The patch below does not apply to the 5.10-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.10.y git checkout FETCH_HEAD git cherry-pick -x 5a19143124be42900b3fbc9ada3c919632eb45eb # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2025032420-overstuff-legged-67d6@gregkh' --subject-prefix 'PATCH 5.10.y' HEAD^..
Possible dependencies:
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 5a19143124be42900b3fbc9ada3c919632eb45eb Mon Sep 17 00:00:00 2001 From: Haibo Chen haibo.chen@nxp.com Date: Fri, 14 Mar 2025 19:01:45 +0800 Subject: [PATCH] can: flexcan: disable transceiver during system PM
During system PM, if no wakeup requirement, disable transceiver to save power.
Fixes: 4de349e786a3 ("can: flexcan: fix resume function") Cc: stable@vger.kernel.org Reviewed-by: Frank Li frank.li@nxp.com Signed-off-by: Haibo Chen haibo.chen@nxp.com Link: https://patch.msgid.link/20250314110145.899179-2-haibo.chen@nxp.com [mkl: add newlines] Signed-off-by: Marc Kleine-Budde mkl@pengutronix.de
diff --git a/drivers/net/can/flexcan/flexcan-core.c b/drivers/net/can/flexcan/flexcan-core.c index 3a71fd235722..b080740bcb10 100644 --- a/drivers/net/can/flexcan/flexcan-core.c +++ b/drivers/net/can/flexcan/flexcan-core.c @@ -2260,6 +2260,10 @@ static int __maybe_unused flexcan_suspend(struct device *device)
flexcan_chip_interrupts_disable(dev);
+ err = flexcan_transceiver_disable(priv); + if (err) + return err; + err = pinctrl_pm_select_sleep_state(device); if (err) return err; @@ -2292,10 +2296,16 @@ static int __maybe_unused flexcan_resume(struct device *device) if (err) return err;
- err = flexcan_chip_start(dev); + err = flexcan_transceiver_enable(priv); if (err) return err;
+ err = flexcan_chip_start(dev); + if (err) { + flexcan_transceiver_disable(priv); + return err; + } + flexcan_chip_interrupts_enable(dev); }