--- drivers/ata/sata_via.c

+++ 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)