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platform/x86: dell-wmi-sysman: Make it safe to call exit_foo_attribut…
…es() multiple times [ Upstream commit 2d0c418 ] During some of the error-exit paths it is possible that release_attributes_data() will get called multiple times, which results in exit_foo_attributes() getting called multiple times. Make it safe to call exit_foo_attributes() multiple times, avoiding double-free()s in this case. Note that release_attributes_data() really should only be called once during error-exit paths. This will be fixed in a separate patch and it is good to have the exit_foo_attributes() functions modified this way regardless. Fixes: e8a60aa ("platform/x86: Introduce support for Systems Management Driver over WMI for Dell Systems") Cc: Divya Bharathi <Divya_Bharathi@dell.com> Cc: Mario Limonciello <mario.limonciello@dell.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Link: https://lore.kernel.org/r/20210321115901.35072-4-hdegoede@redhat.com Signed-off-by: Sasha Levin <sashal@kernel.org>
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