linux-kernel - Re: [PATCH 1/1]mmc: fix division by zero when calculate mmc erase time

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Message-ID: <AANLkTik8B0c0Bfv2O2-vcNUGGitywRjUXrGE44kP1cq4@mail.gmail.com>
Date:	Thu, 24 Feb 2011 13:35:46 +0100
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Chuanxiao Dong <chuanxiao.dong@...el.com>
Cc:	linux-mmc@...r.kernel.org, cjb@...top.org, adrian.hunter@...ia.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1]mmc: fix division by zero when calculate mmc erase time

2011/2/24 Chuanxiao Dong <chuanxiao.dong@...el.com>:
> Since if clock gating feature is enabled, the clock frequency may be zero when
> host clock is gated. In such scenario, mmc_set_mmc_erase_timeout() may have a
> division by zero bug.
>
> So this patch used mmc_host_clk_rate() to fix this.
>
> Signed-off-by: Chuanxiao Dong <chuanxiao.dong@...el.com>

Acked-by: Linus Walleij <linus.walleij@...aro.org>

Actually I think these divide-by zero bugs were there before since clock
0 is perfectly legal, we just didn't trigger them before.

Yours,
Linus Walleij
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