[U-Boot] [PATCH v2] cp/cmp: Add WATCHDOG_RESET in copy and compare loop

[Stefan Roese]

On some boards with a very short watchdog timeout, the "cp" and
"cmp" commands may reset the board. This patch adds some
watchdog resets inside the loops. Otherwise for example the lwmon5
board will reset while doing something like this:

=> cp.b fc000000 1000000 100000

Signed-off-by: Stefan Roese <sr at denx.de>
---
v2:
- Changed to power of 2 value to simplify the resulting code,
  4096 seems to be enough for lwmon5.

 common/cmd_mem.c |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/common/cmd_mem.c b/common/cmd_mem.c
index 44834ea..c426997 100644
--- a/common/cmd_mem.c
+++ b/common/cmd_mem.c
@@ -337,6 +337,10 @@ int do_mem_cmp (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 		ngood++;
 		addr1 += size;
 		addr2 += size;
+
+		/* reset watchdog from time to time */
+		if ((count % 4096) == 0)
+			WATCHDOG_RESET();
 	}
 
 	printf("Total of %ld %s%s were the same\n",
@@ -447,6 +451,10 @@ int do_mem_cp ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 			*((u_char *)dest) = *((u_char *)addr);
 		addr += size;
 		dest += size;
+
+		/* reset watchdog from time to time */
+		if ((count % 4096) == 0)
+			WATCHDOG_RESET();
 	}
 	return 0;
 }
-- 
1.7.2.2