linux-kernel - Re: [PATCH] i2c: tegra: check the clk_prepare

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Message-ID: <51437761.6020901@wwwdotorg.org>
Date:	Fri, 15 Mar 2013 13:32:49 -0600
From:	Stephen Warren <swarren@...dotorg.org>
To:	Laxman Dewangan <ldewangan@...dia.com>
CC:	wsa@...-dreams.de, khali@...ux-fr.org, linux-i2c@...r.kernel.org,
	linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] i2c: tegra: check the clk_prepare_enable() return value

On 03/15/2013 09:34 AM, Laxman Dewangan wrote:
> NVIDIA's Tegra SoC allows read/write of controller register only
> if controller clock is enabled. System hangs if read/write happens
> to registers without enabling clock.
> 
> clk_prepare_enable() can be fail due to unknown reason and hence
> adding check for return value of this function. If this function
> success then only access register otherwise return to caller with
> error.

Wolfram,

Reviewed-by: Stephen Warren <swarren@...dia.com>

This is probably suitable for Cc: stable.
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