linux-kernel - [PATCH AUTOSEL 5.16 057/217] soc: imx: gpcv2: Synchronously suspend MIX domains

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 17 Jan 2022 21:17:00 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Marek Vasut <marex@...x.de>,
        Frieder Schrempf <frieder.schrempf@...tron.de>,
        Lucas Stach <l.stach@...gutronix.de>,
        NXP Linux Team <linux-imx@....com>,
        Peng Fan <peng.fan@....com>, Shawn Guo <shawnguo@...nel.org>,
        Sasha Levin <sashal@...nel.org>, aford173@...il.com,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH AUTOSEL 5.16 057/217] soc: imx: gpcv2: Synchronously suspend MIX domains

From: Marek Vasut <marex@...x.de>

[ Upstream commit f756f435f7dd823f2d4bd593ce1bf3168def1308 ]

In case the following power domain sequence happens, iMX8M Mini always hangs:
  gpumix:on -> gpu:on -> gpu:off -> gpu:on
This is likely due to another quirk of the GPC block. This situation can be
prevented by always synchronously powering off both the domain and MIX domain.
Make it so. This turns the aforementioned sequence into:
  gpumix:on -> gpu:on -> gpu:off -> gpumix:off -> gpumix:on -> gpu:on

Signed-off-by: Marek Vasut <marex@...x.de>
Cc: Frieder Schrempf <frieder.schrempf@...tron.de>
Cc: Lucas Stach <l.stach@...gutronix.de>
Cc: NXP Linux Team <linux-imx@....com>
Cc: Peng Fan <peng.fan@....com>
Cc: Shawn Guo <shawnguo@...nel.org>
Acked-by: Lucas Stach <l.stach@...gutronix.de>
Signed-off-by: Shawn Guo <shawnguo@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/soc/imx/gpcv2.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/soc/imx/gpcv2.c b/drivers/soc/imx/gpcv2.c
index b8d52d8d29dbb..e757044ab7512 100644
--- a/drivers/soc/imx/gpcv2.c
+++ b/drivers/soc/imx/gpcv2.c
@@ -377,7 +377,7 @@ static int imx_pgc_power_down(struct generic_pm_domain *genpd)
 		}
 	}
 
-	pm_runtime_put(domain->dev);
+	pm_runtime_put_sync_suspend(domain->dev);
 
 	return 0;
 
-- 
2.34.1