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serial: uartps: Fix interrupt mask issue to handle the RX interrupts properly 

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

Fixes: c8dbdc842d ("serial: xuartps: Rewrite the interrupt handling logic")
Signed-off-by: Nava kishore Manne <nava.manne@xilinx.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Nava kishore Manne 2018-12-18 13:18:42 +01:00 committed by Greg Kroah-Hartman
parent 32cf21ac4e
commit 260683137a
1 changed files with 2 additions and 2 deletions
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4
drivers/tty/serial/xilinx_uartps.c
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@ -123,7 +123,7 @@ MODULE_PARM_DESC(rx_timeout, "Rx timeout, 1-255");
#define CDNS_UART_IXR_RXTRIG 0x00000001 /* RX FIFO trigger interrupt */ #define CDNS_UART_IXR_RXTRIG 0x00000001 /* RX FIFO trigger interrupt */
#define CDNS_UART_IXR_RXFULL 0x00000004 /* RX FIFO full 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_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 * Do not enable parity error interrupt for the following
@ -364,7 +364,7 @@ static irqreturn_t cdns_uart_isr(int irq, void *dev_id)
cdns_uart_handle_tx(dev_id); cdns_uart_handle_tx(dev_id);
isrstatus &= ~CDNS_UART_IXR_TXEMPTY; isrstatus &= ~CDNS_UART_IXR_TXEMPTY;
} }
if (isrstatus & CDNS_UART_IXR_MASK) if (isrstatus & CDNS_UART_IXR_RXMASK)
cdns_uart_handle_rx(dev_id, isrstatus); cdns_uart_handle_rx(dev_id, isrstatus);
spin_unlock(&port->lock); spin_unlock(&port->lock);