From: Michael Walle Date: Fri, 10 Mar 2023 09:48:45 +0000 (+0000) Subject: nvmem: core: return -ENOENT if nvmem cell is not found X-Git-Tag: v6.3-rc3~3^2~1 X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=06be62083c5308c76a891ca975d66d832e2afc07;p=tomoyo%2Ftomoyo-test1.git nvmem: core: return -ENOENT if nvmem cell is not found Prior to commit 5d8e6e6c10a3 ("nvmem: core: add an index parameter to the cell") of_nvmem_cell_get() would return -ENOENT if the cell wasn't found. Particularly, if of_property_match_string() returned -EINVAL, that return code was passed as the index to of_parse_phandle(), which then detected it as invalid and returned NULL. That led to an return code of -ENOENT. With the new code, the negative index will lead to an -EINVAL of of_parse_phandle_with_optional_args() which pass straight to the caller and break those who expect an -ENOENT. Fix it by always returning -ENOENT. Fixes: 5d8e6e6c10a3 ("nvmem: core: add an index parameter to the cell") Reported-by: Alexander Stein Link: https://lore.kernel.org/r/2143916.GUh0CODmnK@steina-w/ Signed-off-by: Michael Walle Tested-by: Alexander Stein Signed-off-by: Srinivas Kandagatla Link: https://lore.kernel.org/r/20230310094845.139400-1-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c index 174ef3574e07..22024b830788 100644 --- a/drivers/nvmem/core.c +++ b/drivers/nvmem/core.c @@ -1231,7 +1231,7 @@ struct nvmem_cell *of_nvmem_cell_get(struct device_node *np, const char *id) "#nvmem-cell-cells", index, &cell_spec); if (ret) - return ERR_PTR(ret); + return ERR_PTR(-ENOENT); if (cell_spec.args_count > 1) return ERR_PTR(-EINVAL);