4.9-stable review patch. If anyone has any objections, please let me know.
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From: Nava kishore Manne nava.manne@xilinx.com
commit 260683137ab5276113fc322fdbbc578024185fee upstream.
This patch Correct the RX interrupt mask value to handle the RX interrupts properly.
Fixes: c8dbdc842d30 ("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
--- drivers/tty/serial/xilinx_uartps.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/tty/serial/xilinx_uartps.c +++ b/drivers/tty/serial/xilinx_uartps.c @@ -128,7 +128,7 @@ MODULE_PARM_DESC(rx_timeout, "Rx timeout #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 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);