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authorSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>2015-06-01 16:36:27 -0700
committerJonathan Cameron <jic23@kernel.org>2015-06-02 22:15:26 +0100
commit1e25aa9641e8f3fa39cd5e46b4afcafd7f12a44b (patch)
tree4607182462e095a8bb77e977859a097555a679d5 /kernel/printk
parente5d732186270e0881f47d95610316c0614b21c3e (diff)
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hid-sensor: Fix suspend/resume delay
By default all the sensors are runtime suspended state (lowest power state). During Linux suspend process, all the run time suspended devices are resumed and then suspended. This caused all sensors to power up and introduced delay in suspend time, when we introduced runtime PM for HID sensors. The opposite process happens during resume process. To fix this, we do powerup process of the sensors only when the request is issued from user (raw or tiggerred). In this way when runtime, resume calls for powerup it will simply return as this will not match user requested state. Note this is a regression fix as the increase in suspend / resume times can be substantial (report of 8 seconds on Len's laptop!) Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Tested-by: Len Brown <len.brown@intel.com> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
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