Messages in this thread Patch in this message | | | From | Liang He <> | Subject | [PATCH] firmware: Hold a reference for of_find_compatible_node() | Date | Tue, 21 Jun 2022 11:26:25 +0800 |
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In of_register_trusted_foundations(), we need to hold the reference returned by of_find_compatible_node() and then use it to call of_node_put() for refcount balance.
Signed-off-by: Liang He <windhl@126.com> --- include/linux/firmware/trusted_foundations.h | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/include/linux/firmware/trusted_foundations.h b/include/linux/firmware/trusted_foundations.h index be5984bda592..399471c2f1c7 100644 --- a/include/linux/firmware/trusted_foundations.h +++ b/include/linux/firmware/trusted_foundations.h @@ -71,12 +71,16 @@ static inline void register_trusted_foundations( static inline void of_register_trusted_foundations(void) { + struct device_node *np = of_find_compatible_node(NULL, NULL, "tlm,trusted-foundations"); + + of_node_put(np); + if (!np) + return; /* * If we find the target should enable TF but does not support it, * fail as the system won't be able to do much anyway */ - if (of_find_compatible_node(NULL, NULL, "tlm,trusted-foundations")) - register_trusted_foundations(NULL); + register_trusted_foundations(NULL); } static inline bool trusted_foundations_registered(void) -- 2.25.1
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