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tty: serial: Fix refcount leak bug in ucc_uart.c

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In soc_info(), of_find_node_by_type() will return a node pointer
with refcount incremented. We should use of_node_put() when it is
not used anymore.

Acked-by: Timur Tabi <timur@kernel.org>
Signed-off-by: Liang He <windhl@126.com>
Link: https://lore.kernel.org/r/20220618060850.4058525-1-windhl@126.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Liang He 2022-06-18 14:08:50 +08:00 committed by Greg Kroah-Hartman
parent eb01611056
commit d24d7bb2cd
1 changed files with 2 additions and 0 deletions
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2
drivers/tty/serial/ucc_uart.c
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@ -1137,6 +1137,8 @@ static unsigned int soc_info(unsigned int *rev_h, unsigned int *rev_l)
/* No compatible property, so try the name. */
soc_string = np->name;
of_node_put(np);
/* Extract the SOC number from the "PowerPC," string */
if ((sscanf(soc_string, "PowerPC,%u", &soc) != 1) || !soc)
return 0;