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Diffstat (limited to 'arch/powerpc/platforms/wsp/wsp.c')
-rw-r--r--arch/powerpc/platforms/wsp/wsp.c13
1 files changed, 7 insertions, 6 deletions
diff --git a/arch/powerpc/platforms/wsp/wsp.c b/arch/powerpc/platforms/wsp/wsp.c
index d25cc96..ddb6efe 100644
--- a/arch/powerpc/platforms/wsp/wsp.c
+++ b/arch/powerpc/platforms/wsp/wsp.c
@@ -89,6 +89,7 @@ void wsp_halt(void)
struct device_node *dn;
struct device_node *mine;
struct device_node *me;
+ int rc;
me = of_get_cpu_node(smp_processor_id(), NULL);
mine = scom_find_parent(me);
@@ -101,15 +102,15 @@ void wsp_halt(void)
/* read-modify-write it so the HW probe does not get
* confused */
- val = scom_read(m, 0);
- val |= 1;
- scom_write(m, 0, val);
+ rc = scom_read(m, 0, &val);
+ if (rc == 0)
+ scom_write(m, 0, val | 1);
scom_unmap(m);
}
m = scom_map(mine, 0, 1);
- val = scom_read(m, 0);
- val |= 1;
- scom_write(m, 0, val);
+ rc = scom_read(m, 0, &val);
+ if (rc == 0)
+ scom_write(m, 0, val | 1);
/* should never return */
scom_unmap(m);
}