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From: Soren Brinkmann <soren.brinkmann@xilinx.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Jiri Slaby <jslaby@suse.com>
Cc: Michal Simek <michal.simek@xilinx.com>,
	<linux-serial@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-kernel@vger.kernel.org>,
	Soren Brinkmann <soren.brinkmann@xilinx.com>
Subject: [PATCH v2 04/10] tty: xuartps: Clear interrupt status register in shutdown
Date: Wed, 4 Nov 2015 23:21:13 -0800	[thread overview]
Message-ID: <1446708079-1105-5-git-send-email-soren.brinkmann@xilinx.com> (raw)
In-Reply-To: <1446708079-1105-1-git-send-email-soren.brinkmann@xilinx.com>

When shutting down the UART, clear the interrupt status register.

Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
---
 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,
-- 
2.6.2.3.ga463a5b


  parent reply	other threads:[~2015-11-05  7:22 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-11-05  7:21 [PATCH v2 00/10] tty: xuartps: Fix lock ups Soren Brinkmann
2015-11-05  7:21 ` [PATCH v2 01/10] tty: xuartps: Beautify read-modify writes Soren Brinkmann
2015-11-05  7:21 ` [PATCH v2 02/10] tty: xuartps: Use spinlock to serialize HW access Soren Brinkmann
2015-11-05  7:21 ` [PATCH v2 03/10] tty: xuartps: Always enable transmitter in start_tx Soren Brinkmann
2015-11-05  7:21 ` Soren Brinkmann [this message]
2015-11-05  7:21 ` [PATCH v2 05/10] tty: xuartps: Improve startup function Soren Brinkmann
2015-11-05  7:21 ` [PATCH v2 06/10] tty: xuartps: Keep lock for whole ISR Soren Brinkmann
2015-11-05  7:21 ` [PATCH v2 07/10] tty: xuartps: Acquire port lock for shutdown Soren Brinkmann
2015-11-05  7:21 ` [PATCH v2 08/10] tty: xuartps: Move RX path into helper function Soren Brinkmann
2015-11-05  7:21 ` [PATCH v2 09/10] tty: xuartps: Only handle RX IRQs when RX is enabled Soren Brinkmann
2015-11-05  7:21 ` [PATCH v2 10/10] tty: xuartps: Cleanup: Reformat if-else Soren Brinkmann

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