linux-kernel - Re: [PATCH] soc: qcom: rpmh-rsc: Sleep waiting for tcs slots to be free

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Message-ID: <20200724202351.GK9185@codeaurora.org>
Date:   Fri, 24 Jul 2020 14:23:51 -0600
From:   Lina Iyer <ilina@...eaurora.org>
To:     Stephen Boyd <swboyd@...omium.org>
Cc:     Doug Anderson <dianders@...omium.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        Maulik Shah <mkshah@...eaurora.org>
Subject: Re: [PATCH] soc: qcom: rpmh-rsc: Sleep waiting for tcs slots to be
 free

On Fri, Jul 24 2020 at 14:11 -0600, Stephen Boyd wrote:
>Quoting Lina Iyer (2020-07-24 13:08:41)
>> On Fri, Jul 24 2020 at 14:01 -0600, Stephen Boyd wrote:
>> >Quoting Doug Anderson (2020-07-24 12:49:56)
>> >> Hi,
>> >>
>> >> On Fri, Jul 24, 2020 at 12:44 PM Stephen Boyd <swboyd@...omium.org> wrote:
>> >I think Lina was alluding to this earlier in this
>> >thread.
>> I was thinking more of threaded irq handler than a kthread to post the
>> requests. We went away from post-thread approach a few years ago.
>>
>
>Ok, got it. Why was the kthread approach abandoned?

Simplification mostly, I think. Also, somebody requested that when the
async call returns they would atleast be guaranteed that the request has
been posted not necessarily processed at the remote end.