Re: [PATCH 2/2] mmc: prevent aggressive clock gating to race with ios updates

From: Linus Walleij
Date: Wed Aug 17 2011 - 03:56:28 EST


On Mon, Aug 15, 2011 at 12:03 PM, Mika Westerberg
<mika.westerberg@xxxxxxxxxxxxxxx> wrote:

> We have seen at least two different races when clock gating kicks in in a
> middle of ios structure update.
>
> First one happens when ios->clock is changed outside of aggressive clock
> gating framework, for example via mmc_set_clock(). The race might happen
> when we run following code:

Patch looks entirely sane if you deal with my considerations
in [1/2] replacing mmc_host_clk_gate_[disable|enable] with
plain mmc_host_clk_[ungate|gate]() or renamed versions
of these respectively.

Thanks,
Linus Walleij
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