From: "Sean Nyekjær" <sean.nyekjaer@prevas.dk>
To: linux-serial@vger.kernel.org
Cc: linux-rt-users@vger.kernel.org
Subject: Re: sc16is7xx: a lot of time is spend in sc16is7xx_port_irq
Date: Wed, 24 Feb 2016 18:39:46 +0100 [thread overview]
Message-ID: <56CDEAE2.9050102@prevas.dk> (raw)
In-Reply-To: <56CDCCE6.5020801@prevas.dk>
CC'ing RT
On 2016-02-24 16:31, Sean Nyekjær 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 is
> loops inside the sc16is7xx_port_irq.
> I have applied some debug and seen we are looping upto 130000 times in
> the while(1) loop.
> The SC16IS7XX_IIR_REG does signal the SC16IS7XX_IIR_XOFFI_SRC but the
> SC16IS7XX_IER_XOFFI_BIT is not set.
>
> Please ask for more debug info if needed :-)
>
> Br
> Sean
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WARNING: multiple messages have this Message-ID (diff)
From: "Sean Nyekjær" <sean.nyekjaer@prevas.dk>
To: <linux-serial@vger.kernel.org>
Cc: <linux-rt-users@vger.kernel.org>
Subject: Re: sc16is7xx: a lot of time is spend in sc16is7xx_port_irq
Date: Wed, 24 Feb 2016 18:39:46 +0100 [thread overview]
Message-ID: <56CDEAE2.9050102@prevas.dk> (raw)
In-Reply-To: <56CDCCE6.5020801@prevas.dk>
CC'ing RT
On 2016-02-24 16:31, Sean Nyekjær 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 is
> loops inside the sc16is7xx_port_irq.
> I have applied some debug and seen we are looping upto 130000 times in
> the while(1) loop.
> The SC16IS7XX_IIR_REG does signal the SC16IS7XX_IIR_XOFFI_SRC but the
> 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-users" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
next parent reply other threads:[~2016-02-24 17:39 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <56CDCCE6.5020801@prevas.dk>
2016-02-24 17:39 ` Sean Nyekjær [this message]
2016-02-24 17:39 ` sc16is7xx: a lot of time is spend in sc16is7xx_port_irq Sean Nyekjær
2016-02-24 22:35 ` Josh Cartwright
2016-02-26 11:43 ` Sebastian Andrzej Siewior
2016-02-26 11:48 ` [PATCH] tty: serial: sc16is7xx: use threaded interrupts instead of homegrow Sebastian Andrzej Siewior
2016-02-26 14:34 ` Kuba Kicinski
2016-02-26 16:52 ` Josh Cartwright
2016-02-26 18:26 ` Kuba Kicinski
2016-02-26 19:00 ` Josh Cartwright
2016-03-07 16:41 ` Sebastian Andrzej Siewior
2016-03-07 16:58 ` Josh Cartwright
2016-03-07 17:22 ` Sean Nyekjær
2016-03-08 21:18 ` Jakub Kicinski
2016-03-09 7:03 ` Sean Nyekjær
2016-03-09 7:03 ` Sean Nyekjær
2016-03-09 11:13 ` Jakub Kicinski
2016-03-09 11:13 ` Jakub Kicinski
2016-03-09 12:04 ` Sebastian Andrzej Siewior
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