For sf commands, when '0' length is passed for erase, update, write or read, there might be undesired results. Ideally '0' length means nothing to do.
So print 'ERROR: Invalid size 0' and return cmd failure when length '0' is passed to sf commands. Same thing applies for nand commands also. Example: ZynqMP> sf erase 0 0 ERROR: Invalid size 0 ZynqMP> sf write 10000 0 0 ERROR: Invalid size 0 ZynqMP> sf read 10000 0 0 ERROR: Invalid size 0 ZynqMP> sf update 1000 10000 0 ERROR: Invalid size 0 ZynqMP> Signed-off-by: Ashok Reddy Soma <[email protected]> --- Changes in v3: - Change printf to debug as it is too verbose Changes in v2: - Changed print from 'size is 0' to Invalid size 0 without quites. - Modified description to be imperative - Fixed typo in description from "samething" to "same thing" cmd/legacy-mtd-utils.c | 5 +++++ cmd/sf.c | 5 +++++ 2 files changed, 10 insertions(+) diff --git a/cmd/legacy-mtd-utils.c b/cmd/legacy-mtd-utils.c index ac7139f84d..5903a90fe5 100644 --- a/cmd/legacy-mtd-utils.c +++ b/cmd/legacy-mtd-utils.c @@ -88,6 +88,11 @@ int mtd_arg_off_size(int argc, char *const argv[], int *idx, loff_t *off, return -1; } + if (*size == 0) { + debug("ERROR: Invalid size 0\n"); + return -1; + } + print: printf("device %d ", *idx); if (*size == chipsize) diff --git a/cmd/sf.c b/cmd/sf.c index 11b9c25896..55bef2f769 100644 --- a/cmd/sf.c +++ b/cmd/sf.c @@ -353,6 +353,11 @@ static int do_spi_flash_erase(int argc, char *const argv[]) if (ret != 1) return CMD_RET_USAGE; + if (size == 0) { + debug("ERROR: Invalid size 0\n"); + return CMD_RET_FAILURE; + } + /* Consistency checking */ if (offset + size > flash->size) { printf("ERROR: attempting %s past flash size (%#x)\n", -- 2.17.1
