From: Julia Lawall Julia.Lawall@lip6.fr
[ Upstream commit a841fd009e51c8c0a8f07c942e9ab6bb48da8858 ]
for_each_node_by_name 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_name(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 Signed-off-by: Michael Ellerman mpe@ellerman.id.au Link: https://lore.kernel.org/r/1448051604-25256-7-git-send-email-Julia.Lawall@lip... Signed-off-by: Sasha Levin sashal@kernel.org --- arch/powerpc/platforms/cell/iommu.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/arch/powerpc/platforms/cell/iommu.c b/arch/powerpc/platforms/cell/iommu.c index 14a582b212745..4edceff5791ad 100644 --- a/arch/powerpc/platforms/cell/iommu.c +++ b/arch/powerpc/platforms/cell/iommu.c @@ -1107,6 +1107,7 @@ static int __init cell_iommu_fixed_mapping_init(void) if (hbase < dbase || (hend > (dbase + dsize))) { pr_debug("iommu: hash window doesn't fit in" "real DMA window\n"); + of_node_put(np); return -1; } }