From 9fd383724cf49b5fd787c62169569d870857d611 Mon Sep 17 00:00:00 2001 From: Stephen Warren Date: Mon, 1 Apr 2013 11:50:28 +0000 Subject: mmc: don't allow extra cmdline arguments 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 --- common/cmd_mmc.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) (limited to 'common') diff --git a/common/cmd_mmc.c b/common/cmd_mmc.c index 8c53a10315..9f3d6c575b 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) { -- cgit v1.2.1