x86, gart: fix gart detection for Fam11h CPUs

Impact: fix AMD Family 11h boot hangs / USB device problems

The AMD Fam11h CPUs have a K8 northbridge. This northbridge is different
from other family's because it lacks GART support (as I just learned).

But the kernel implicitly expects a GART if it finds an AMD northbridge.

Fix this by removing the Fam11h northbridge id from the scan list of K8
northbridges. This patch also changes the message in the GART driver
about missing K8 northbridges to tell that the GART is missing which is
the correct information in this case.

Reported-by: Jouni Malinen <jkmalinen@gmail.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/arch/x86/kernel/k8.c b/arch/x86/kernel/k8.c
index 304d8bad6559f94f0e278e80496ca841741574b4..cbc4332a77b25927947d18c69f47188465a29d3e 100644 (file)
--- a/arch/x86/kernel/k8.c
+++ b/arch/x86/kernel/k8.c
@@ -18,7 +18,6 @@ static u32 *flush_words;
 struct pci_device_id k8_nb_ids[] = {
        { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_K8_NB_MISC) },
        { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_10H_NB_MISC) },
-       { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_11H_NB_MISC) },
        {}
 };
 EXPORT_SYMBOL(k8_nb_ids);

diff --git a/arch/x86/kernel/pci-gart_64.c b/arch/x86/kernel/pci-gart_64.c
index e3f75bbcedea9287d8941897004e25159b3e9796..a42b02b4df68855714b4ea2f7f3e580e0327e7b3 100644 (file)
--- a/arch/x86/kernel/pci-gart_64.c
+++ b/arch/x86/kernel/pci-gart_64.c
@@ -744,7 +744,7 @@ void __init gart_iommu_init(void)
        long i;
 
        if (cache_k8_northbridges() < 0 || num_k8_northbridges == 0) {
-               printk(KERN_INFO "PCI-GART: No AMD northbridge found.\n");
+               printk(KERN_INFO "PCI-GART: No AMD GART found.\n");
                return;
        }