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ahci: fix PORTS_IMPL override 

If PORTS_IMPL register is zero, ahci initialize it to full mask
corresponding to nr_ports in the CAP register.  hpriv->cap, which is
initialized at the end of the function, is incorrectly used as value
of CAP causing ahci to always override PORTS_IMPL to 0x1 if it's zero.
Fix it.

This fixes a bug where early ich6 ahci can only access the first port.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Tejun Heo 2007-06-19 18:52:56 +09:00 committed by Jeff Garzik
parent 3fae450c68
commit a3d2cc5e74
1 changed files with 1 additions and 1 deletions
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2
drivers/ata/ahci.c
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@ -527,7 +527,7 @@ static void ahci_save_initial_config(struct pci_dev *pdev,
/* fixup zero port_map */
if (!port_map) {
port_map = (1 << ahci_nr_ports(hpriv->cap)) - 1;
port_map = (1 << ahci_nr_ports(cap)) - 1;
dev_printk(KERN_WARNING, &pdev->dev,
"PORTS_IMPL is zero, forcing 0x%x\n", port_map);