kernel_5.10 no rt

hc

2023-12-11 6778948f9de86c3cfaf36725a7c87dcff9ba247f

 kernel/drivers/tty/serial/8250/8250_core.c
..
..
@@ -275,8 +275,10 @@
275
275
 	 * Must disable interrupts or else we risk racing with the interrupt
276
276
 	 * based handler.
277
277
 	 */
278
-	if (up->port.irq)
279
-		ier = serial8250_clear_IER(up);
278
+	if (up->port.irq) {
279
+		ier = serial_in(up, UART_IER);
280
+		serial_out(up, UART_IER, 0);
281
+	}
280
282
 
281
283
 	iir = serial_in(up, UART_IIR);
282
284
 
..
..
@@ -299,7 +301,7 @@
299
301
 		serial8250_tx_chars(up);
300
302
 
301
303
 	if (up->port.irq)
302
-		serial8250_set_IER(up, ier);
304
+		serial_out(up, UART_IER, ier);
303
305
 
304
306
 	spin_unlock_irqrestore(&up->port.lock, flags);
305
307
 
..
..
@@ -582,14 +584,6 @@
582
584
 
583
585
 #ifdef CONFIG_SERIAL_8250_CONSOLE
584
586
 
585
-static void univ8250_console_write_atomic(struct console *co, const char *s,
586
-					  unsigned int count)
587
-{
588
-	struct uart_8250_port *up = &serial8250_ports[co->index];
589
-
590
-	serial8250_console_write_atomic(up, s, count);
591
-}
592
-
593
587
 static void univ8250_console_write(struct console *co, const char *s,
594
588
 				   unsigned int count)
595
589
 {
..
..
@@ -683,7 +677,6 @@
683
677
 
684
678
 static struct console univ8250_console = {
685
679
 	.name		= "ttyS",
686
-	.write_atomic	= univ8250_console_write_atomic,
687
680
 	.write		= univ8250_console_write,
688
681
 	.device		= uart_console_device,
689
682
 	.setup		= univ8250_console_setup,