linux-kernel - Re: [PATCH v3 2/3] bus: sunxi-rsb: Support atomic transfers

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Message-ID: <3506150.LM0AJKV5NW@jernej-laptop>
Date:   Mon, 14 Nov 2022 21:49:58 +0100
From:   Jernej Škrabec <jernej.skrabec@...il.com>
To:     Chen-Yu Tsai <wens@...e.org>, Samuel Holland <samuel@...lland.org>
Cc:     Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-sunxi@...ts.linux.dev,
        Andre Przywara <andre.przywara@....com>,
        Samuel Holland <samuel@...lland.org>
Subject: Re: [PATCH v3 2/3] bus: sunxi-rsb: Support atomic transfers

Dne ponedeljek, 14. november 2022 ob 02:57:48 CET je Samuel Holland 
napisal(a):
> When communicating with a PMIC during system poweroff (pm_power_off()),
> IRQs are disabled and we are in a RCU read-side critical section, so we
> cannot use wait_for_completion_io_timeout(). Instead, poll the status
> register for transfer completion.
> 
> Fixes: d787dcdb9c8f ("bus: sunxi-rsb: Add driver for Allwinner Reduced
> Serial Bus") Signed-off-by: Samuel Holland <samuel@...lland.org>

Reviewed-by: Jernej Skrabec <jernej.skrabec@...il.com>

Best regards,
Jernej