Commit b1353e4f authored by Tejun Heo's avatar Tejun Heo Committed by Jeff Garzik
Browse files

sata_via: apply magic FIFO fix to vt6420 too 



vt6420 has the same FIFO overflow problem as vt6421 when combined with
certain devices.  This patch applies the magic fix to vt6420 too.

Signed-off-by: default avatarTejun Heo <tj@kernel.org>
Reported-by: default avatarMartin Qvist <q@maq.dk>
Reported-by: default avatarPeter Zijlstra <peterz@infradead.org>
Cc: Joseph Chan <JosephChan@via.com.tw>
Cc: stable@kernel.org
Signed-off-by: default avatarJeff Garzik <jgarzik@redhat.com>
parent 589136bf

drivers/ata/sata_via.c

+5 −4
Original line number Diff line number Diff line
@@ -538,7 +538,7 @@ static int vt8251_prepare_host(struct pci_dev *pdev, struct ata_host **r_host) 
	return 0;

}



static void svia_configure(struct pci_dev *pdev)

static void svia_configure(struct pci_dev *pdev, int board_id)

{

	u8 tmp8;
@@ -577,7 +577,7 @@ static void svia_configure(struct pci_dev *pdev) 
	}



	/*

	 * vt6421 has problems talking to some drives.  The following

	 * vt6420/1 has problems talking to some drives.  The following

	 * is the fix from Joseph Chan <JosephChan@via.com.tw>.

	 *

	 * When host issues HOLD, device may send up to 20DW of data
@@ -596,8 +596,9 @@ static void svia_configure(struct pci_dev *pdev) 
	 *

	 * https://bugzilla.kernel.org/show_bug.cgi?id=15173

	 * http://article.gmane.org/gmane.linux.ide/46352

	 * http://thread.gmane.org/gmane.linux.kernel/1062139

	 */

	if (pdev->device == 0x3249) {

	if (board_id == vt6420 || board_id == vt6421) {

		pci_read_config_byte(pdev, 0x52, &tmp8);

		tmp8 |= 1 << 2;

		pci_write_config_byte(pdev, 0x52, tmp8);
@@ -652,7 +653,7 @@ static int svia_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) 
	if (rc)

		return rc;



	svia_configure(pdev);

	svia_configure(pdev, board_id);



	pci_set_master(pdev);

	return ata_host_activate(host, pdev->irq, ata_bmdma_interrupt,

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