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SubjectRe: [PATCH 4/6] staging: comedi: addi_apci_1564: simplify the PCI bar reading and don't read the unused bars
On 2014-04-27 02:37, Chase Southwood wrote:
> This driver only uses PCI bar 1 (devpriv->i_IobaseAmcc), and PCI bar 2
> (dev->iobase) doon't bother reading the unused PCI bars.
>
> Signed-off-by: Chase Southwood <chase.southwood@gmail.com>
> Cc: Ian Abbott <abbotti@mev.co.uk>
> Cc: H Hartley Sweeten <hsweeten@visionengravers.com>
> ---
>
> Hartley,
>
> As far as I can tell from reading the I/O Mapping you sent me, these bar
> numbers are correct, but it seems a bit odd, so please offer correction
> if I am interpreting the document incorrectly.
>
> Thanks,
> Chase
>
> drivers/staging/comedi/drivers/addi_apci_1564.c | 11 ++---------
> 1 file changed, 2 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/staging/comedi/drivers/addi_apci_1564.c b/drivers/staging/comedi/drivers/addi_apci_1564.c
> index fe42f9d..7e42d47 100644
> --- a/drivers/staging/comedi/drivers/addi_apci_1564.c
> +++ b/drivers/staging/comedi/drivers/addi_apci_1564.c
> @@ -65,15 +65,8 @@ static int apci1564_auto_attach(struct comedi_device *dev,
> if (ret)
> return ret;
>
> - if (this_board->i_IorangeBase1)
> - dev->iobase = pci_resource_start(pcidev, 1);
> - else
> - dev->iobase = pci_resource_start(pcidev, 0);
> -
> - devpriv->iobase = dev->iobase;
> - devpriv->i_IobaseAmcc = pci_resource_start(pcidev, 0);
> - devpriv->i_IobaseAddon = pci_resource_start(pcidev, 2);
> - devpriv->i_IobaseReserved = pci_resource_start(pcidev, 3);
> + dev->iobase = pci_resource_start(pcidev, 2);
> + devpriv->i_IobaseAmcc = pci_resource_start(pcidev, 1);

I'm sure the original resources are correct, so since
this_board->i_IorangeBase1 is non-zero:

dev->iobase = pci_resource_start(pcidev, 1);
devpriv->i_IobaseAmcc = pci_resource_start(pcidev, 0);

I suspect the member name 'i_IobaseAmcc' is just a hangover from the
distant past and could just be changed to 'iobasemain' or something,
since most of the code seems to use it.

--
-=( Ian Abbott @ MEV Ltd. E-mail: <abbotti@mev.co.uk> )=-
-=( Tel: +44 (0)161 477 1898 FAX: +44 (0)161 718 3587 )=-


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