summaryrefslogtreecommitdiff
path: root/drivers/nvmem
diff options
context:
space:
mode:
authorMichael Walle <michael@walle.cc>2023-01-27 13:40:12 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2023-01-28 16:38:44 +0300
commitedcf2fb660526b5ed29f93bd17328a2b4835c8b2 (patch)
tree9162c0af131401bb02733533b8d391ec5438cd20 /drivers/nvmem
parentab3428cfd9aa2f3463ee4b2909b5bb2193bd0c4a (diff)
downloadlinux-edcf2fb660526b5ed29f93bd17328a2b4835c8b2.tar.xz
nvmem: core: fix device node refcounting
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. Fixes: 69aba7948cbe ("nvmem: Add a simple NVMEM framework for consumers") Fixes: 7ae6478b304b ("nvmem: core: rework nvmem cell instance creation") Cc: stable@vger.kernel.org Signed-off-by: Michael Walle <michael@walle.cc> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20230127104015.23839-8-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/nvmem')
-rw-r--r--drivers/nvmem/core.c11
1 files 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);