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Commit 468b4fb5 authored by Nava kishore Manne's avatar Nava kishore Manne Committed by Greg Kroah-Hartman
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serial: uartps: Fix interrupt mask issue to handle the RX interrupts properly 



commit 260683137ab5276113fc322fdbbc578024185fee upstream.

This patch Correct the RX interrupt mask value to handle the
RX interrupts properly.

Fixes: c8dbdc84 ("serial: xuartps: Rewrite the interrupt handling logic")
Signed-off-by: default avatarNava kishore Manne <nava.manne@xilinx.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: default avatarMichal Simek <michal.simek@xilinx.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 362e8cbc

drivers/tty/serial/xilinx_uartps.c

+2 −2
Original line number Diff line number Diff line
@@ -128,7 +128,7 @@ MODULE_PARM_DESC(rx_timeout, "Rx timeout, 1-255"); 
#define CDNS_UART_IXR_RXTRIG	0x00000001 /* RX FIFO trigger interrupt */

#define CDNS_UART_IXR_RXFULL	0x00000004 /* RX FIFO full interrupt. */

#define CDNS_UART_IXR_RXEMPTY	0x00000002 /* RX FIFO empty interrupt. */

#define CDNS_UART_IXR_MASK	0x00001FFF /* Valid bit mask */

#define CDNS_UART_IXR_RXMASK	0x000021e7 /* Valid RX bit mask */



	/*

	 * Do not enable parity error interrupt for the following
@@ -362,7 +362,7 @@ static irqreturn_t cdns_uart_isr(int irq, void *dev_id) 
		cdns_uart_handle_tx(dev_id);

		isrstatus &= ~CDNS_UART_IXR_TXEMPTY;

	}

	if (isrstatus & CDNS_UART_IXR_MASK)

	if (isrstatus & CDNS_UART_IXR_RXMASK)

		cdns_uart_handle_rx(dev_id, isrstatus);



	spin_unlock(&port->lock);