common: mii: Do not allow to exceed max phy limit

Phy can have addresses 0-31. Check this boundary to ensure that user
can't call commands on phy address 32 and more.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Tom Rini <trini@konsulko.com>

diff --git a/common/cmd_mii.c b/common/cmd_mii.c
index 5e9079da048784c1b01897c9e42f2e14a1a73232..7ef7532a502a01c955339f28269dc3fcee342c59 100644 (file)
--- a/common/cmd_mii.c
+++ b/common/cmd_mii.c
@@ -314,6 +314,11 @@ static int do_mii(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
                        mask = simple_strtoul(argv[5], NULL, 16);
        }
 
+       if (addrhi > 31) {
+               printf("Incorrect PHY address. Range should be 0-31\n");
+               return CMD_RET_USAGE;
+       }
+
        /* use current device */
        devname = miiphy_get_current_dev();