Re: [PATCH 1/9] libata: PCI device should be powered up before being accessed

Tejun Heo wrote: PCI device should be powered up or powered up before its PCI regsiters are accessed. Although PCI configuration register access is allowed in D3hot, PCI device is free to reset its status when transiting from D3hot to D0 causing configuration data to change. Many libata SFF

Re: [PATCH 1/9] libata: PCI device should be powered up before being accessed

Tejun Heo wrote: diff --git a/drivers/ata/pata_ali.c b/drivers/ata/pata_ali.c index 7e68edf..5ef6594 100644 --- a/drivers/ata/pata_ali.c +++ b/drivers/ata/pata_ali.c @@ -597,6 +597,11 @@ static int ali_init_one(struct pci_dev *pdev, const struct pci_device_id *id) const struct