linux-kernel - [PATCH] clocksource: j-core: type fix init function return code

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Message-Id: <20160726123140.878340-1-arnd@arndb.de>
Date:	Tue, 26 Jul 2016 14:31:29 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Rich Felker <dalias@...c.org>
Cc:	Arnd Bergmann <arnd@...db.de>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org
Subject: [PATCH] clocksource: j-core: type fix init function return code

The CLOCKSOURCE_OF_DECLARE now takes a function that returns an 'int', but a this
new clocksource driver has just appeared in linux-next and causes a warning because
it has the old 'void' return value:

In file included from ../include/linux/clocksource.h:18:0,
                 from ../include/linux/clockchips.h:13,
                 from ../drivers/clocksource/jcore-pit.c:14:
include/linux/of.h:1006:20: error: comparison of distinct pointer types lacks a cast [-Werror]
        .data = (fn == (fn_type)NULL) ? fn : fn  }
                    ^

This adapts the jcore_pit_init() function to the correct return type.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
Fixes: e0aa0655c60b ("clocksource: add J-Core timer/clocksource driver")
---
The patch that introduces the warnign currently only exists in the linux-sh git
tree and showed up in linux-next this week.
---
 drivers/clocksource/jcore-pit.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/clocksource/jcore-pit.c b/drivers/clocksource/jcore-pit.c
index 373b9f954a5c..4a2f7803624b 100644
--- a/drivers/clocksource/jcore-pit.c
+++ b/drivers/clocksource/jcore-pit.c
@@ -154,7 +154,7 @@ static irqreturn_t jcore_timer_interrupt(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
-static void __init jcore_pit_init(struct device_node *node)
+static int __init jcore_pit_init(struct device_node *node)
 {
 	int err;
 	__iomem void *pit_base;
@@ -169,12 +169,14 @@ static void __init jcore_pit_init(struct device_node *node)
 	pit_base = of_iomap(node, 0);
 	if (!pit_base) {
 		pr_err("Error: Cannot map base address for J-Core PIT\n");
+		err = -ENXIO;
 		goto out;
 	}
 
 	pit_irq = irq_of_parse_and_map(node, 0);
 	if (!pit_irq) {
 		pr_err("Error: J-Core PIT has no IRQ\n");
+		err = -ENXIO;
 		goto out;
 	}
 
@@ -183,6 +185,7 @@ static void __init jcore_pit_init(struct device_node *node)
 	cs = kzalloc(sizeof *cs, GFP_KERNEL);
 	if (!cs) {
 		pr_err("Failed to allocate memory for clocksource\n");
+		err = ENOMEM;
 		goto out;
 	}
 	jcore_cs = &cs->cs;
@@ -207,12 +210,14 @@ static void __init jcore_pit_init(struct device_node *node)
 	pit_percpu = alloc_percpu(struct jcore_pit);
 	if (!pit_percpu) {
 		pr_err("Failed to allocate memory for clock event device\n");
+		err = ENOMEM;
 		goto out;
 	}
 
 	nb = kzalloc(sizeof *nb, GFP_KERNEL);
 	if (!nb) {
 		pr_err("Failed to allocate memory for J-Core PIT notifier\n");
+		err = ENOMEM;
 		goto out;
 	}
 
@@ -268,10 +273,11 @@ static void __init jcore_pit_init(struct device_node *node)
 
 	jcore_pit_local_init(this_cpu_ptr(pit_percpu));
 
-	return;
+	return 0;
 
 out:
 	pr_err("Could not initialize J-Core PIT driver\n");
+	return err;
 }
 
 CLOCKSOURCE_OF_DECLARE(jcore_pit, "jcore,pit", jcore_pit_init);
-- 
2.9.0