diff options
| author | Alban Bedel <albeu@free.fr> | 2019-01-28 15:55:03 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-01-31 16:24:14 +0100 |
| commit | d4e7fef1a9a5d2bf3f859ba9f50f4d5409a09ab0 (patch) | |
| tree | 441f6de49efc28711535143afa244f62746645fc /drivers/nvmem | |
| parent | 1c83267473b881cf75247acf1129456ef33aba86 (diff) | |
| download | linux-0-day-d4e7fef1a9a5d2bf3f859ba9f50f4d5409a09ab0.tar.gz linux-0-day-d4e7fef1a9a5d2bf3f859ba9f50f4d5409a09ab0.tar.xz | |
nvmem: core: Properly handle connection ID in of_nvmem_device_get()
of_nvmem_device_get() would crash if NULL was passed as a connection
ID. Rework this to use the usual sementic of assuming the first
connection when no connection ID is given.
Furthermore of_nvmem_device_get() would return -EINVAL when it failed
to resolve the connection, making it impossible to properly implement
an optional connection. Return -ENOENT instead to let the caller know
that the connection doesn't exists.
Signed-off-by: Alban Bedel <albeu@free.fr>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/nvmem')
| -rw-r--r-- | drivers/nvmem/core.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c index a2ad44104aa22..a749a5cb0a4e3 100644 --- a/drivers/nvmem/core.c +++ b/drivers/nvmem/core.c @@ -839,13 +839,14 @@ struct nvmem_device *of_nvmem_device_get(struct device_node *np, const char *id) { struct device_node *nvmem_np; - int index; + int index = 0; - index = of_property_match_string(np, "nvmem-names", id); + if (id) + index = of_property_match_string(np, "nvmem-names", id); nvmem_np = of_parse_phandle(np, "nvmem", index); if (!nvmem_np) - return ERR_PTR(-EINVAL); + return ERR_PTR(-ENOENT); return __nvmem_device_get(nvmem_np, NULL); } |