[IA64] workaround tiger ia64_sal_get_physical_id_info hang

This fixes regression introduced in 113134fcbca83619be4c68d0ca66db6093777b5d

Intel Tiger platforms hang when calling SAL_GET_PHYSICAL_ID_INFO
instead of properly returning -1 for unimplemented, so add a
version check.

SGI Altix platforms have an incorrect SAL version hard-coded into
their prom -- they encode 2.9, but actually implement 3.2 -- so
fix it up and allow ia64_sal_get_physical_id_info to keep
working.

Signed-off-by: Alex Chiang <achiang@hp.com>
Acked-by: Russ Anderson <rja@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 4 insertions, 0 deletions

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;