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The count_threshold should be checked unconditionally, after insertion too, so that a count_threshold value of 1 can cause an immediate offlining. I.e., offline the page on the *first* error encountered. Add comments to make it clear what cec_add_elem() does, while at it. Reported-by: WANG Chao <chao.wang@ucloud.cn> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Tony Luck <tony.luck@intel.com> Cc: linux-edac@vger.kernel.org Link: https://lkml.kernel.org/r/20190418034115.75954-3-chao.wang@ucloud.cn