linux-kernel - [PATCH v4 5/8] clkdev: Make clkdev

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Message-Id: <20210520140928.3252671-6-djrscally@gmail.com>
Date:   Thu, 20 May 2021 15:09:25 +0100
From:   Daniel Scally <djrscally@...il.com>
To:     "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Daniel Scally <djrscally@...il.com>,
        Wolfram Sang <wsa@...nel.org>,
        Lee Jones <lee.jones@...aro.org>,
        Hans de Goede <hdegoede@...hat.com>,
        Maximilian Luz <luzmaximilian@...il.com>,
        linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-gpio@...r.kernel.org,
        linux-i2c@...r.kernel.org, platform-driver-x86@...r.kernel.org,
        devel@...ica.org
Cc:     Len Brown <lenb@...nel.org>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Russell King <linux@...linux.org.uk>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Mark Gross <mgross@...ux.intel.com>,
        Robert Moore <robert.moore@...el.com>,
        Erik Kaneda <erik.kaneda@...el.com>,
        laurent.pinchart@...asonboard.com, kieran.bingham@...asonboard.com
Subject: [PATCH v4 5/8] clkdev: Make clkdev_drop() null aware

To simplify error handling paths, many functions are no-ops when passed
NULL pointers, for example gpiod_remove_lookup_table(). Mirror that
behaviour for clkdev_drop().

Signed-off-by: Daniel Scally <djrscally@...il.com>
---
Changes since v3:
	- Patch introduced

 drivers/clk/clkdev.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/clk/clkdev.c b/drivers/clk/clkdev.c
index 0f2e3fcf0f19..c082720f8ade 100644
--- a/drivers/clk/clkdev.c
+++ b/drivers/clk/clkdev.c
@@ -286,6 +286,9 @@ EXPORT_SYMBOL(clk_add_alias);
  */
 void clkdev_drop(struct clk_lookup *cl)
 {
+	if (!cl)
+		return;
+
 	mutex_lock(&clocks_mutex);
 	list_del(&cl->node);
 	mutex_unlock(&clocks_mutex);
-- 
2.25.1