1 files changed, 9 insertions, 0 deletions

diff --git a/arch/blackfin/mach-bf561/hotplug.c b/arch/blackfin/mach-bf561/hotplug.c
index 42fc085629c7..0123117b8ff2 100644
--- a/arch/blackfin/mach-bf561/hotplug.c
+++ b/arch/blackfin/mach-bf561/hotplug.c
@@ -7,6 +7,7 @@
 
 #include <linux/smp.h>
 #include <asm/blackfin.h>
+#include <asm/cacheflush.h>
 #include <mach/pll.h>
 
 int hotplug_coreb;
@@ -14,8 +15,16 @@ int hotplug_coreb;
 void platform_cpu_die(void)
 {
         unsigned long iwr;
+
         hotplug_coreb = 1;
 
+        /*
+         * When CoreB wakes up, the code in _coreb_trampoline_start cannot
+         * turn off the data cache. This causes the CoreB failed to boot.
+         * As a workaround, we invalidate all the data cache before sleep.
+         */
+        blackfin_invalidate_entire_dcache();
+
         /* disable core timer */
         bfin_write_TCNTL(0);