From mboxrd@z Thu Jan 1 00:00:00 1970 From: soren.brinkmann@xilinx.com (Soren Brinkmann) Date: Thu, 19 Nov 2015 12:02:18 -0800 Subject: [PATH RESEND v2 04/10] tty: xuartps: Clear interrupt status register in shutdown In-Reply-To: <1447963344-16266-1-git-send-email-soren.brinkmann@xilinx.com> References: <1447963344-16266-1-git-send-email-soren.brinkmann@xilinx.com> Message-ID: <1447963344-16266-5-git-send-email-soren.brinkmann@xilinx.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org When shutting down the UART, clear the interrupt status register. Signed-off-by: Soren Brinkmann --- 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 df6778d17949..b7fc30639292 100644 --- a/drivers/tty/serial/xilinx_uartps.c +++ b/drivers/tty/serial/xilinx_uartps.c @@ -825,6 +825,7 @@ 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, -- 2.6.3.3.g9bb996a