diff options
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/xilinx_uartps.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c index e0c6a8619b9f..98f7b590ec55 100644 --- a/drivers/tty/serial/xilinx_uartps.c +++ b/drivers/tty/serial/xilinx_uartps.c @@ -130,8 +130,21 @@ MODULE_PARM_DESC(rx_timeout, "Rx timeout, 1-255"); #define CDNS_UART_IXR_RXEMPTY 0x00000002 /* RX FIFO empty interrupt. */ #define CDNS_UART_IXR_MASK 0x00001FFF /* Valid bit mask */ -#define CDNS_UART_RX_IRQS (CDNS_UART_IXR_PARITY | CDNS_UART_IXR_FRAMING | \ - CDNS_UART_IXR_OVERRUN | CDNS_UART_IXR_RXTRIG | \ + /* + * Do not enable parity error interrupt for the following + * reason: When parity error interrupt is enabled, each Rx + * parity error always results in 2 events. The first one + * being parity error interrupt and the second one with a + * proper Rx interrupt with the incoming data. Disabling + * parity error interrupt ensures better handling of parity + * error events. With this change, for a parity error case, we + * get a Rx interrupt with parity error set in ISR register + * and we still handle parity errors in the desired way. + */ + +#define CDNS_UART_RX_IRQS (CDNS_UART_IXR_FRAMING | \ + CDNS_UART_IXR_OVERRUN | \ + CDNS_UART_IXR_RXTRIG | \ CDNS_UART_IXR_TOUT) /* Goes in read_status_mask for break detection as the HW doesn't do it*/ |