Messages in this thread Patch in this message | | | Date | Thu, 01 Jul 2010 10:34:58 -0700 | From | Greg KH <> | Subject | [patch 112/164] sata_via: magic vt6421 fix for transmission problems w/ WD drives |
| |
2.6.33-stable review patch. If anyone has any objections, please let me know.
------------------
From: Tejun Heo <tj@kernel.org>
commit 8b27ff4cf6d15964aa2987aeb58db4dfb1f87a19 upstream.
vt6421 has problems talking to recent WD drives. It causes a lot of transmission errors while high bandwidth transfer as reported in the following bugzilla entry.
https://bugzilla.kernel.org/show_bug.cgi?id=15173
Joseph Chan provided the following fix. I don't have any idea what it does but I can verify the issue is gone with the patch applied.
Signed-off-by: Tejun Heo <tj@kernel.org> Originally-from: Joseph Chan <JosephChan@via.com.tw> Reported-by: Jorrit Tijben <sjorrit@gmail.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- drivers/ata/sata_via.c | 13 +++++++++++++ 1 file changed, 13 insertions(+)
--- a/drivers/ata/sata_via.c +++ b/drivers/ata/sata_via.c @@ -558,6 +558,19 @@ static void svia_configure(struct pci_de tmp8 |= NATIVE_MODE_ALL; pci_write_config_byte(pdev, SATA_NATIVE_MODE, tmp8); } + + /* + * vt6421 has problems talking to some drives. The following + * is the magic fix from Joseph Chan <JosephChan@via.com.tw>. + * Please add proper documentation if possible. + * + * https://bugzilla.kernel.org/show_bug.cgi?id=15173 + */ + if (pdev->device == 0x3249) { + pci_read_config_byte(pdev, 0x52, &tmp8); + tmp8 |= 1 << 2; + pci_write_config_byte(pdev, 0x52, tmp8); + } } static int svia_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
| |