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sata_via: apply magic FIFO fix to vt6420 too

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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: Tejun Heo <tj@kernel.org>
Reported-by: Martin Qvist <q@maq.dk>
Reported-by: Peter Zijlstra <peterz@infradead.org>
Cc: Joseph Chan <JosephChan@via.com.tw>
Cc: stable@kernel.org
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Tejun Heo 2010-11-19 15:29:19 +01:00 committed by Jeff Garzik
parent 589136bfa7
commit b1353e4f40
1 changed files with 5 additions and 4 deletions
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9
drivers/ata/sata_via.c
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@ -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,