From: Geert Uytterhoeven Date: Tue, 3 Mar 2015 10:02:15 +0000 (+0100) Subject: powerpc/pmac: Fix DT refcount imbalance in pmac_pic_probe_oldstyle X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=8f910fd0d9d234764e89cb770940df2ece851e71;p=linux-beck.git powerpc/pmac: Fix DT refcount imbalance in pmac_pic_probe_oldstyle Internally, of_find_node_by_name() calls of_node_put() on its "from" parameter, which must not be done on "master", as it's still in use, and will be released manually later. This may cause a zero kref refcount. Call of_node_get() before to compensate for this. Signed-off-by: Geert Uytterhoeven Signed-off-by: Benjamin Herrenschmidt --- diff --git a/arch/powerpc/platforms/powermac/pic.c b/arch/powerpc/platforms/powermac/pic.c index 4c24bf60d39d..59cfc9d63c2d 100644 --- a/arch/powerpc/platforms/powermac/pic.c +++ b/arch/powerpc/platforms/powermac/pic.c @@ -321,6 +321,9 @@ static void __init pmac_pic_probe_oldstyle(void) max_irqs = max_real_irqs = 64; /* We might have a second cascaded heathrow */ + + /* Compensate for of_node_put() in of_find_node_by_name() */ + of_node_get(master); slave = of_find_node_by_name(master, "mac-io"); /* Check ordering of master & slave */