From: Wolfram Sang <wsa@the-dreams.de>
To: Shikai Wang <sxauwsk@163.com>
Cc: Michal Simek <michal.simek@xilinx.com>,
Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>,
linux-arm-kernel@lists.infradead.org, linux-i2c@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] i2c: cadence: try reset when master receive arbitration lost
Date: Sat, 23 Feb 2019 10:48:43 +0100 [thread overview]
Message-ID: <20190223094842.GF1018@kunai> (raw)
In-Reply-To: <20190219012447.5900-1-sxauwsk@163.com>
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On Tue, Feb 19, 2019 at 09:24:47AM +0800, Shikai Wang wrote:
> When the adapter receive arbitration lost error interrupts,
> cdns_i2c_master_xfer return to the caller directly instead of resetting
> the adapter which resulted in the adapter being out of control.
>
> So when driver detect err_status such as arbitration lost,
> then try to repair and fix it.
Just checking because resetting looks like a big hammer to me: there is
no way to gracefully recover form 'arbitration lost' interrupt?
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WARNING: multiple messages have this Message-ID (diff)
From: Wolfram Sang <wsa@the-dreams.de>
To: Shikai Wang <sxauwsk@163.com>
Cc: linux-kernel@vger.kernel.org,
Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>,
Michal Simek <michal.simek@xilinx.com>,
linux-arm-kernel@lists.infradead.org, linux-i2c@vger.kernel.org
Subject: Re: [PATCH v2] i2c: cadence: try reset when master receive arbitration lost
Date: Sat, 23 Feb 2019 10:48:43 +0100 [thread overview]
Message-ID: <20190223094842.GF1018@kunai> (raw)
In-Reply-To: <20190219012447.5900-1-sxauwsk@163.com>
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On Tue, Feb 19, 2019 at 09:24:47AM +0800, Shikai Wang wrote:
> When the adapter receive arbitration lost error interrupts,
> cdns_i2c_master_xfer return to the caller directly instead of resetting
> the adapter which resulted in the adapter being out of control.
>
> So when driver detect err_status such as arbitration lost,
> then try to repair and fix it.
Just checking because resetting looks like a big hammer to me: there is
no way to gracefully recover form 'arbitration lost' interrupt?
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next prev parent reply other threads:[~2019-02-23 9:48 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-19 1:24 [PATCH v2] i2c: cadence: try reset when master receive arbitration lost Shikai Wang
2019-02-19 1:24 ` Shikai Wang
2019-02-19 1:24 ` Shikai Wang
2019-02-23 9:48 ` Wolfram Sang [this message]
2019-02-23 9:48 ` Wolfram Sang
2019-03-09 9:44 ` Wolfram Sang
2019-03-09 9:44 ` Wolfram Sang
2019-03-09 9:49 ` Wolfram Sang
2019-03-09 9:49 ` Wolfram Sang
2019-11-05 7:42 ` Shubhrajyoti Datta
2019-11-05 7:42 ` Shubhrajyoti Datta
2019-11-05 8:47 ` sxauwsk
2019-11-05 8:47 ` sxauwsk
2019-11-07 6:13 ` Shubhrajyoti Datta
2019-11-07 6:13 ` Shubhrajyoti Datta
2019-11-08 12:25 ` sxauwsk
2019-11-08 12:25 ` sxauwsk
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