Commit d6250a03 authored Nov 30, 2009 by Alan Cox Committed by Jeff Garzik Dec 03, 2009

pata_ali: Fix regression with old devices



Making the new stuff work broke some of the old chipsets. We need to go
back to the old set up values for these it seems. Unfortunately even with
documentation this is basically a mix of cargoculting and guesswork.

Chased down to the exact line by Gianluca.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

parent be315d46

drivers/ata/pata_ali.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -453,7 +453,9 @@ static void ali_init_chipset(struct pci_dev *pdev)
		/* Clear CD-ROM DMA write bit */
		tmp &= 0x7F;
		/* Cable and UDMA */
		pci_write_config_byte(pdev, 0x4B, tmp \| 0x09);
		if (pdev->revision >= 0xc2)
		tmp \|= 0x01;
		pci_write_config_byte(pdev, 0x4B, tmp \| 0x08);
		/*
		* CD_ROM DMA on (0x53 bit 0). Enable this even if we want
		* to use PIO. 0x53 bit 1 (rev 20 only) - enable FIFO control

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