Messages in this thread Patch in this message | | | From | Julia Lawall <> | Subject | [PATCH 4/6] powerpc/kexec: add missing of_node_put | Date | Fri, 20 Nov 2015 21:33:22 +0100 |
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for_each_node_by_type performs an of_node_get on each iteration, so a break out of the loop requires an of_node_put.
A simplified version of the semantic patch that fixes this problem is as follows (http://coccinelle.lip6.fr):
// <smpl> @@ expression e,e1; local idexpression n; @@
for_each_node_by_type(n, e1) { ... when != of_node_put(n) when != e = n ( return n; | + of_node_put(n); ? return ...; ) ... } // </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
--- arch/powerpc/kernel/machine_kexec_64.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/kernel/machine_kexec_64.c b/arch/powerpc/kernel/machine_kexec_64.c index 0fbd75d..4ba61ce 100644 --- a/arch/powerpc/kernel/machine_kexec_64.c +++ b/arch/powerpc/kernel/machine_kexec_64.c @@ -103,8 +103,10 @@ int default_machine_kexec_prepare(struct kimage *image) begin = image->segment[i].mem; end = begin + image->segment[i].memsz; - if ((begin < high) && (end > low)) + if ((begin < high) && (end > low)) { + of_node_put(node); return -ETXTBSY; + } } }
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