| Message ID | 20220916020854.4089679-1-windhl@126.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2] ARM: OMAP2+: Hold reference returned from of_find_xxx API | expand |
diff --git a/arch/arm/mach-omap2/omap_twl.c b/arch/arm/mach-omap2/omap_twl.c index d4dab041324d..d56b33187244 100644 --- a/arch/arm/mach-omap2/omap_twl.c +++ b/arch/arm/mach-omap2/omap_twl.c @@ -213,10 +213,13 @@ static struct omap_voltdm_pmic omap4_core_pmic = { int __init omap4_twl_init(void) { struct voltagedomain *voltdm; + struct device_node *np = NULL; if (!cpu_is_omap44xx() || - of_find_compatible_node(NULL, NULL, "motorola,cpcap")) + (np = of_find_compatible_node(NULL, NULL, "motorola,cpcap"))) { + of_node_put(np); return -ENODEV; + } voltdm = voltdm_lookup("mpu"); omap_voltage_register_pmic(voltdm, &omap4_mpu_pmic);
In omap4_twl_init(), we should hold the reference returned from of_find_compatible_node() which has increased the refcount and then call of_node_put() with it when done. Note that we should initialize 'np' with NULL, otherwise there will be a bug to call of_node_put() with uninitialized 'np' when cpu_is_omap44xx() is false. Fixes: ccd369455a23 ("ARM: OMAP2+: Remove bogus warnings for machines without twl PMIC") Co-developed-by: Mengda Chen <chenmengda2009@163.com> Signed-off-by: Mengda Chen <chenmengda2009@163.com> Signed-off-by: Liang He <windhl@126.com> --- v2: (1) initialize 'np' with NULL, advised by Russell King (2) we use proper Co-developed-by tag based on kernel doc arch/arm/mach-omap2/omap_twl.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)