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Commit bab5b32a authored by Tejun Heo's avatar Tejun Heo Committed by Jeff Garzik
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pata_hpt366: fix cable detection, 



pata_hpt366 is strange in that its two channels occupy two PCI
functions and both are primary channels and bit1 of PCI configuration
register 0x5A indicates cable for both channels.

Signed-off-by: default avatarTejun Heo <tj@kernel.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: default avatarJeff Garzik <jgarzik@redhat.com>
parent d10d491f

drivers/ata/pata_hpt366.c

+6 −2
Original line number Diff line number Diff line
@@ -211,11 +211,15 @@ static u32 hpt36x_find_mode(struct ata_port *ap, int speed) 


static int hpt36x_cable_detect(struct ata_port *ap)

{

	u8 ata66;

	struct pci_dev *pdev = to_pci_dev(ap->host->dev);

	u8 ata66;



	/*

	 * Each channel of pata_hpt366 occupies separate PCI function

	 * as the primary channel and bit1 indicates the cable type.

	 */

	pci_read_config_byte(pdev, 0x5A, &ata66);

	if (ata66 & (1 << ap->port_no))

	if (ata66 & 2)

		return ATA_CBL_PATA40;

	return ATA_CBL_PATA80;

}