ata: ahci: append new hflag AHCI_HFLAG_NO_FBS
Append AHCI_HFLAG_NO_FBS to force turning off FBS flag.
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org>
Signed-off-by: Kefeng Wang <kefeng.wang@linaro.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
diff --git a/drivers/ata/ahci.h b/drivers/ata/ahci.h
index 51af275..60db49b 100644
--- a/drivers/ata/ahci.h
+++ b/drivers/ata/ahci.h
@@ -235,6 +235,7 @@
port start (wait until
error-handling stage) */
AHCI_HFLAG_MULTI_MSI = (1 << 16), /* multiple PCI MSIs */
+ AHCI_HFLAG_NO_FBS = (1 << 17), /* no FBS */
/* ap->flags bits */
diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c
index 6bd4f66..e1cf859 100644
--- a/drivers/ata/libahci.c
+++ b/drivers/ata/libahci.c
@@ -457,6 +457,11 @@
cap |= HOST_CAP_FBS;
}
+ if ((cap & HOST_CAP_FBS) && (hpriv->flags & AHCI_HFLAG_NO_FBS)) {
+ dev_info(dev, "controller can't do FBS, turning off CAP_FBS\n");
+ cap &= ~HOST_CAP_FBS;
+ }
+
if (force_port_map && port_map != force_port_map) {
dev_info(dev, "forcing port_map 0x%x -> 0x%x\n",
port_map, force_port_map);