linux-kernel - Re: [PATCH v17 2/4] dmaengine: tegra: Add tegra gpcdma driver

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Message-ID: <dcd4e4db-2999-15c9-0c82-42dd8ca1e61d@gmail.com>
Date:   Sun, 30 Jan 2022 13:26:47 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Akhil R <akhilrajeev@...dia.com>, devicetree@...r.kernel.org,
        dmaengine@...r.kernel.org, jonathanh@...dia.com,
        kyarlagadda@...dia.com, ldewangan@...dia.com,
        linux-kernel@...r.kernel.org, linux-tegra@...r.kernel.org,
        p.zabel@...gutronix.de, rgumasta@...dia.com, robh+dt@...nel.org,
        thierry.reding@...il.com, vkoul@...nel.org
Cc:     Pavan Kunapuli <pkunapuli@...dia.com>
Subject: Re: [PATCH v17 2/4] dmaengine: tegra: Add tegra gpcdma driver

30.01.2022 13:05, Dmitry Osipenko пишет:
> Still nothing prevents interrupt handler to fire during the pause.
> 
> What you actually need to do is to disable/enable interrupt. This will
> prevent the interrupt racing and then pause/resume may look like this:

Although, seems this won't work, unfortunately. I see now that
device_pause() doesn't have might_sleep().