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[SCSI] aic7xxx: lost multifunction flags handling

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From: Christoph Hellwig <hch@lst.de>

Multi-function cards need to inherit the PCI flags from the master PCI
device.

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
James Bottomley 2005-08-13 09:42:45 -05:00
parent 0336ee5aed
commit 3a4f5c60db
1 changed files with 29 additions and 0 deletions
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29
drivers/scsi/aic7xxx/aic7xxx_osm_pci.c
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@ -149,6 +149,27 @@ ahc_linux_pci_dev_remove(struct pci_dev *pdev)
ahc_free(ahc);
}
static void
ahc_linux_pci_inherit_flags(struct ahc_softc *ahc)
{
struct pci_dev *pdev = ahc->dev_softc, *master_pdev;
unsigned int master_devfn = PCI_DEVFN(PCI_SLOT(pdev->devfn), 0);
master_pdev = pci_get_slot(pdev->bus, master_devfn);
if (master_pdev) {
struct ahc_softc *master = pci_get_drvdata(master_pdev);
if (master) {
ahc->flags &= ~AHC_BIOS_ENABLED;
ahc->flags |= master->flags & AHC_BIOS_ENABLED;
ahc->flags &= ~AHC_PRIMARY_CHANNEL;
ahc->flags |= master->flags & AHC_PRIMARY_CHANNEL;
} else
printk(KERN_ERR "aic7xxx: no multichannel peer found!\n");
pci_dev_put(master_pdev);
}
}
static int
ahc_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
@ -203,6 +224,14 @@ ahc_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
ahc_free(ahc);
return (-error);
}
/*
* Second Function PCI devices need to inherit some
* settings from function 0.
*/
if ((ahc->features & AHC_MULTI_FUNC) && PCI_FUNC(pdev->devfn) != 0)
ahc_linux_pci_inherit_flags(ahc);
pci_set_drvdata(pdev, ahc);
ahc_linux_register_host(ahc, &aic7xxx_driver_template);
return (0);