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watchdog: starfive: add lock annotations to fix context imbalances 

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>
This commit is contained in:
Ben Dooks 2023-11-22 08:51:18 +00:00 committed by Wim Van Sebroeck
parent 137c9e08e5
commit f779998872
1 changed files with 2 additions and 0 deletions
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drivers/watchdog/starfive-wdt.c
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@ -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);