PCI: Only check the HT capability bits in mpic.c

Only compare the exact HT capability bits against HT_CAPTYPE_IRQ,
this is a little paranoid, but doesn't hurt.

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

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c
index 411480d5c626..d01ced11694d 100644
--- a/arch/powerpc/sysdev/mpic.c
+++ b/arch/powerpc/sysdev/mpic.c
@@ -390,7 +390,7 @@ static void __init mpic_scan_ht_pic(struct mpic *mpic, u8 __iomem *devbase,
                 u8 id = readb(devbase + pos + PCI_CAP_LIST_ID);
                 if (id == PCI_CAP_ID_HT) {
                         id = readb(devbase + pos + 3);
-                        if (id == HT_CAPTYPE_IRQ)
+                        if ((id & HT_5BIT_CAP_MASK) == HT_CAPTYPE_IRQ)
                                 break;
                 }
         }