tree fdeaf4bd48e2bb424ecbf0decc05bbcf3c6d0112
parent ad774702f1705c04e5fa492b793d8d477a504fa6
author Krzysztof Kozlowski <k.kozlowski@samsung.com> 1426146240 +0100
committer Sebastian Reichel <sre@kernel.org> 1426283572 +0100

compal-laptop: Check return value of power_supply_register

The return value of power_supply_register() call was not checked and
even on error probe() function returned 0. If registering failed then
during unbind the driver tried to unregister power supply which was not
actually registered.

This could lead to memory corruption because power_supply_unregister()
unconditionally cleans up given power supply.

Fix this by checking return status of power_supply_register() call. In
case of failure, clean up sysfs entries and fail the probe.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Fixes: 9be0fcb5ed46 ("compal-laptop: add JHL90, battery & hwmon interface")
Cc: <stable@vger.kernel.org>
Signed-off-by: Sebastian Reichel <sre@kernel.org>