diff options
author | Nishanth Menon <nm@ti.com> | 2013-01-18 14:52:35 -0500 |
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committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-01-22 07:28:40 -0500 |
commit | 8fa938acb318378463987b04be083dc2467e0480 (patch) | |
tree | 926cebf29f659ce711e87a52572fc4238c1b158b /drivers/acpi | |
parent | bcb27549f4185ca7d0168e201931613706ef2b83 (diff) |
PM / devfreq: exynos4_bus: honor RCU lock usage
OPP pointers cannot be expected to be valid beyond the boundary
of rcu_read_lock and rcu_read_unlock. Unfortunately, the current
exynos4 busfreq driver does not honor the usage constraint and stores
the OPP pointer in struct busfreq_data. This could potentially
become invalid later such as: across devfreq opp change decisions,
resulting in unpredictable behavior.
To fix this, we introduce a busfreq specific busfreq_opp_info
structure which is used to handle OPP information. OPP information
is de-referenced to voltage and frequency pairs as needed into
busfreq_opp_info structure and used as needed.
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi')
0 files changed, 0 insertions, 0 deletions