sata_mv: enable async_notify for 60x1 Rev.C0 and higher

The early chipsets cannot safely handle Async Notification (AN),
but 6041/6081 chip revision "C0" (and newer) can handle it.

So allow AN for "C0" and higher.

This enables use of hotplug on PMP ports for the 6041/6081 PCI Rev.9 chips.

Signed-off-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index 60391e9..75fde48 100644 (file)
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -1322,6 +1322,9 @@ static int mv_port_start(struct ata_port *ap)
                goto out_port_free_dma_mem;
        memset(pp->crpb, 0, MV_CRPB_Q_SZ);
 
+       /* 6041/6081 Rev. "C0" (and newer) are okay with async notify */
+       if (hpriv->hp_flags & MV_HP_ERRATA_60X1C0)
+               ap->flags |= ATA_FLAG_AN;
        /*
         * For GEN_I, there's no NCQ, so we only allocate a single sg_tbl.
         * For later hardware, we need one unique sg_tbl per NCQ tag.