This is a note to let you know that I've just added the patch titled regulator: core: Clear the supply pointer if enabling fails 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: regulator-core-clear-the-supply-pointer-if-enabling-fails.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 8e5356a73604f53da6a1e0756727cb8f9f7bba17 Mon Sep 17 00:00:00 2001 From: Jon Hunter <jonathanh@xxxxxxxxxx> Date: Thu, 21 Apr 2016 17:11:58 +0100 Subject: regulator: core: Clear the supply pointer if enabling fails From: Jon Hunter <jonathanh@xxxxxxxxxx> commit 8e5356a73604f53da6a1e0756727cb8f9f7bba17 upstream. During the resolution of a regulator's supply, we may attempt to enable the supply if the regulator itself is already enabled. If enabling the supply fails, then we will call _regulator_put() for the supply. However, the pointer to the supply has not been cleared for the regulator and this will cause a crash if we then unregister the regulator and attempt to call regulator_put() a second time for the supply. Fix this by clearing the supply pointer if enabling the supply after fails when resolving the supply for a regulator. Signed-off-by: Jon Hunter <jonathanh@xxxxxxxxxx> Signed-off-by: Mark Brown <broonie@xxxxxxxxxx> Cc: Julia Lawall <julia.lawall@xxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/regulator/core.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -1519,6 +1519,7 @@ static int regulator_resolve_supply(stru ret = regulator_enable(rdev->supply); if (ret < 0) { _regulator_put(rdev->supply); + rdev->supply = NULL; return ret; } } Patches currently in stable-queue which might be from jonathanh@xxxxxxxxxx are queue-4.4/regulator-core-clear-the-supply-pointer-if-enabling-fails.patch