From: Michael Walle michael@walle.cc
In of_nvmem_cell_get(), of_get_next_parent() is used on cell_np. This will decrement the refcount on cell_np, but cell_np is still used later in the code. Use of_get_parent() instead and of_node_put() in the appropriate places.
Cc: stable@vger.kernel.org Fixes: 69aba7948cbe("nvmem: Add a simple NVMEM framework for consumers") Fixes: 7ae6478b304b ("nvmem: core: rework nvmem cell instance creation") Signed-off-by: Michael Walle michael@walle.cc Signed-off-by: Srinivas Kandagatla srinivas.kandagatla@linaro.org --- drivers/nvmem/core.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c index e92c6f1aadbb..cbe5df99db82 100644 --- a/drivers/nvmem/core.c +++ b/drivers/nvmem/core.c @@ -1237,16 +1237,21 @@ struct nvmem_cell *of_nvmem_cell_get(struct device_node *np, const char *id) if (!cell_np) return ERR_PTR(-ENOENT);
- nvmem_np = of_get_next_parent(cell_np); - if (!nvmem_np) + nvmem_np = of_get_parent(cell_np); + if (!nvmem_np) { + of_node_put(cell_np); return ERR_PTR(-EINVAL); + }
nvmem = __nvmem_device_get(nvmem_np, device_match_of_node); of_node_put(nvmem_np); - if (IS_ERR(nvmem)) + if (IS_ERR(nvmem)) { + of_node_put(cell_np); return ERR_CAST(nvmem); + }
cell_entry = nvmem_find_cell_entry_by_node(nvmem, cell_np); + of_node_put(cell_np); if (!cell_entry) { __nvmem_device_put(nvmem); return ERR_PTR(-ENOENT);