From aea8f3ddcf5de21188b737345fc2f62526350874 Mon Sep 17 00:00:00 2001 From: Soren Brinkmann Date: Sat, 26 Dec 2015 02:43:52 -0800 Subject: [PATCH] tty: xuartps: Clear interrupt status register in shutdown When shutting down the UART, clear the interrupt status register. Bits in the ISR are cleared by writing them as '1'. Signed-off-by: Soren Brinkmann Reviewed-by: Peter Hurley Reviewed-by: Moritz Fischer Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/xilinx_uartps.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c index 6a7cd4e057ae..ef114d7a0623 100644 --- a/drivers/tty/serial/xilinx_uartps.c +++ b/drivers/tty/serial/xilinx_uartps.c @@ -828,6 +828,7 @@ static void cdns_uart_shutdown(struct uart_port *port) /* Disable interrupts */ status = readl(port->membase + CDNS_UART_IMR_OFFSET); writel(status, port->membase + CDNS_UART_IDR_OFFSET); + writel(0xffffffff, port->membase + CDNS_UART_ISR_OFFSET); /* Disable the TX and RX */ writel(CDNS_UART_CR_TX_DIS | CDNS_UART_CR_RX_DIS, -- 2.39.5