From c9f89c3f87cfc026d88c08054710902dd52a7772 Mon Sep 17 00:00:00 2001 From: Shunyong Yang Date: Wed, 21 Mar 2018 12:46:23 -0600 Subject: [PATCH] vfio-mdev/samples: change RDI interrupt condition When FIFO mode is enabled, the receive data available interrupt (UART_IIR_RDI in code) should be triggered when the number of data in FIFO is equal or larger than interrupt trigger level. This patch changes the trigger level check to ensure multiple bytes received from upper layer can trigger RDI interrupt correctly. Cc: Joey Zheng Signed-off-by: Shunyong Yang Reviewed by: Kirti Wankhede Signed-off-by: Alex Williamson --- samples/vfio-mdev/mtty.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/samples/vfio-mdev/mtty.c b/samples/vfio-mdev/mtty.c index 09f255bdf3ac..7abb79d8313d 100644 --- a/samples/vfio-mdev/mtty.c +++ b/samples/vfio-mdev/mtty.c @@ -534,7 +534,7 @@ static void handle_bar_read(unsigned int index, struct mdev_state *mdev_state, /* Interrupt priority 2: Fifo trigger level reached */ if ((ier & UART_IER_RDI) && - (mdev_state->s[index].rxtx.count == + (mdev_state->s[index].rxtx.count >= mdev_state->s[index].intr_trigger_level)) *buf |= UART_IIR_RDI;