sdcard: warn if host uses an incorrect address for APP CMD (CMD55)

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Alistair Francis <alistair.francis@xilinx.com>
Message-id: 20180215221325.7611-15-f4bug@amsat.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

hw/sd/sd.c

@@ -1391,6 +1391,11 @@ static sd_rsp_type_t sd_normal_command(SDState *sd,
         case sd_identification_state:
         case sd_inactive_state:
             return sd_illegal;
+        case sd_idle_state:
+            if (rca) {
+                qemu_log_mask(LOG_GUEST_ERROR,
+                              "SD: illegal RCA 0x%04x for APP_CMD\n", req.cmd);
+            }
         default:
             break;
         }