thunderbolt: Wait a bit longer for ICM to authenticate the active NVM

Sometimes during cold boot ICM has not yet authenticated the active NVM
image leading to timeout and failing the driver probe. Allow ICM to take
some more time and increase the timeout to 3 seconds before we give up.

While there fix icm_firmware_init() to return the real error code
without overwriting it with -ENODEV.

Fixes: f67cf491 ("thunderbolt: Add support for Internal Connection Manager (ICM)")
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: stable@vger.kernel.org

drivers/thunderbolt/icm.c

@@ -736,14 +736,14 @@ static bool icm_ar_is_supported(struct tb *tb)
 static int icm_ar_get_mode(struct tb *tb)
 {
 	struct tb_nhi *nhi = tb->nhi;
-	int retries = 5;
+	int retries = 60;
 	u32 val;
 
 	do {
 		val = ioread32(nhi->iobase + REG_FW_STS);
 		if (val & REG_FW_STS_NVM_AUTH_DONE)
 			break;
-		msleep(30);
+		msleep(50);
 	} while (--retries);
 
 	if (!retries) {
@@ -1063,6 +1063,9 @@ static int icm_firmware_init(struct tb *tb)
 			break;
 
 		default:
+			if (ret < 0)
+				return ret;
+
 			tb_err(tb, "ICM firmware is in wrong mode: %u\n", ret);
 			return -ENODEV;
 		}