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Message-ID: <20240627091137.370572-5-herve.codina@bootlin.com>
Date: Thu, 27 Jun 2024 11:11:33 +0200
From: Herve Codina <herve.codina@...tlin.com>
To: Andy Shevchenko <andy.shevchenko@...il.com>,
Simon Horman <horms@...nel.org>,
Herve Codina <herve.codina@...tlin.com>,
Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Lee Jones <lee@...nel.org>,
Arnd Bergmann <arnd@...db.de>,
UNGLinuxDriver@...rochip.com,
Saravana Kannan <saravanak@...gle.com>,
Bjorn Helgaas <bhelgaas@...gle.com>,
Philipp Zabel <p.zabel@...gutronix.de>,
Lars Povlsen <lars.povlsen@...rochip.com>,
Steen Hegelund <Steen.Hegelund@...rochip.com>,
Daniel Machon <daniel.machon@...rochip.com>
Cc: "David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Horatiu Vultur <horatiu.vultur@...rochip.com>,
Andrew Lunn <andrew@...n.ch>,
linux-kernel@...r.kernel.org,
devicetree@...r.kernel.org,
netdev@...r.kernel.org,
linux-pci@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
Allan Nielsen <allan.nielsen@...rochip.com>,
Steen Hegelund <steen.hegelund@...rochip.com>,
Luca Ceresoli <luca.ceresoli@...tlin.com>,
Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
Clément Léger <clement.leger@...tlin.com>
Subject: [PATCH v3 4/7] reset: core: add get_device()/put_device on rcdev
From: Clément Léger <clement.leger@...tlin.com>
Since the rcdev structure is allocated by the reset controller drivers
themselves, they need to exists as long as there is a consumer. A call to
module_get() is already existing but that does not work when using
device-tree overlays. In order to guarantee that the underlying reset
controller device does not vanish while using it, add a get_device() call
when retrieving a reset control from a reset controller device and a
put_device() when releasing that control.
Signed-off-by: Clément Léger <clement.leger@...tlin.com>
Signed-off-by: Herve Codina <herve.codina@...tlin.com>
---
drivers/reset/core.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/reset/core.c b/drivers/reset/core.c
index dba74e857be6..999c3c41cf21 100644
--- a/drivers/reset/core.c
+++ b/drivers/reset/core.c
@@ -812,6 +812,7 @@ __reset_control_get_internal(struct reset_controller_dev *rcdev,
kref_init(&rstc->refcnt);
rstc->acquired = acquired;
rstc->shared = shared;
+ get_device(rcdev->dev);
return rstc;
}
@@ -826,6 +827,7 @@ static void __reset_control_release(struct kref *kref)
module_put(rstc->rcdev->owner);
list_del(&rstc->list);
+ put_device(rstc->rcdev->dev);
kfree(rstc);
}
--
2.45.0
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