This is a note to let you know that I've just added the patch titled
can: m_can_platform: don't call m_can_class_suspend in runtime suspend
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
can-m_can_platform-don-t-call-m_can_class_suspend-in-runtime-suspend.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Sat Oct 17 11:01:11 AM CEST 2020
From: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
Date: Tue, 11 Aug 2020 10:15:44 +0200
Subject: can: m_can_platform: don't call m_can_class_suspend in runtime suspend
From: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
[ Upstream commit 81f1f5ae8b3cbd54fdd994c9e9aacdb7b414a802 ]
0704c5743694 can: m_can_platform: remove unnecessary m_can_class_resume() call
removed the m_can_class_resume() call in the runtime resume path to get
rid of a infinite recursion, so the runtime resume now only handles the device
clocks.
Unfortunately it did not remove the complementary m_can_class_suspend() call in
the runtime suspend function, so those paths are now unbalanced, which causes
the pinctrl state to get stuck on the "sleep" state, which breaks all CAN
functionality on SoCs where this state is defined. Remove the
m_can_class_suspend() call to fix this.
Fixes: 0704c5743694 can: m_can_platform: remove unnecessary m_can_class_resume() call
Signed-off-by: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20200811081545.19921-1-l.stach@xxxxxxxxxxxxxx
Acked-by: Dan Murphy <dmurphy@xxxxxx>
Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/can/m_can/m_can_platform.c | 2 --
1 file changed, 2 deletions(-)
--- a/drivers/net/can/m_can/m_can_platform.c
+++ b/drivers/net/can/m_can/m_can_platform.c
@@ -144,8 +144,6 @@ static int __maybe_unused m_can_runtime_
struct net_device *ndev = dev_get_drvdata(dev);
struct m_can_classdev *mcan_class = netdev_priv(ndev);
- m_can_class_suspend(dev);
-
clk_disable_unprepare(mcan_class->cclk);
clk_disable_unprepare(mcan_class->hclk);
Patches currently in stable-queue which might be from l.stach@xxxxxxxxxxxxxx are
queue-5.4/can-m_can_platform-don-t-call-m_can_class_suspend-in-runtime-suspend.patch
