drivers/base/memory: fix an unlikely reference counting issue in __add_memory_block()
__add_memory_block() calls both put_device() and device_unregister() when storing the memory block into the xarray. This is incorrect because xarray doesn't take an additional reference and device_unregister() already calls put_device(). Triggering the issue looks really unlikely and its only effect should be to log a spurious warning about a ref counted issue. Link: https://lkml.kernel.org/r/d44c63d78affe844f020dc02ad6af29abc448fc4.1650611702.git.christophe.jaillet@wanadoo.fr Fixes: 4fb6eabf ("drivers/base/memory.c: cache memory blocks in xarray to accelerate lookup") Signed-off-by:Christophe JAILLET <christophe.jaillet@wanadoo.fr> Acked-by:
Michal Hocko <mhocko@suse.com> Reviewed-by:
David Hildenbrand <david@redhat.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: "Rafael J. Wysocki" <rafael@kernel.org> Cc: Scott Cheloha <cheloha@linux.vnet.ibm.com> Cc: Nathan Lynch <nathanl@linux.ibm.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org>
parent
ca2864e5
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