On 2012-07-19 02:30, H Hartley Sweeten wrote:
Use pci_is_enabled() in the "find pci device" function to determine if the found pci device is not in use and move the comedi_pci_enable() call into the attach. Signed-off-by: H Hartley Sweeten <hsweeten@xxxxxxxxxxxxxxxxxxx> Cc: Ian Abbott <abbotti@xxxxxxxxx> Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/staging/comedi/drivers/adv_pci1723.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/staging/comedi/drivers/adv_pci1723.c b/drivers/staging/comedi/drivers/adv_pci1723.c index f561a2a..e971fa6 100644 --- a/drivers/staging/comedi/drivers/adv_pci1723.c +++ b/drivers/staging/comedi/drivers/adv_pci1723.c @@ -302,11 +302,7 @@ static struct pci_dev *pci1723_find_pci_dev(struct comedi_device *dev, } if (pcidev->vendor != PCI_VENDOR_ID_ADVANTECH) continue; - /* - * Look for device that isn't in use. - * Enable PCI device and request regions. - */ - if (comedi_pci_enable(pcidev, "adv_pci1723")) + if (pci_is_enabled(pcidev)) continue; return pcidev; }
Just because the device is enabled doesn't mean that it is in use, so this change could skip over a perfectly good unused device.
If you want to move the comedi_pci_enable() call, this is a change in behaviour for this particular driver, but is consistent with most of the other Comedi PCI drivers (and the bus/slot options can be used to select a particular device). This is probably a good thing, but you should take out the pci_is_enabled test.
@@ -335,6 +331,10 @@ static int pci1723_attach(struct comedi_device *dev, if (!devpriv->pcidev) return -EIO; + ret = comedi_pci_enable(devpriv->pcidev, "adv_pci1723"); + if (ret) + return ret; + dev->iobase = pci_resource_start(devpriv->pcidev, 2); dev->board_name = this_board->name;
-- -=( Ian Abbott @ MEV Ltd. E-mail: <abbotti@xxxxxxxxx> )=- -=( Tel: +44 (0)161 477 1898 FAX: +44 (0)161 718 3587 )=- _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/devel
