linux-kernel - Re: [PATCH v3] hwmon: xgene: Fix crash when alarm occurs before driver probe

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Date:   Thu, 8 Sep 2016 21:25:39 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Hoan Tran <hotran@....com>, Jean Delvare <jdelvare@...e.com>
Cc:     linux-hwmon@...r.kernel.org, linux-kernel@...r.kernel.org,
        Itaru Kitayama <itaru.kitayama@...en.jp>, lho@....com,
        Duc Dang <dhdang@....com>
Subject: Re: [PATCH v3] hwmon: xgene: Fix crash when alarm occurs before
 driver probe

On 09/08/2016 09:33 AM, Hoan Tran wrote:
> The system crashes during probing xgene-hwmon driver when temperature
> alarm interrupt occurs before.
> It's because
>  - xgene_hwmon_probe() requests mailbox channel which also enables
> the mailbox interrupt.
>  - As temperature alarm interrupt is pending, ISR runs and crashes when accesses
> into invalid resourse as unmapped PCC shared memory.
>
> This patch fixes this issue by saving this alarm message and scheduling a
> bottom handler after xgene_hwmon_probe() finish.
>
> Signed-off-by: Hoan Tran <hotran@....com>
> Reported-by: Itaru Kitayama <itaru.kitayama@...en.jp>
> ---

Applied to -next.

Thanks,
Guenter