linux-kernel - Re: [PATCH v2] I2C: designware: fix IO timeout issue for AMD controller

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Message-ID: <20151212170322.GB1530@katana>
Date:	Sat, 12 Dec 2015 18:03:22 +0100
From:	Wolfram Sang <wsa@...-dreams.de>
To:	Xiangliang Yu <Xiangliang.Yu@....com>
Cc:	andriy.shevchenko@...ux.intel.com, jarkko.nikula@...ux.intel.com,
	mika.westerberg@...ux.intel.com, linux-i2c@...r.kernel.org,
	linux-kernel@...r.kernel.org, SPG_Linux_Kernel@....com
Subject: Re: [PATCH v2] I2C: designware: fix IO timeout issue for AMD
 controller

On Fri, Dec 11, 2015 at 08:02:53PM +0800, Xiangliang Yu wrote:
> Because of some hardware limitation, AMD I2C controller can't
> trigger pending interrupt if interrupt status has been changed
> after clearing interrupt status bits. Then, I2C will lost
> interrupt and IO timeout.
> 
> According to hardware design, this patch implements a workaround
> to disable i2c controller interrupt and re-enable i2c interrupt
> before exiting ISR.
> 
> To reduce the performance impacts on other vendors, use unlikely
> function to check flag in ISR.
> ---

Don't manually add "---". This breaks a lot of workflow scripts.
"Patchwork" missed your Signed-off, for example!

> Changes in v2:
>     - pass flags with ->driver_data
>     - unmask interrupt right after masking

This paragraph...

> 
> Signed-off-by: Xiangliang Yu <Xiangliang.Yu@....com>
> ---

... needs to go here.

However, I fixed it this time and applied to for-current, thanks!


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