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X-IronPort-AV: E=Sophos;i="5.92,216,1650924000"; d="scan'208";a="24631789" Received: from vtuxmail01.tq-net.de ([10.115.0.20]) by mx1.tq-group.com with ESMTP; 23 Jun 2022 14:08:39 +0200 Received: from steina-w.localnet (unknown [10.123.49.12]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) by vtuxmail01.tq-net.de (Postfix) with ESMTPSA id C37F4280056; Thu, 23 Jun 2022 14:08:38 +0200 (CEST) From: Alexander Stein To: Saravana Kannan , Tony Lindgren Subject: Re: [PATCH v2 1/9] PM: domains: Delete usage of driver_deferred_probe_check_state() Date: Thu, 23 Jun 2022 14:08:38 +0200 Message-ID: <4799738.LvFx2qVVIh@steina-w> Organization: TQ-Systems GmbH In-Reply-To: References: <20220601070707.3946847-1-saravanak@google.com> <20220601070707.3946847-2-saravanak@google.com> MIME-Version: 1.0 Cc: Andrew Lunn , Ulf Hansson , "Rafael J. Wysocki" , Linus Walleij , Eric Dumazet , Pavel Machek , Will Deacon , Kevin Hilman , Russell King , Geert Uytterhoeven , Jakub Kicinski , Paolo Abeni , kernel-team@android.com, Len Brown , linux-pm@vger.kernel.org, linux-gpio@vger.kernel.org, Hideaki YOSHIFUJI , Greg Kroah-Hartman , David Ahern , linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, netdev@vger.kernel.org, "David S. Miller" , Heiner Kallweit X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" Hi, Am Dienstag, 21. Juni 2022, 09:28:43 CEST schrieb Tony Lindgren: > Hi, > > * Saravana Kannan [700101 02:00]: > > 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. > > Looks like this causes omaps to not boot in Linux next. With this > simple-pm-bus fails to probe initially as the power-domain is not > yet available. On platform_probe() genpd_get_from_provider() returns > -ENOENT. > > Seems like other stuff is potentially broken too, any ideas on > how to fix this? I think I'm hit by this as well, although I do not get a lockup. In my case I'm using arch/arm64/boot/dts/freescale/imx8mq-tqma8mq-mba8mx.dts and probing of 38320000.blk-ctrl fails as the power-domain is not (yet) registed. See the (filtered) dmesg output: > [ 0.744245] PM: Added domain provider from > /soc@0/bus@30000000/gpc@303a0000/pgc/power-domain@0 [ 0.744756] PM: > Added domain provider from > /soc@0/bus@30000000/gpc@303a0000/pgc/power-domain@2 [ 0.745012] PM: > Added domain provider from > /soc@0/bus@30000000/gpc@303a0000/pgc/power-domain@3 [ 0.745268] PM: > Added domain provider from > /soc@0/bus@30000000/gpc@303a0000/pgc/power-domain@4 [ 0.746121] PM: > Added domain provider from > /soc@0/bus@30000000/gpc@303a0000/pgc/power-domain@7 [ 0.746400] PM: > Added domain provider from > /soc@0/bus@30000000/gpc@303a0000/pgc/power-domain@8 [ 0.746665] PM: > Added domain provider from > /soc@0/bus@30000000/gpc@303a0000/pgc/power-domain@9 [ 0.746927] PM: > Added domain provider from > /soc@0/bus@30000000/gpc@303a0000/pgc/power-domain@a [ 0.748870] > imx8m-blk-ctrl 38320000.blk-ctrl: error -ENODEV: failed to attach bus power > domain [ 1.265279] PM: Added domain provider from > /soc@0/bus@30000000/gpc@303a0000/pgc/power-domain@5 [ 1.265861] PM: > Added domain provider from > /soc@0/bus@30000000/gpc@303a0000/pgc/power-domain@6 blk-ctrl@38320000 requires the power-domain 'pgc_vpu', which is power-domain@6 in pgc. Best regards, Alexander > > Signed-off-by: Saravana Kannan > > --- > > > > drivers/base/power/domain.c | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > 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); _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu