[PATCH v2 1/5] firmware: arm_scpi: fix device_node leak in scpi_dev_domain_id
Xixin Liu <[email protected]>
| Newsgroups | org.kernel.vger.linux-clk,org.infradead.lists.linux-arm-kernel,org.kernel.vger.arm-scmi,org.kernel.vger.linux-kernel |
|---|---|
| Message-ID | <[email protected]> |
of_parse_phandle_with_args() takes a reference on clkspec.np that must be released with of_node_put(). scpi_dev_domain_id() returned clkspec.args[0] without dropping that reference, so every domain lookup leaked a device node. Paths such as scpi_dvfs_info() / cpufreq init call this per CPU, so the leak accumulates over time. Save the domain id, of_node_put(clkspec.np), then return the saved value. Signed-off-by: Xixin Liu <[email protected]> --- drivers/firmware/arm_scpi.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/firmware/arm_scpi.c b/drivers/firmware/arm_scpi.c index 2acad5fa5a28..43d6d9bbc7a9 100644 --- a/drivers/firmware/arm_scpi.c +++ b/drivers/firmware/arm_scpi.c @@ -661,12 +661,15 @@ static struct scpi_dvfs_info *scpi_dvfs_get_info(u8 domain) static int scpi_dev_domain_id(struct device *dev) { struct of_phandle_args clkspec; + int domain; if (of_parse_phandle_with_args(dev->of_node, "clocks", "#clock-cells", 0, &clkspec)) return -EINVAL; - return clkspec.args[0]; + domain = clkspec.args[0]; + of_node_put(clkspec.np); + return domain; } static struct scpi_dvfs_info *scpi_dvfs_info(struct device *dev) -- 2.53.0