From: Soren Brinkmann Date: Sat, 26 Dec 2015 10:43:52 +0000 (-0800) Subject: tty: xuartps: Clear interrupt status register in shutdown X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=aea8f3ddcf5de21188b737345fc2f62526350874;p=linux-beck.git 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 --- 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,