Building with gcc-5.2 raises this warning:

drivers/misc/cros_ec_sandbox.c: In function cros_ec_sandbox_packet:
drivers/misc/cros_ec_sandbox.c:483:5: warning: len may be used uninitialized in 
this function [-Wmaybe-uninitialized]
  if (len < 0)
     ^

If the function process_cmd() is called with
req_hdr->command == EC_CMD_ENTERING_MODE, the value of len will be
returned uninitialized.

Signed-off-by: Daniel Schwierzeck <daniel.schwierz...@gmail.com>

---

 drivers/misc/cros_ec_sandbox.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/misc/cros_ec_sandbox.c b/drivers/misc/cros_ec_sandbox.c
index 7509612..98f19a6 100644
--- a/drivers/misc/cros_ec_sandbox.c
+++ b/drivers/misc/cros_ec_sandbox.c
@@ -460,6 +460,7 @@ static int process_cmd(struct ec_state *ec,
                len = cros_ec_keyscan(ec, resp_data);
                break;
        case EC_CMD_ENTERING_MODE:
+               len = 0;
                break;
        default:
                printf("   ** Unknown EC command %#02x\n", req_hdr->command);
-- 
2.5.0

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