From 6ffb5b0ec9811f71c8f8b48d5ee955064356b528 Mon Sep 17 00:00:00 2001
From: Saravana Kannan <saravanak@google.com>
Date: Tue, 17 Oct 2023 18:38:50 -0700
Subject: [PATCH] driver core: Release all resources during unbind before
updating device links
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
commit 2e84dc37920012b458e9458b19fc4ed33f81bc74 upstream.
This commit fixes a bug in commit 9ed9895370ae ("driver core: Functional
dependencies tracking support") where the device link status was
incorrectly updated in the driver unbind path before all the device's
resources were released.
Fixes: 9ed9895370ae ("driver core: Functional dependencies tracking support")
Cc: stable <stable@kernel.org>
Reported-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Closes: https://lore.kernel.org/all/20231014161721.f4iqyroddkcyoefo@pengutronix.de/
Signed-off-by: Saravana Kannan <saravanak@google.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Yang Yingliang <yangyingliang@huawei.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Matti Vaittinen <mazziesaccount@gmail.com>
Cc: James Clark <james.clark@arm.com>
Acked-by: "Rafael J. Wysocki" <rafael@kernel.org>
Tested-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20231018013851.3303928-1-saravanak@google.com
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/base/dd.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index 1abd39ed3f9f3..7941a8fd22841 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -1162,8 +1162,6 @@ static void __device_release_driver(struct device *dev, struct device *parent)
else if (drv->remove)
drv->remove(dev);
- device_links_driver_cleanup(dev);
-
devres_release_all(dev);
arch_teardown_dma_ops(dev);
dev->driver = NULL;
@@ -1173,6 +1171,8 @@ static void __device_release_driver(struct device *dev, struct device *parent)
pm_runtime_reinit(dev);
dev_pm_set_driver_flags(dev, 0);
+ device_links_driver_cleanup(dev);
+
klist_remove(&dev->p->knode_driver);
device_pm_check_callbacks(dev);
if (dev->bus)
--
GitLab