[U-Boot] [PATCH] mem_mtest: bail out after finding 1st memory error.

[Paul Gortmaker]

The basic memtest function tries to watch for ^C after each
pattern pass as an escape mechanism, but if things are horribly
wrong, we'll be stuck in an inner loop flooding the console with
error messages and never check for ^C.  To make matters worse,
if the user waits for all the error messages to complete, we
then incorrectly report the test passed without errors.

By inspecting the code, it is clear that the test was originally
written with returning after the 1st error in mind (which is what
the optional more extensive test does).  Making it do this also
solves the endless console flood problem if a person tests really
bad RAM.

Signed-off-by: Paul Gortmaker <paul.gortmaker at windriver.com>
---
 common/cmd_mem.c |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/common/cmd_mem.c b/common/cmd_mem.c
index 9850800..abcd8fd 100644
--- a/common/cmd_mem.c
+++ b/common/cmd_mem.c
@@ -631,7 +631,6 @@ int do_mem_mtest (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 	vu_long	*addr, *start, *end;
 	ulong	val;
 	ulong	readback;
-	int     rcode = 0;
 	int iterations = 1;
 	int iteration_limit;
 
@@ -923,7 +922,7 @@ int do_mem_mtest (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 				printf ("\nMem error @ 0x%08X: "
 					"found %08lX, expected %08lX\n",
 					(uint)addr, readback, val);
-				rcode = 1;
+				return 1;
 			}
 			val += incr;
 		}
@@ -943,7 +942,7 @@ int do_mem_mtest (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 		incr = -incr;
 	}
 #endif
-	return rcode;
+	return 0;
 }
 
 
-- 
1.6.5.rc1