
From:	Ian Abbott <abbotti@....co.uk>
To:	driverdev-devel@...uxdriverproject.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Ian Abbott <abbotti@....co.uk>,
	H Hartley Sweeten <hartleys@...ionengravers.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 14/18] staging: comedi: amplc_pci224: no need to manipulate PCI ref count

This driver no longer supports a "legacy" attach mechanism that searches
for a suitable PCI device and increments it's reference count, but since
the common "detach" handler `pci224_detach()` still has a left-over
`pci_dev_put()`, a matching `pci_dev_get()` is needed in the
"auto_attach" handler `pci224_auto_attach()`.  There is no longer any
reason to "get" and "put" the PCI device, so those calls can be removed.

Signed-off-by: Ian Abbott <abbotti@....co.uk>
---
 drivers/staging/comedi/drivers/amplc_pci224.c | 10 ----------
 1 file changed, 10 deletions(-)

diff --git a/drivers/staging/comedi/drivers/amplc_pci224.c b/drivers/staging/comedi/drivers/amplc_pci224.c
index 0bf5e68..bcef9e6 100644
--- a/drivers/staging/comedi/drivers/amplc_pci224.c
+++ b/drivers/staging/comedi/drivers/amplc_pci224.c
@@ -1196,20 +1196,12 @@ pci224_auto_attach(struct comedi_device *dev, unsigned long context_unused)
 			"BUG! cannot determine board type!\n");
 		return -EINVAL;
 	}
-	/*
-	 * Need to 'get' the PCI device to match the 'put' in pci224_detach().
-	 * TODO: Remove the pci_dev_get() and matching pci_dev_put() once
-	 * support for manual attachment of PCI devices via pci224_attach()
-	 * has been removed.
-	 */
-	pci_dev_get(pci_dev);
 	return pci224_attach_common(dev, pci_dev);
 }
 
 static void pci224_detach(struct comedi_device *dev)
 {
 	struct pci224_private *devpriv = dev->private;
-	struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 
 	if (dev->irq)
 		free_irq(dev->irq, dev);
@@ -1219,8 +1211,6 @@ static void pci224_detach(struct comedi_device *dev)
 		kfree(devpriv->ao_scan_order);
 	}
 	comedi_pci_disable(dev);
-	if (pcidev)
-		pci_dev_put(pcidev);
 }
 
 static struct comedi_driver amplc_pci224_driver = {
-- 
2.0.0

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