linux-kernel - RE: [PATCH 30/90] staging: comedi: amplc_dio200: store the pci_dev in the comedi

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Message-ID: <ADE657CA350FB648AAC2C43247A983F00206AA916474@AUSP01VMBX24.collaborationhost.net>
Date:	Thu, 19 Jul 2012 12:14:30 -0500
From:	H Hartley Sweeten <hartleys@...ionengravers.com>
To:	Ian Abbott <abbotti@....co.uk>
CC:	Linux Kernel <linux-kernel@...r.kernel.org>,
	"devel@...verdev.osuosl.org" <devel@...verdev.osuosl.org>,
	Ian Abbott <ian.abbott@....co.uk>,
	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
Subject: RE: [PATCH 30/90] staging: comedi: amplc_dio200: store the pci_dev
 in the comedi_device

On Thursday, July 19, 2012 3:11 AM, 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.

Ah, overlooked that.

I still think the IS_ENABLED() stuff should be removed where possible. It
just looks confusing in the if().

Regards,
Hartley