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

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Date:	Fri, 22 Mar 2013 10:31:14 +0100
From:	Wolfram Sang <wsa@...-dreams.de>
To:	Laxman Dewangan <ldewangan@...dia.com>
Cc:	swarren@...dotorg.org, 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 Fri, Mar 15, 2013 at 09:04:08PM +0530, 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.
> 
> Signed-off-by: Laxman Dewangan <ldewangan@...dia.com>

Applied to for-current, thanks!
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