From: Nicolas Boichat drinkcat@chromium.org
[ Upstream commit 4007844b05815717f522c7ea9914e24ad0ff6c79 ]
In the error case, where a power domain cannot be powered on successfully at boot time (in mtk_register_power_domains), pm_genpd_init would still be called with is_off=false, and the system would later try to disable the power domain again, triggering warnings as disabled clocks are disabled again (and other potential issues).
Also print a warning splat in that case, as this should never happen.
Fixes: c84e358718a66f7 ("soc: Mediatek: Add SCPSYS power domain driver") Signed-off-by: Nicolas Boichat drinkcat@chromium.org Link: https://lore.kernel.org/r/20200928113107.v2.1.I5e6f8c262031d0451fe7241b744f4... Signed-off-by: Matthias Brugger matthias.bgg@gmail.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/soc/mediatek/mtk-scpsys.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/soc/mediatek/mtk-scpsys.c b/drivers/soc/mediatek/mtk-scpsys.c index f669d3754627d..ca75b14931ec9 100644 --- a/drivers/soc/mediatek/mtk-scpsys.c +++ b/drivers/soc/mediatek/mtk-scpsys.c @@ -524,6 +524,7 @@ static void mtk_register_power_domains(struct platform_device *pdev, for (i = 0; i < num; i++) { struct scp_domain *scpd = &scp->domains[i]; struct generic_pm_domain *genpd = &scpd->genpd; + bool on;
/* * Initially turn on all domains to make the domains usable @@ -531,9 +532,9 @@ static void mtk_register_power_domains(struct platform_device *pdev, * software. The unused domains will be switched off during * late_init time. */ - genpd->power_on(genpd); + on = !WARN_ON(genpd->power_on(genpd) < 0);
- pm_genpd_init(genpd, NULL, false); + pm_genpd_init(genpd, NULL, !on); }
/*