linux-kernel - Re: [PATCH] Revert "rpmsg: smd: Create device for all channels"

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Message-ID: <152113980179.111154.13908491838747798092@swboyd.mtv.corp.google.com>
Date:   Thu, 15 Mar 2018 11:50:01 -0700
From:   Stephen Boyd <swboyd@...omium.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        Ohad Ben-Cohen <ohad@...ery.com>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Cc:     linux-remoteproc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH] Revert "rpmsg: smd: Create device for all channels"

Quoting Bjorn Andersson (2018-03-15 11:12:44)
> In an effort to pick up channels that are in a funky state we
> optimistically tried to open all channels that we found, with the
> addition that we failed if the other side did not handshake the opening.
> 
> But as we're starting the modem a second time all channels are found -
> in a "funky" state - and we try to open them. But the modem firmware
> requires the IPCRTR to be up in order to initialize. So any channels we
> try to open before that will fail and will not be opened again.
> 
> This takes care of the regression, at the cost of reintroducing the
> previous behavior of handling of channels with "funky" states.

Is it a funky chicken and egg problem between IPCRTR and smd?