From 1915a718b1872edffcb13e5436a9f7302d3d36f0 Mon Sep 17 00:00:00 2001 From: Krzysztof Kozlowski Date: Thu, 12 Mar 2015 08:44:00 +0100 Subject: 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 Fixes: 9be0fcb5ed46 ("compal-laptop: add JHL90, battery & hwmon interface") Cc: Signed-off-by: Sebastian Reichel diff --git a/drivers/platform/x86/compal-laptop.c b/drivers/platform/x86/compal-laptop.c index eb9885e..bceb30b 100644 --- a/drivers/platform/x86/compal-laptop.c +++ b/drivers/platform/x86/compal-laptop.c @@ -1036,7 +1036,9 @@ static int compal_probe(struct platform_device *pdev) /* Power supply */ initialize_power_supply_data(data); - power_supply_register(&compal_device->dev, &data->psy); + err = power_supply_register(&compal_device->dev, &data->psy); + if (err < 0) + goto remove; platform_set_drvdata(pdev, data); -- cgit v0.10.2