[PATCH v1] cmd: hash: fix param count check

[Igor Opaniuk]

From: Igor Opaniuk <igor.opan...@gmail.com>

Add correct check for parameter count.

This fixes this issue when `hash` cmd is invoked without params:

=> hash
data abort
pc : [<bf739204>]          lr : [<ba6effa8>]
reloc pc : [<60019204>]    lr : [<5afcffa8>]
sp : ba6dd9c8  ip : bf7391f0     fp : bf74ec14
r10: 00000001  r9 : ba6dfea0     r8 : bf7ea030
r7 : 00000000  r6 : ba6effa8     r5 : 00000000  r4 : ffffffff
r3 : bf7c257c  r2 : 00000001     r1 : 00000000  r0 : bf7e6e34
Flags: nZCv  IRQs off  FIQs on  Mode SVC_32
Code: e5934004 e1a0e003 e59f3050 e2444001 (e5f4c001)
Resetting CPU ...

resetting ...

Signed-off-by: Igor Opaniuk <igor.opan...@gmail.com>
---

 cmd/hash.c | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

diff --git a/cmd/hash.c b/cmd/hash.c
index e163cd67742..5534a735fa7 100644
--- a/cmd/hash.c
+++ b/cmd/hash.c
@@ -14,15 +14,22 @@
 #include <hash.h>
 #include <linux/ctype.h>
 
+#if IS_ENABLED(CONFIG_HASH_VERIFY)
+#define HARGS 6
+#else
+#define HARGS 5
+#endif
+
 static int do_hash(struct cmd_tbl *cmdtp, int flag, int argc,
                   char *const argv[])
 {
        char *s;
        int flags = HASH_FLAG_ENV;
 
-#ifdef CONFIG_HASH_VERIFY
-       if (argc < 4)
+       if (argc < (HARGS - 1))
                return CMD_RET_USAGE;
+
+#if IS_ENABLED(CONFIG_HASH_VERIFY)
        if (!strcmp(argv[1], "-v")) {
                flags |= HASH_FLAG_VERIFY;
                argc--;
@@ -37,18 +44,12 @@ static int do_hash(struct cmd_tbl *cmdtp, int flag, int 
argc,
        return hash_command(*argv, flags, cmdtp, flag, argc - 1, argv + 1);
 }
 
-#ifdef CONFIG_HASH_VERIFY
-#define HARGS 6
-#else
-#define HARGS 5
-#endif
-
 U_BOOT_CMD(
        hash,   HARGS,  1,      do_hash,
        "compute hash message digest",
        "algorithm address count [[*]hash_dest]\n"
                "    - compute message digest [save to env var / *address]"
-#ifdef CONFIG_HASH_VERIFY
+#if IS_ENABLED(CONFIG_HASH_VERIFY)
        "\nhash -v algorithm address count [*]hash\n"
                "    - verify message digest of memory area to immediate value, 
\n"
                "      env var or *address"
-- 
2.34.1