From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alex Williamson Subject: Re: [PATCH] vfio-mdev/samples: change RDI interrupt condition Date: Thu, 22 Mar 2018 15:48:10 -0600 Message-ID: <20180322154810.169b10af@w520.home> References: <1520492887-8021-1-git-send-email-shunyong.yang@hxt-semitech.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: Shunyong Yang , , , Joey Zheng To: Kirti Wankhede Return-path: In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.vger.kernel.org On Fri, 9 Mar 2018 11:36:05 +0530 Kirti Wankhede wrote: > Thanks for fixing it. > Patch looks good to me. > +Alex to pull this patch. > > Reviewed by: Kirti Wankhede Applied to vfio next branch for v4.17 with Kirti's Rb. Thanks, Alex > On 3/8/2018 12:38 PM, Shunyong Yang wrote: > > 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 > > --- > > 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; > > > >