[U-Boot] [PATCH 1/1] imx6: fix random hang when download by usb

[Frank Li]

ROM did not invalidate L1 cache when download by usb
Need invalidate L1 cache before enable cache

Signed-off-by: Huang yongcai <b20788 at freescale.com>
Signed-off-by: Frank Li <Frank.Li at freescale.com>
---
 arch/arm/cpu/armv7/mx6/soc.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/arch/arm/cpu/armv7/mx6/soc.c b/arch/arm/cpu/armv7/mx6/soc.c
index bc65767..2cbab4e 100644
--- a/arch/arm/cpu/armv7/mx6/soc.c
+++ b/arch/arm/cpu/armv7/mx6/soc.c
@@ -117,6 +117,8 @@ int arch_cpu_init(void)
 #ifndef CONFIG_SYS_DCACHE_OFF
 void enable_caches(void)
 {
+	/* Avoid random hang when download by usb */
+	invalidate_dcache_all();
 	/* Enable D-cache. I-cache is already enabled in start.S */
 	dcache_enable();
 }
-- 
1.7.6