linux-kernel - [next] arn: PM: domains: Delete usage of driver_deferred_probe_check

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Date:   Mon, 11 Jul 2022 16:31:48 +0530
From:   Naresh Kamboju <naresh.kamboju@...aro.org>
To:     open list <linux-kernel@...r.kernel.org>,
        Linux-Next Mailing List <linux-next@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        regressions@...ts.linux.dev, lkft-triage@...ts.linaro.org
Cc:     Geert Uytterhoeven <geert+renesas@...der.be>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Saravana Kannan <saravanak@...gle.com>,
        Anders Roxell <anders.roxell@...aro.org>
Subject: [next] arn: PM: domains: Delete usage of driver_deferred_probe_check_state()

Linux next arm BeagleBoard x15 device boot failed due to the
following commit. The x15 did not event showed any crash log
on the serial console.

Anders bisect this and found the first bad commit is

Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>

commit 5a46079a96451cfb15e4f5f01f73f7ba24ef851a
Author: Saravana Kannan <saravanak@...gle.com>
Date:   Wed Jun 1 00:06:57 2022 -0700

    PM: domains: Delete usage of driver_deferred_probe_check_state()

    Now that fw_devlink=on by default and fw_devlink supports
    "power-domains" property, the execution will never get to the point
    where driver_deferred_probe_check_state() is called before the supplier
    has probed successfully or before deferred probe timeout has expired.

    So, delete the call and replace it with -ENODEV.

    Tested-by: Geert Uytterhoeven <geert+renesas@...der.be>
    Reviewed-by: Ulf Hansson <ulf.hansson@...aro.org>
    Signed-off-by: Saravana Kannan <saravanak@...gle.com>
    Link: https://lore.kernel.org/r/20220601070707.3946847-2-saravanak@google.com
    Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 739e52cd4aba..3e86772d5fac 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -2730,7 +2730,7 @@ static int __genpd_dev_pm_attach(struct device
*dev, struct device *base_dev,
                mutex_unlock(&gpd_list_lock);
                dev_dbg(dev, "%s() failed to find PM domain: %ld\n",
                        __func__, PTR_ERR(pd));
-               return driver_deferred_probe_check_state(base_dev);
+               return -ENODEV;
        }

        dev_dbg(dev, "adding to PM domain %s\n", pd->name);



--
Linaro LKFT
https://lkft.linaro.org