[PATCH] powerpc: sysdev: xive: Fix refcount leak in native.c

[Liang He]

In xive_native_init(), of_find_compatible_node() will return a
node pointer with refcount incremented. We should use of_node_put()
in each fail path or when it is not used anymore.

Signed-off-by: Liang He <win...@126.com>
---
 arch/powerpc/sysdev/xive/native.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/arch/powerpc/sysdev/xive/native.c 
b/arch/powerpc/sysdev/xive/native.c
index d25d8c692909..3925825954bc 100644
--- a/arch/powerpc/sysdev/xive/native.c
+++ b/arch/powerpc/sysdev/xive/native.c
@@ -579,12 +579,12 @@ bool __init xive_native_init(void)
        /* Resource 1 is HV window */
        if (of_address_to_resource(np, 1, &r)) {
                pr_err("Failed to get thread mgmnt area resource\n");
-               return false;
+               goto err_put;
        }
        tima = ioremap(r.start, resource_size(&r));
        if (!tima) {
                pr_err("Failed to map thread mgmnt area\n");
-               return false;
+               goto err_put;
        }
 
        /* Read number of priorities */
@@ -612,7 +612,7 @@ bool __init xive_native_init(void)
        /* Resource 2 is OS window */
        if (of_address_to_resource(np, 2, &r)) {
                pr_err("Failed to get thread mgmnt area resource\n");
-               return false;
+               goto err_put;
        }
 
        xive_tima_os = r.start;
@@ -624,7 +624,7 @@ bool __init xive_native_init(void)
        rc = opal_xive_reset(OPAL_XIVE_MODE_EXPL);
        if (rc) {
                pr_err("Switch to exploitation mode failed with error %lld\n", 
rc);
-               return false;
+               goto err_put;
        }
 
        /* Setup some dummy HV pool VPs */
@@ -634,10 +634,15 @@ bool __init xive_native_init(void)
        if (!xive_core_init(np, &xive_native_ops, tima, TM_QW3_HV_PHYS,
                            max_prio)) {
                opal_xive_reset(OPAL_XIVE_MODE_EMU);
-               return false;
+               goto err_put;
        }
+       of_node_put(np);
        pr_info("Using %dkB queues\n", 1 << (xive_queue_shift - 10));
        return true;
+
+err_put:
+       of_node_put(np);
+       return false;
 }
 
 static bool xive_native_provision_pages(void)
-- 
2.25.1