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authorFrank Rowand <frank.rowand@sony.com>2020-04-16 16:42:50 -0500
committerRob Herring <robh@kernel.org>2020-04-17 08:31:34 -0500
commit29acfb65598f91671413869e0d0a1ec4e74ac705 (patch)
tree836b074bbb04e9e3ef6ed08aad5491b66cb00b67 /scripts/dtc
parent478ff649b1c8eb2409b1a54fb75eb46f7c29f140 (diff)
downloadlinux-29acfb65598f91671413869e0d0a1ec4e74ac705.tar.bz2
of: unittest: kmemleak in duplicate property update
kmemleak reports several memory leaks from devicetree unittest. This is the fix for problem 5 of 5. When overlay 'overlay_bad_add_dup_prop' is applied, the apply code properly detects that a memory leak will occur if the overlay is removed since the duplicate property is located in a base devicetree node and reports via printk(): OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/substation@100/motor-1/rpm_avail OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/substation@100/motor-1/rpm_avail The overlay is removed when the apply code detects multiple changesets modifying the same property. This is reported via printk(): OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/rpm_avail As a result of this error, the overlay is removed resulting in the expected memory leak. Add another device node level to the overlay so that the duplicate property is located in a node added by the overlay, thus no memory leak will occur when the overlay is removed. Thus users of kmemleak will not have to debug this leak in the future. Fixes: 2fe0e8769df9 ("of: overlay: check prevents multiple fragments touching same property") Reported-by: Erhard F. <erhard_f@mailbox.org> Signed-off-by: Frank Rowand <frank.rowand@sony.com> Signed-off-by: Rob Herring <robh@kernel.org>
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