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firmware: Hold a reference for of_find_compatible_node() 

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>
Link: https://lore.kernel.org/r/20220628021640.4015-1-windhl@126.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Liang He 2022-06-28 10:16:40 +08:00 committed by Greg Kroah-Hartman
parent a244ec3640
commit c882716b6d
1 changed files with 6 additions and 2 deletions
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8
include/linux/firmware/trusted_foundations.h
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@ -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");
if (!np)
return;
of_node_put(np);
/*
* 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)