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authorBernhard Seibold <mail@bernhard-seibold.de>2023-06-02 16:30:29 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2023-06-06 15:45:34 +0300
commit306320034e8fbe7ee1cc4f5269c55658b4612048 (patch)
treea588633c657cf6df3820035a0ee1806c35e28f19 /drivers/tty
parent9561de3a55bed6bdd44a12820ba81ec416e705a7 (diff)
downloadlinux-306320034e8fbe7ee1cc4f5269c55658b4612048.tar.xz
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: 2f0fc4159a6a ("SERIAL: Lantiq: Add driver for MIPS Lantiq SOCs.") Cc: <stable@vger.kernel.org> Signed-off-by: Bernhard Seibold <mail@bernhard-seibold.de> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Message-ID: <20230602133029.546-1-mail@bernhard-seibold.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
-rw-r--r--drivers/tty/serial/lantiq.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/tty/serial/lantiq.c b/drivers/tty/serial/lantiq.c
index a58e9277dfad..f1387f1024db 100644
--- a/drivers/tty/serial/lantiq.c
+++ b/drivers/tty/serial/lantiq.c
@@ -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);