PCI: Use pci_find_ht_capability() in drivers/pci/quirks.c

Use pci_find_ht_capability() in drivers/pci/quirks.c.

I'm pretty sure the logic is unchanged here, but someone please eye-ball it
for me. I've changed the message to be a little shorter, it's now:

PCI: Found (enabled|disabled) HT MSI mapping on xxxx:xx:xx.x

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 16 insertions, 12 deletions

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 757186390d83..cf3e7c0ded3f 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -1644,19 +1644,23 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8131_BRIDGE, quirk_
  * return 1 if a HT MSI capability is found and enabled */
 static int __devinit msi_ht_cap_enabled(struct pci_dev *dev)
 {
-        u8 pos;
-        int ttl;
-        for (pos = pci_find_capability(dev, PCI_CAP_ID_HT), ttl = 48;
-             pos && ttl;
-             pos = pci_find_next_capability(dev, pos, PCI_CAP_ID_HT), ttl--) {
-                u32 cap_hdr;
-                /* MSI mapping section according to Hypertransport spec */
-                if (pci_read_config_dword(dev, pos, &cap_hdr) == 0
-                    && (cap_hdr & 0xf8000000) == 0xa8000000 /* MSI mapping */) {
-                        printk(KERN_INFO "PCI: Found HT MSI mapping on %s with capability %s\n",
-                               pci_name(dev), cap_hdr & 0x10000 ? "enabled" : "disabled");
-                        return (cap_hdr & 0x10000) != 0; /* MSI mapping cap enabled */
+        int pos, ttl = 48;
+
+        pos = pci_find_ht_capability(dev, HT_CAPTYPE_MSI_MAPPING);
+        while (pos && ttl--) {
+                u8 flags;
+
+                if (pci_read_config_byte(dev, pos + HT_MSI_FLAGS,
+                                         &flags) == 0)
+                {
+                        printk(KERN_INFO "PCI: Found %s HT MSI Mapping on %s\n",
+                                flags & HT_MSI_FLAGS_ENABLE ?
+                                "enabled" : "disabled", pci_name(dev));
+                        return (flags & HT_MSI_FLAGS_ENABLE) != 0;
                 }
+
+                pos = pci_find_next_ht_capability(dev, pos,
+                                                  HT_CAPTYPE_MSI_MAPPING);
         }
         return 0;
 }