RE: [PATCH 30/90] staging: comedi: amplc_dio200: store the pci_devin the comedi_device

From: H Hartley Sweeten
Date: Thu Jul 19 2012 - 13:20:29 EST

On Thursday, July 19, 2012 3:27 AM, Ian Abbott wrote:
> On 2012-07-19 11:10, Ian Abbott wrote:
>> On 2012-07-19 02:37, H Hartley Sweeten wrote:
>>> Use the hw_dev pointer in the comedi_device struct to hold the
>>> pci_dev instead of carrying it in the private data.
>>> Since the pci_dev is no longer held in the provate data, we can
>>> also cleanup the detach a bit. Remove the IS_ENABLED() tests in
>>> the detach. If the pci_dev is non NULL it's a PCI device otherwise
>>> it's an ISA device. Using IS_ENABLED() to omit the code paths
>>> makes the code a bit confusing and doesn't save much.
>> No, you really need to check thisboard->bustype in the detach() because
>> hw_dev might be NULL for a PCI board if the attach() failed.
> Actually, your patch wouldn't do any harm as dev->iobase would be 0. It
> would just go through the "failed ISA device" path instead of the
> "failed PCI device" path. It would be more robust to check
> thisboard->bustype though.

Would this be cleaner:

If (dev->iobase) {
If (pcidev)
release_region(dev->iobase, DIO200_IO_SIZE);
If (pcidev)

Same number of lines but the i/o disable/release and the put of the pcidev
would then be distinctly separate.


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