--- zzzz-none-000/linux-4.9.279/drivers/tty/serial/8250/8250_port.c	2021-08-08 06:38:54.000000000 +0000
+++ puma7-atom-6591-750/linux-4.9.279/drivers/tty/serial/8250/8250_port.c	2023-02-08 11:43:42.000000000 +0000
@@ -2014,8 +2014,12 @@
 
 		if ((status & bits) == bits)
 			break;
-		if (--tmout == 0)
+		if (--tmout == 0) {
+			dev_err(up->port.dev,
+					"timeout waiting for LSR bits %x\n",
+					bits);
 			break;
+		}
 		udelay(1);
 		touch_nmi_watchdog();
 	}