cmd: fix return code of 'sf write' and 'sf read'

If the offset or the size passed to the 'sf write' or 'sf read' command
exceeds the size of the SPI flash displaying the command usage is not
helpful. Return CMD_RET_FAILURE instead of CMD_RET_USAGE.

Use the CMD_RET_* constants instead of 0, 1, -1.

Simplify a logical expression in the final return statement.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>

diff --git a/cmd/sf.c b/cmd/sf.c
index cf92ac4..272521b 100644 (file)
--- a/cmd/sf.c
+++ b/cmd/sf.c
@@ -281,33 +281,33 @@ static int do_spi_flash_read_write(int argc, char *const argv[])
        loff_t offset, len, maxsize;
 
        if (argc < 3)
-               return -1;
+               return CMD_RET_USAGE;
 
        addr = hextoul(argv[1], &endp);
        if (*argv[1] == 0 || *endp != 0)
-               return -1;
+               return CMD_RET_USAGE;
 
        if (mtd_arg_off_size(argc - 2, &argv[2], &dev, &offset, &len,
                             &maxsize, MTD_DEV_TYPE_NOR, flash->size))
-               return -1;
+               return CMD_RET_FAILURE;
 
        /* Consistency checking */
        if (offset + len > flash->size) {
                printf("ERROR: attempting %s past flash size (%#x)\n",
                       argv[0], flash->size);
-               return 1;
+               return CMD_RET_FAILURE;
        }
 
        if (strncmp(argv[0], "read", 4) != 0 && flash->flash_is_unlocked &&
            !flash->flash_is_unlocked(flash, offset, len)) {
                printf("ERROR: flash area is locked\n");
-               return 1;
+               return CMD_RET_FAILURE;
        }
 
        buf = map_physmem(addr, len, MAP_WRBACK);
        if (!buf && addr) {
                puts("Failed to map physical memory\n");
-               return 1;
+               return CMD_RET_FAILURE;
        }
 
        if (strcmp(argv[0], "update") == 0) {
@@ -332,7 +332,7 @@ static int do_spi_flash_read_write(int argc, char *const argv[])
 
        unmap_physmem(buf, len);
 
-       return ret == 0 ? 0 : 1;
+       return ret ? CMD_RET_FAILURE : CMD_RET_SUCCESS;
 }
 
 static int do_spi_flash_erase(int argc, char *const argv[])