soc: soc_ti_k3: fix revision array bounds checks

If rev is equal to the array size, we'll access the array
one-past-the-end.

Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Reviewed-by: Bryan Brattlof <bb@ti.com>

diff --git a/drivers/soc/soc_ti_k3.c b/drivers/soc/soc_ti_k3.c
index 42430d7..b720131 100644 (file)
--- a/drivers/soc/soc_ti_k3.c
+++ b/drivers/soc/soc_ti_k3.c
@@ -70,12 +70,12 @@ static const char *get_rev_string(u32 idreg)
 
        switch (soc) {
        case JTAG_ID_PARTNO_J721E:
-               if (rev > ARRAY_SIZE(j721e_rev_string_map))
+               if (rev >= ARRAY_SIZE(j721e_rev_string_map))
                        goto bail;
                return j721e_rev_string_map[rev];
 
        default:
-               if (rev > ARRAY_SIZE(typical_rev_string_map))
+               if (rev >= ARRAY_SIZE(typical_rev_string_map))
                        goto bail;
                return typical_rev_string_map[rev];
        };