RE: [PATCH v2 04/18] soc: imx: gpcv2: add lockdep annotation
From: Peng Fan <peng.fan@nxp.com>
Date: 2021-08-05 09:38:26
Also in:
linux-arm-kernel
Subject: [PATCH v2 04/18] soc: imx: gpcv2: add lockdep annotation Some of the GPCv2 power domains are nested inside each other without visibility to lockdep at the genpd level, as they are in separate driver instances and don't have a parent/child power-domain relationship. Add a subclass annotation to the nested domains to let lockdep know that it is okay to take the genpd lock in a nested fashion. Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
quoted hunk ↗ jump to hunk
--- drivers/soc/imx/gpcv2.c | 4 ++++ 1 file changed, 4 insertions(+)diff --git a/drivers/soc/imx/gpcv2.c b/drivers/soc/imx/gpcv2.c index2c43e74db0be..35f26f57d1ac 100644--- a/drivers/soc/imx/gpcv2.c +++ b/drivers/soc/imx/gpcv2.c@@ -898,6 +898,10 @@ static int imx_pgc_domain_probe(structplatform_device *pdev) goto out_domain_unmap; } + if (IS_ENABLED(CONFIG_LOCKDEP) && + of_property_read_bool(domain->dev->of_node, "power-domains")) + lockdep_set_subclass(&domain->genpd.mlock, 1); + ret = of_genpd_add_provider_simple(domain->dev->of_node, &domain->genpd); if (ret) { -- 2.30.2