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pata_atiixp: add proper ->prereset method 

Fixes PCI access before PCI resources are allocated.

Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2011-10-11 19:55:09 +02:00 committed by Jeff Garzik
parent d912be2f3b
commit 46b9e77076
1 changed files with 26 additions and 9 deletions
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35
drivers/ata/pata_atiixp.c
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@ -48,6 +48,31 @@ static int atiixp_cable_detect(struct ata_port *ap)
static DEFINE_SPINLOCK(atiixp_lock);
/**
* atiixp_prereset - perform reset handling
* @link: ATA link
* @deadline: deadline jiffies for the operation
*
* Reset sequence checking enable bits to see which ports are
* active.
*/
static int atiixp_prereset(struct ata_link *link, unsigned long deadline)
{
static const struct pci_bits atiixp_enable_bits[] = {
{ 0x48, 1, 0x01, 0x00 },
{ 0x48, 1, 0x08, 0x00 }
};
struct ata_port *ap = link->ap;
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
if (!pci_test_config_bits(pdev, &atiixp_enable_bits[ap->port_no]))
return -ENOENT;
return ata_sff_prereset(link, deadline);
}
/**
* atiixp_set_pio_timing - set initial PIO mode data
* @ap: ATA interface
@ -221,6 +246,7 @@ static struct ata_port_operations atiixp_port_ops = {
.bmdma_start = atiixp_bmdma_start,
.bmdma_stop = atiixp_bmdma_stop,
.prereset = atiixp_prereset,
.cable_detect = atiixp_cable_detect,
.set_piomode = atiixp_set_piomode,
.set_dmamode = atiixp_set_dmamode,
@ -235,16 +261,7 @@ static int atiixp_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
.udma_mask = ATA_UDMA5,
.port_ops = &atiixp_port_ops
};
static const struct pci_bits atiixp_enable_bits[] = {
{ 0x48, 1, 0x01, 0x00 },
{ 0x48, 1, 0x08, 0x00 }
};
const struct ata_port_info *ppi[] = { &info, &info };
int i;
for (i = 0; i < 2; i++)
if (!pci_test_config_bits(pdev, &atiixp_enable_bits[i]))
ppi[i] = &ata_dummy_port_info;
return ata_pci_bmdma_init_one(pdev, ppi, &atiixp_sht, NULL,
ATA_HOST_PARALLEL_SCAN);