From: Stephen Warren <swar...@nvidia.com>
The "mmc rescan" command takes no arguments. However, executing
"mmc rescan 1" succeeds, leading the user to believe that MMC device 1
has been rescanned. In fact, the "current" MMC device has been
rescanned, and the current device may well not be 1. Add error-checking
to the "mmc" command to explicitly reject any extra command-line
arguments so that it's more obvious when U-Boot isn't doing what the
user thought they asked it to.
Signed-off-by: Stephen Warren <swar...@nvidia.com>
---
common/cmd_mmc.c | 14 ++++++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)
diff --git a/common/cmd_mmc.c b/common/cmd_mmc.c
index 8c53a10..9f3d6c5 100644
--- a/common/cmd_mmc.c
+++ b/common/cmd_mmc.c
@@ -164,8 +164,12 @@ static int do_mmcops(cmd_tbl_t *cmdtp, int flag, int argc,
char * const argv[])
}
if (strcmp(argv[1], "rescan") == 0) {
- struct mmc *mmc = find_mmc_device(curr_device);
+ struct mmc *mmc;
+ if (argc != 2)
+ return CMD_RET_USAGE;
+
+ mmc = find_mmc_device(curr_device);
if (!mmc) {
printf("no mmc device at slot %x\n", curr_device);
return 1;
@@ -179,8 +183,12 @@ static int do_mmcops(cmd_tbl_t *cmdtp, int flag, int argc,
char * const argv[])
return 0;
} else if (strncmp(argv[1], "part", 4) == 0) {
block_dev_desc_t *mmc_dev;
- struct mmc *mmc = find_mmc_device(curr_device);
+ struct mmc *mmc;
+
+ if (argc != 2)
+ return CMD_RET_USAGE;
+ mmc = find_mmc_device(curr_device);
if (!mmc) {
printf("no mmc device at slot %x\n", curr_device);
return 1;
@@ -196,6 +204,8 @@ static int do_mmcops(cmd_tbl_t *cmdtp, int flag, int argc,
char * const argv[])
puts("get mmc type error!\n");
return 1;
} else if (strcmp(argv[1], "list") == 0) {
+ if (argc != 2)
+ return CMD_RET_USAGE;
print_mmc_devices('\n');
return 0;
} else if (strcmp(argv[1], "dev") == 0) {
--
1.7.10.4
_______________________________________________
U-Boot mailing list
U-Boot@lists.denx.de
http://lists.denx.de/mailman/listinfo/u-boot
