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authorFrank Rowand <frank.rowand@sony.com>2018-12-18 11:40:03 -0800
committerRob Herring <robh@kernel.org>2018-12-21 12:42:36 -0600
commit5801169a2ed20003f771acecf3ac00574cf10a38 (patch)
tree56bcdc99f2d669033eea3c4308e52419a44ddc7e /scripts
parentof: of_node_get()/of_node_put() nodes held in phandle cache (diff)
downloadlinux-dev-5801169a2ed20003f771acecf3ac00574cf10a38.tar.xz
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of: __of_detach_node() - remove node from phandle cache
Non-overlay dynamic devicetree node removal may leave the node in the phandle cache. Subsequent calls to of_find_node_by_phandle() will incorrectly find the stale entry. Remove the node from the cache. Add paranoia checks in of_find_node_by_phandle() as a second level of defense (do not return cached node if detached, do not add node to cache if detached). Fixes: 0b3ce78e90fc ("of: cache phandle nodes to reduce cost of of_find_node_by_phandle()") Reported-by: Michael Bringmann <mwb@linux.vnet.ibm.com> Cc: stable@vger.kernel.org # v4.17+ Signed-off-by: Frank Rowand <frank.rowand@sony.com> Signed-off-by: Rob Herring <robh@kernel.org>
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