2 files changed, 11 insertions, 0 deletions

diff --git a/arch/ia64/kernel/sal.c b/arch/ia64/kernel/sal.c
index f44fe8412162..a3022dc48ef8 100644
--- a/arch/ia64/kernel/sal.c
+++ b/arch/ia64/kernel/sal.c
@@ -109,6 +109,13 @@ check_versions (struct ia64_sal_systab *systab)
                 sal_revision = SAL_VERSION_CODE(2, 8);
                 sal_version = SAL_VERSION_CODE(0, 0);
         }
+
+        if (ia64_platform_is("sn2") && (sal_revision == SAL_VERSION_CODE(2, 9)))
+                /*
+                 * SGI Altix has hard-coded version 2.9 in their prom
+                 * but they actually implement 3.2, so let's fix it here.
+                 */
+                sal_revision = SAL_VERSION_CODE(3, 2);
 }
 
 static void __init
diff --git a/include/asm-ia64/sal.h b/include/asm-ia64/sal.h
index 2251118894ae..f4904db3b057 100644
--- a/include/asm-ia64/sal.h
+++ b/include/asm-ia64/sal.h
@@ -807,6 +807,10 @@ static inline s64
 ia64_sal_physical_id_info(u16 *splid)
 {
         struct ia64_sal_retval isrv;
+
+        if (sal_revision < SAL_VERSION_CODE(3,2))
+                return -1;
+
         SAL_CALL(isrv, SAL_PHYSICAL_ID_INFO, 0, 0, 0, 0, 0, 0, 0);
         if (splid)
                 *splid = isrv.v0;