author: Larry Finger <Larry.Finger@lwfinger.net> 2010-10-20 09:59:33 -0500
committer: John W. Linville <linville@tuxdriver.com> 2010-11-15 13:23:28 -0500
commit: e081685c1bbe8da37c7f61726fdb783ff277f14f
parent: 14fb7c17e97ea0fcc545393fb1f34e6541647b5b
Commit Summary:
Diffstat:
1 file changed, 7 insertions, 0 deletions
diff --git a/drivers/ssb/pcihost_wrapper.c b/drivers/ssb/pcihost_wrapper.c
index 6536a041d90d..f6c8c81a0025 100644
--- a/drivers/ssb/pcihost_wrapper.c
+++ b/drivers/ssb/pcihost_wrapper.c
@@ -59,6 +59,7 @@ static int ssb_pcihost_probe(struct pci_dev *dev,
struct ssb_bus *ssb;
int err = -ENOMEM;
const char *name;
+ u32 val;
ssb = kzalloc(sizeof(*ssb), GFP_KERNEL);
if (!ssb)
@@ -74,6 +75,12 @@ static int ssb_pcihost_probe(struct pci_dev *dev,
goto err_pci_disable;
pci_set_master(dev);
+ /* Disable the RETRY_TIMEOUT register (0x41) to keep
+ * PCI Tx retries from interfering with C3 CPU state */
+ pci_read_config_dword(dev, 0x40, &val);
+ if ((val & 0x0000ff00) != 0)
+ pci_write_config_dword(dev, 0x40, val & 0xffff00ff);
+
err = ssb_bus_pcibus_register(ssb, dev);
if (err)
goto err_pci_release_regions;