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PM / Domains: Fix potential NULL pointer dereference

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In the function of_genpd_get_from_provider(), we never check to see if
the argument 'genpdspec' is NULL before dereferencing it. Add error
checking to handle any NULL pointers.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Jon Hunter 2016-03-04 10:55:15 +00:00 committed by Rafael J. Wysocki
parent beda5fc1ff
commit 41795a8a3c
1 changed files with 3 additions and 0 deletions
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drivers/base/power/domain.c
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@ -1702,6 +1702,9 @@ struct generic_pm_domain *of_genpd_get_from_provider(
struct generic_pm_domain *genpd = ERR_PTR(-ENOENT);
struct of_genpd_provider *provider;
if (!genpdspec)
return ERR_PTR(-EINVAL);
mutex_lock(&of_genpd_mutex);
/* Check if we have such a provider in our array */