Commit 30632003 authored by Bernhard Seibold's avatar Bernhard Seibold Committed by Greg Kroah-Hartman
Browse files

serial: lantiq: add missing interrupt ack 



Currently, the error interrupt is never acknowledged, so once active it
will stay active indefinitely, causing the handler to be called in an
infinite loop.

Fixes: 2f0fc415 ("SERIAL: Lantiq: Add driver for MIPS Lantiq SOCs.")
Cc: <stable@vger.kernel.org>
Signed-off-by: default avatarBernhard Seibold <mail@bernhard-seibold.de>
Reviewed-by: default avatarIlpo Järvinen <ilpo.jarvinen@linux.intel.com>
Message-ID: <20230602133029.546-1-mail@bernhard-seibold.de>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 9561de3a

drivers/tty/serial/lantiq.c

+1 −0
Original line number Diff line number Diff line
@@ -250,6 +250,7 @@ lqasc_err_int(int irq, void *_port) 
	struct ltq_uart_port *ltq_port = to_ltq_uart_port(port);



	spin_lock_irqsave(&ltq_port->lock, flags);

	__raw_writel(ASC_IRNCR_EIR, port->membase + LTQ_ASC_IRNCR);

	/* clear any pending interrupts */

	asc_update_bits(0, ASCWHBSTATE_CLRPE | ASCWHBSTATE_CLRFE |

		ASCWHBSTATE_CLRROE, port->membase + LTQ_ASC_WHBSTATE);