linux-kernel - Re: [RFC PATCH] drivers core: cpu: add hotplug callback to update cpu

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Date:   Sun, 27 Jan 2019 14:57:37 +0100
From:   Eugeniu Rosca <roscaeugeniu@...il.com>
To:     Sudeep Holla <sudeep.holla@....com>
Cc:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jisheng Zhang <jszhang@...vell.com>,
        Steve Longerbeam <steve_longerbeam@...tor.com>,
        Joshua Frkuska <joshua_frkuska@...tor.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Eugeniu Rosca <erosca@...adit-jv.com>,
        Eugeniu Rosca <rosca.eugeniu@...il.com>
Subject: Re: [RFC PATCH] drivers core: cpu: add hotplug callback to update
 cpu_dev state to resumed

FWIW the "cache: parent cpuN should not be sleeping" warnings no longer
appear during s2ram procedure on R-Car H3-ES20 Salvator-X with this patch.
The kernel version is v5.0-rc3-241-g7c2614bf7a1f.
The test procedure is:

root@...vator-x:~# modprobe i2c-dev
root@...vator-x:~# i2cset -f -y 7 0x30 0x20 0x0F
root@...vator-x:~# echo deep > /sys/power/mem_sleep
root@...vator-x:~# echo mem > /sys/power/state

Tested-by: Eugeniu Rosca <erosca@...adit-jv.com>