FAILED: patch "[PATCH] serial: ma35d1: Fix clock reference leak in" failed to apply to 6.6-stable tree

[<gregkh@linuxfoundation.org>]

The patch below does not apply to the 6.6-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-6.6.y
git checkout FETCH_HEAD
git cherry-pick -x 98401cf912fe8a081ef8e500c421b6d957b55a99
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2026100517-epic-chomp-5963@gregkh' --subject-prefix 'PATCH 6.6.y' 'HEAD^..'

Possible dependencies:



thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 98401cf912fe8a081ef8e500c421b6d957b55a99 Mon Sep 17 00:00:00 2001
From: Wentao Liang <vulab@iscas.ac.cn>
Date: Thu, 17 Sep 2026 15:56:50 +0000
Subject: [PATCH] serial: ma35d1: Fix clock reference leak in
 ma35d1serial_probe()

of_clk_get() returns a clock with a reference that has to be released
with clk_put(). ma35d1serial_probe() never does that, so the reference
is leaked on the probe error paths and also when the port is removed.

Release it on the error paths and in ma35d1serial_remove().

Fixes: 930cbf92db01 ("tty: serial: Add Nuvoton ma35d1 serial driver support")
Cc: stable@kernel.org
Signed-off-by: Wentao Liang <vulab@iscas.ac.cn>
Link: https://patch.msgid.link/20260917155650.2161274-1-vulab@iscas.ac.cn
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/ma35d1_serial.c b/drivers/tty/serial/ma35d1_serial.c
index 920fe7ff5083..0809655f4395 100644
--- a/drivers/tty/serial/ma35d1_serial.c
+++ b/drivers/tty/serial/ma35d1_serial.c
@@ -728,7 +728,7 @@ static int ma35d1serial_probe(struct platform_device *pdev)
 
 	ret = clk_prepare_enable(up->clk);
 	if (ret)
-		goto err_iounmap;
+		goto err_put_clk;
 
 	if (up->port.line != 0)
 		up->port.uartclk = clk_get_rate(up->clk);
@@ -755,6 +755,9 @@ static int ma35d1serial_probe(struct platform_device *pdev)
 err_clk_disable:
 	clk_disable_unprepare(up->clk);
 
+err_put_clk:
+	clk_put(up->clk);
+
 err_iounmap:
 	iounmap(up->port.membase);
 	return ret;
@@ -770,6 +773,7 @@ static void ma35d1serial_remove(struct platform_device *dev)
 
 	uart_remove_one_port(&ma35d1serial_reg, port);
 	clk_disable_unprepare(up->clk);
+	clk_put(up->clk);
 }
 
 static int ma35d1serial_suspend(struct platform_device *dev, pm_message_t state)