linux-kernel - [PATCH] clocksource/drivers/exynos_mct: explicitly return 0 for shared timer

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Date:   Mon,  3 Apr 2023 11:40:17 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org
Cc:     Vincent Whitchurch <vincent.whitchurch@...s.com>,
        kernel test robot <lkp@...el.com>,
        Dan Carpenter <error27@...il.com>
Subject: [PATCH] clocksource/drivers/exynos_mct: explicitly return 0 for shared timer

For a shared timers, the mct_init_dt() should not initialize the clock
even with global comparator.  This is not an error, thus the function
should simply return 0, not 'ret'.

This also fixes smatch warning:

  drivers/clocksource/exynos_mct.c:635 mct_init_dt() warn: missing error code? 'ret'

Reported-by: kernel test robot <lkp@...el.com>
Reported-by: Dan Carpenter <error27@...il.com>
Link: https://lore.kernel.org/r/202304021446.46XVKag0-lkp@intel.com/
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
---
 drivers/clocksource/exynos_mct.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clocksource/exynos_mct.c b/drivers/clocksource/exynos_mct.c
index bfd60093ee1c..ef8cb1b71be4 100644
--- a/drivers/clocksource/exynos_mct.c
+++ b/drivers/clocksource/exynos_mct.c
@@ -677,17 +677,17 @@ static int __init mct_init_dt(struct device_node *np, unsigned int int_type)
 	if (ret)
 		return ret;
 
 	/*
 	 * When the FRC is shared with a main processor, this secondary
 	 * processor cannot use the global comparator.
 	 */
 	if (frc_shared)
-		return ret;
+		return 0;
 
 	return exynos4_clockevent_init();
 }
 
 
 static int __init mct_init_spi(struct device_node *np)
 {
 	return mct_init_dt(np, MCT_INT_SPI);
-- 
2.34.1