From: Liam Beguin <liambeguin@gmail.com>
Date: Wed, 14 Mar 2018 23:15:11 +0000 (-0400)
Subject: cmd: sf: fix map_physmem check
X-Git-Tag: v2018.05-rc1~24
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=10f087f73fff024c81439b50423ba69589d5c161;p=oweals%2Fu-boot.git

cmd: sf: fix map_physmem check

Make sure 0x00 is a valid address to read to. If `addr` is 0x00 then
map_physmem() will return 0 which should be a valid address.

Signed-off-by: Liam Beguin <liambeguin@gmail.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
---

diff --git a/cmd/sf.c b/cmd/sf.c
index f971eec781..e7ff9a6462 100644
--- a/cmd/sf.c
+++ b/cmd/sf.c
@@ -287,7 +287,7 @@ static int do_spi_flash_read_write(int argc, char * const argv[])
 	}
 
 	buf = map_physmem(addr, len, MAP_WRBACK);
-	if (!buf) {
+	if (!buf && addr) {
 		puts("Failed to map physical memory\n");
 		return 1;
 	}