linux-kernel - Re: [PATCH 1/1] mmc: pwrseq: Fix error code propagation in mmc_pwrseq_simple

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Date:	Tue, 14 Apr 2015 11:00:32 +0900
From:	Alexandre Courbot <acourbot@...dia.com>
To:	Javier Martinez Canillas <javier.martinez@...labora.co.uk>,
	Ulf Hansson <ulf.hansson@...aro.org>
CC:	Marek Szyprowski <m.szyprowski@...sung.com>,
	Olof Johansson <olof@...om.net>,
	Doug Anderson <dianders@...omium.org>,
	Kevin Hilman <khilman@...aro.org>, <linux-mmc@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <linux-samsung-soc@...r.kernel.org>
Subject: Re: [PATCH 1/1] mmc: pwrseq: Fix error code propagation in mmc_pwrseq_simple_alloc()

On 04/13/2015 11:07 PM, Javier Martinez Canillas wrote:
> If the struct mmc_pwrseq_match .alloc function used to allocate a
> struct mmc_pwrseq fails, the error is propagated to mmc_of_parse().
>
> But instead of returning the error code in pwrseq, host->pwrseq is
> returned which will always be 0. So mmc_of_parse() succeeds even if
> the pwrseq .alloc function failed and host->pwrseq is NULL.
>
> This makes the SDIO device to not be powered if the power sequencing
> .alloc functions wants to be deferred due a missing resource because
> the mmc controller driver probe did wrongly succeed.
>
> Fixes: 0f12a0ce4ce4a ("mmc: pwrseq: simplify alloc/free hooks")
> Signed-off-by: Javier Martinez Canillas <javier.martinez@...labora.co.uk>

I obviously overlooked that one. Thanks for fixing it.

Reviewed-by: Alexandre Courbot <acourbot@...dia.com>
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