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authorKefeng Wang <kefeng.wang@linaro.org>2014-05-14 14:13:40 +0800
committerTejun Heo <tj@kernel.org>2014-05-14 13:07:09 -0400
commit888d91a08fa8e2be4cb0eef1e5736ef68b8f77f0 (patch)
tree6d94d11eeb4f56442acfd21b8f6ca42ecb6e19d0 /drivers/ata
parent58eb8cd565af4a104395e3c10443951c1f73dafe (diff)
downloadop-kernel-dev-888d91a08fa8e2be4cb0eef1e5736ef68b8f77f0.zip
op-kernel-dev-888d91a08fa8e2be4cb0eef1e5736ef68b8f77f0.tar.gz
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>
Diffstat (limited to 'drivers/ata')
-rw-r--r--drivers/ata/ahci.h1
-rw-r--r--drivers/ata/libahci.c5
2 files changed, 6 insertions, 0 deletions
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 @@ enum {
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 @@ void ahci_save_initial_config(struct device *dev,
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);
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