4.20-stable review patch. If anyone has any objections, please let me know.
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[ Upstream commit 5b3f5c408d8cc59b87e47f1ab9803dbd006e4a91 ]
The previous commit, "of: overlay: add missing of_node_get() in __of_attach_node_sysfs" added a missing of_node_get() to __of_attach_node_sysfs(). This results in a refcount imbalance for nodes attached with dlpar_attach_node(). The calling sequence from dlpar_attach_node() to __of_attach_node_sysfs() is:
dlpar_attach_node() of_attach_node() __of_attach_node_sysfs()
For more detailed description of the node refcount, see commit 68baf692c435 ("powerpc/pseries: Fix of_node_put() underflow during DLPAR remove").
Tested-by: Alan Tull atull@kernel.org Acked-by: Michael Ellerman mpe@ellerman.id.au Signed-off-by: Frank Rowand frank.rowand@sony.com Signed-off-by: Sasha Levin sashal@kernel.org --- arch/powerpc/platforms/pseries/dlpar.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/arch/powerpc/platforms/pseries/dlpar.c b/arch/powerpc/platforms/pseries/dlpar.c index 7625546caefd..17958043e7f7 100644 --- a/arch/powerpc/platforms/pseries/dlpar.c +++ b/arch/powerpc/platforms/pseries/dlpar.c @@ -270,6 +270,8 @@ int dlpar_detach_node(struct device_node *dn) if (rc) return rc;
+ of_node_put(dn); + return 0; }