[U-Boot] [PATCH] arm: socfpga: dm: Fix DM initialization failure after warm reset

[Jian Luo <Jian.Luo4@boschrexroth.de>]

gd->dm_root is not cleared in SPL after warm reset.
This might cause DM initilazation failure.

Signed-off-by: Jian Luo <jian.luo4@boschrexroth.de>
---
  arch/arm/mach-socfpga/spl.c | 6 ++++++
  1 file changed, 6 insertions(+)

diff --git a/arch/arm/mach-socfpga/spl.c b/arch/arm/mach-socfpga/spl.c
index 13ec24b..59fe1f2 100644
--- a/arch/arm/mach-socfpga/spl.c
+++ b/arch/arm/mach-socfpga/spl.c
@@ -181,5 +181,11 @@ void board_init_f(ulong dummy)
         /* Configure simple malloc base pointer into RAM. */
         gd->malloc_base = CONFIG_SYS_TEXT_BASE + (1024 * 1024);

+       /*
+        * gd->dm_root might contain non-zero value after warm reset.
+        * Clear it to avoid dm_init error
+        */
+       gd->dm_root = NULL;
+
         board_init_r(NULL, 0);
  }
-- 
1.9.1