Received-SPF: pass (google.com: domain of linux-kernel+bounces-33283-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.199.223 as permitted sender) client-ip=147.75.199.223;
From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org,
	stable@vger.kernel.org
Cc: Ben Dooks <ben.dooks@codethink.co.uk>,
	Guenter Roeck <linux@roeck-us.net>,
	Wim Van Sebroeck <wim@linux-watchdog.org>,
	Sasha Levin <sashal@kernel.org>,
	xingyu.wu@starfivetech.com,
	samin.guo@starfivetech.com,
	linux-watchdog@vger.kernel.org
Subject: [PATCH AUTOSEL 6.7 61/88] watchdog: starfive: add lock annotations to fix context imbalances
Date: Mon, 22 Jan 2024 09:51:34 -0500
Message-ID: <20240122145608.990137-61-sashal@kernel.org>
In-Reply-To: <20240122145608.990137-1-sashal@kernel.org>
References: <20240122145608.990137-1-sashal@kernel.org>
Precedence: bulk
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit

From: Ben Dooks <ben.dooks@codethink.co.uk>

[ Upstream commit f77999887235f8c378af343df11a6bcedda5b284 ]

Add the necessary __acquires() and __releases() to the functions
that take and release the wdt lock to avoid the following sparse
warnings:

drivers/watchdog/starfive-wdt.c:204:13: warning: context imbalance in 'starfive_wdt_unlock' - wrong count at exit
drivers/watchdog/starfive-wdt.c:212:9: warning: context imbalance in 'starfive_wdt_lock' - unexpected unlock

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20231122085118.177589-1-ben.dooks@codethink.co.uk
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/watchdog/starfive-wdt.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/watchdog/starfive-wdt.c b/drivers/watchdog/starfive-wdt.c
index 5f501b41faf9..49b38ecc092d 100644
--- a/drivers/watchdog/starfive-wdt.c
+++ b/drivers/watchdog/starfive-wdt.c
@@ -202,12 +202,14 @@ static u32 starfive_wdt_ticks_to_sec(struct starfive_wdt *wdt, u32 ticks)
 
 /* Write unlock-key to unlock. Write other value to lock. */
 static void starfive_wdt_unlock(struct starfive_wdt *wdt)
+	__acquires(&wdt->lock)
 {
 	spin_lock(&wdt->lock);
 	writel(wdt->variant->unlock_key, wdt->base + wdt->variant->unlock);
 }
 
 static void starfive_wdt_lock(struct starfive_wdt *wdt)
+	__releases(&wdt->lock)
 {
 	writel(~wdt->variant->unlock_key, wdt->base + wdt->variant->unlock);
 	spin_unlock(&wdt->lock);
-- 
2.43.0