This is a note to let you know that I've just added the patch titled watchdog: bcm281xx: Fix use of uninitialized spinlock. to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: watchdog-bcm281xx-fix-use-of-uninitialized-spinlock.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From fedf266f9955d9a019643cde199a2fd9a0259f6f Mon Sep 17 00:00:00 2001 From: Eric Anholt <eric@xxxxxxxxxx> Date: Thu, 27 Apr 2017 18:02:32 -0700 Subject: watchdog: bcm281xx: Fix use of uninitialized spinlock. From: Eric Anholt <eric@xxxxxxxxxx> commit fedf266f9955d9a019643cde199a2fd9a0259f6f upstream. The bcm_kona_wdt_set_resolution_reg() call takes the spinlock, so initialize it earlier. Fixes a warning at boot with lock debugging enabled. Fixes: 6adb730dc208 ("watchdog: bcm281xx: Watchdog Driver") Signed-off-by: Eric Anholt <eric@xxxxxxxxxx> Reviewed-by: Florian Fainelli <f.fainelli@xxxxxxxxx> Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx> Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx> Signed-off-by: Wim Van Sebroeck <wim@xxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/watchdog/bcm_kona_wdt.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/watchdog/bcm_kona_wdt.c +++ b/drivers/watchdog/bcm_kona_wdt.c @@ -304,6 +304,8 @@ static int bcm_kona_wdt_probe(struct pla if (!wdt) return -ENOMEM; + spin_lock_init(&wdt->lock); + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); wdt->base = devm_ioremap_resource(dev, res); if (IS_ERR(wdt->base)) @@ -316,7 +318,6 @@ static int bcm_kona_wdt_probe(struct pla return ret; } - spin_lock_init(&wdt->lock); platform_set_drvdata(pdev, wdt); watchdog_set_drvdata(&bcm_kona_wdt_wdd, wdt); bcm_kona_wdt_wdd.parent = &pdev->dev; Patches currently in stable-queue which might be from eric@xxxxxxxxxx are queue-4.4/watchdog-bcm281xx-fix-use-of-uninitialized-spinlock.patch