[PATCH 4/9] tty: xuartps: Clear interrupt status register in shutdown
From: Soren Brinkmann <hidden>
Date: 2015-11-04 00:21:37
Also in:
linux-serial, lkml
Subsystem:
the rest, tty layer and serial drivers · Maintainers:
Linus Torvalds, Greg Kroah-Hartman, Jiri Slaby
When shutting down the UART, clear the interrupt status register. Signed-off-by: Soren Brinkmann <redacted> --- 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 5edd1efca015..738df6bb2646 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,
--
2.6.2.3.ga463a5b