linux-kernel - Re: [PATCH] i2c: designware: prevent signals from aborting I2C transfers

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Date:	Tue, 11 Jun 2013 20:35:03 +0200
From:	Wolfram Sang <wsa@...-dreams.de>
To:	Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc:	linux-kernel@...r.kernel.org, Jean Delvare <khali@...ux-fr.org>,
	linux-i2c@...r.kernel.org
Subject: Re: [PATCH] i2c: designware: prevent signals from aborting I2C
 transfers

On Wed, May 22, 2013 at 01:03:11PM +0300, Mika Westerberg wrote:
> If a process receives signal while it is waiting for I2C transfer to
> complete, an error is returned to the caller and the transfer is aborted.
> This can cause the driver to fail subsequent transfers. Also according to
> commit d295a86eab2 (i2c: mv64xxx: work around signals causing I2C
> transactions to be aborted) I2C drivers aren't supposed to abort
> transactions on signals.
> 
> To prevent this switch to use wait_for_completion_timeout() instead of
> wait_for_completion_interruptible_timeout() in the designware I2C driver.
> 
> Signed-off-by: Mika Westerberg <mika.westerberg@...ux.intel.com>

Applied to for-next, thanks!


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