From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?UTF-8?Q?Sean_Nyekj=c3=a6r?= Subject: Re: sc16is7xx: a lot of time is spend in sc16is7xx_port_irq Date: Wed, 24 Feb 2016 18:39:46 +0100 Message-ID: <56CDEAE2.9050102@prevas.dk> References: <56CDCCE6.5020801@prevas.dk> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <56CDCCE6.5020801@prevas.dk> Sender: linux-rt-users-owner@vger.kernel.org To: linux-serial@vger.kernel.org Cc: linux-rt-users@vger.kernel.org List-Id: linux-serial@vger.kernel.org CC'ing RT On 2016-02-24 16:31, Sean Nyekj=C3=A6r wrote: > Hi > > I'm using the sc16is750 on an imx6d platform with RT patches applied. > > I have observed that sometimes the driver locks the whole system as i= s=20 > loops inside the sc16is7xx_port_irq. > I have applied some debug and seen we are looping upto 130000 times i= n=20 > the while(1) loop. > The SC16IS7XX_IIR_REG does signal the SC16IS7XX_IIR_XOFFI_SRC but the= =20 > SC16IS7XX_IER_XOFFI_BIT is not set. > > Please ask for more debug info if needed :-) > > Br > Sean -- To unsubscribe from this list: send the line "unsubscribe linux-rt-user= s" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?UTF-8?Q?Sean_Nyekj=c3=a6r?= Subject: Re: sc16is7xx: a lot of time is spend in sc16is7xx_port_irq Date: Wed, 24 Feb 2016 18:39:46 +0100 Message-ID: <56CDEAE2.9050102@prevas.dk> References: <56CDCCE6.5020801@prevas.dk> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: To: Return-path: Received: from mail02.prevas.se ([62.95.78.10]:34659 "EHLO mail02.prevas.se" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932208AbcBXRju (ORCPT ); Wed, 24 Feb 2016 12:39:50 -0500 In-Reply-To: <56CDCCE6.5020801@prevas.dk> Sender: linux-rt-users-owner@vger.kernel.org List-ID: CC'ing RT On 2016-02-24 16:31, Sean Nyekj=C3=A6r wrote: > Hi > > I'm using the sc16is750 on an imx6d platform with RT patches applied. > > I have observed that sometimes the driver locks the whole system as i= s=20 > loops inside the sc16is7xx_port_irq. > I have applied some debug and seen we are looping upto 130000 times i= n=20 > the while(1) loop. > The SC16IS7XX_IIR_REG does signal the SC16IS7XX_IIR_XOFFI_SRC but the= =20 > SC16IS7XX_IER_XOFFI_BIT is not set. > > Please ask for more debug info if needed :-) > > Br > Sean -- To unsubscribe from this list: send the line "unsubscribe linux-rt-user= s" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html