Some uli controllers have stuck SIMPLEX bit which can't be cleared
with ata_pci_clear_simplex(), but the controller is capable of doing
DMAs on both channels simultaneously. Ignore it.
Signed-off-by: Tejun Heo <htejun@xxxxxxxxx>
diff --git a/drivers/ata/sata_uli.c b/drivers/ata/sata_uli.c
index 5c603ca..62b9269 100644
--- a/drivers/ata/sata_uli.c
+++ b/drivers/ata/sata_uli.c
@@ -226,6 +226,13 @@ static int uli_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
probe_ent->private_data = hpriv;
+ /* these chips have stuck dummy simplex bit, ignore it */
+ if (probe_ent->_host_flags & ATA_HOST_SIMPLEX) {
+ dev_printk(KERN_INFO, &pdev->dev,
+ "BMDMA simplex set, ignored\n");
+ probe_ent->_host_flags &= ~ATA_HOST_SIMPLEX;
+ }
+
switch (board_idx) {
case uli_5287:
hpriv->scr_cfg_addr[0] = ULI5287_BASE;
-
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