libata: implement ATA_FLAG_IGN_SIMPLEX and use it in sata_uli

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.  Implement ATA_FLAG_IGN_SIMPLEX
which makes libata ignore the simplex bit and use it in sata_uli.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/libata.h b/include/linux/libata.h
index df76fc467816..22aa69e20905 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -177,6 +177,7 @@ enum {
                                               * Register FIS clearing BSY */
         ATA_FLAG_DEBUGMSG       = (1 << 13),
         ATA_FLAG_SETXFER_POLLING= (1 << 14), /* use polling for SETXFER */
+        ATA_FLAG_IGN_SIMPLEX    = (1 << 15), /* ignore SIMPLEX */
 
         /* The following flag belongs to ap->pflags but is kept in
          * ap->flags because it's referenced in many LLDs and will be