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nvmem: core: Check input parameter for NULL in nvmem_unregister()

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nvmem_unregister() frees resources and standard pattern is to allow
caller to not care if it's NULL or not. This will reduce burden on
the callers to perform this check.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20220220151527.17216-4-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andy Shevchenko 2022-02-20 15:15:17 +00:00 committed by Greg Kroah-Hartman
parent 5825b2c676
commit 8c751e0d9a
1 changed files with 2 additions and 1 deletions
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3
drivers/nvmem/core.c
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@ -903,7 +903,8 @@ static void nvmem_device_release(struct kref *kref)
*/
void nvmem_unregister(struct nvmem_device *nvmem)
{
kref_put(&nvmem->refcnt, nvmem_device_release);
if (nvmem)
kref_put(&nvmem->refcnt, nvmem_device_release);
}
EXPORT_SYMBOL_GPL(nvmem_unregister);