Blackfin arch: If we double fault, rather than hang forever, reset

Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

1 files changed, 5 insertions, 2 deletions

diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c
index c2248fe80588..23e637eb78da 100644
--- a/arch/blackfin/kernel/setup.c
+++ b/arch/blackfin/kernel/setup.c
@@ -771,6 +771,9 @@ void __init setup_arch(char **cmdline_p)
 
         _bfin_swrst = bfin_read_SWRST();
 
+        /* If we double fault, reset the system - otherwise we hang forever */
+        bfin_write_SWRST(DOUBLE_FAULT);
+
         if (_bfin_swrst & RESET_DOUBLE)
                 printk(KERN_INFO "Recovering from Double Fault event\n");
         else if (_bfin_swrst & RESET_WDOG)
@@ -1017,10 +1020,10 @@ static int show_cpuinfo(struct seq_file *m, void *v)
         }
 
         /* Is it turned on? */
-        if (bfin_read_DMEM_CONTROL() & (ENDCPLB | DMC_ENABLE) != (ENDCPLB | DMC_ENABLE))
+        if ((bfin_read_DMEM_CONTROL() & (ENDCPLB | DMC_ENABLE)) != (ENDCPLB | DMC_ENABLE))
                 dcache_size = 0;
 
-        if (bfin_read_IMEM_CONTROL() & (IMC | ENICPLB) == (IMC | ENICPLB))
+        if ((bfin_read_IMEM_CONTROL() & (IMC | ENICPLB)) == (IMC | ENICPLB))
                 icache_size = 0;
 
         seq_printf(m, "cache size\t: %d KB(L1 icache) "