Sang-Hun Lee ebf991e990 gpu: nvgpu: flush write before unlocking ...

- gk20a_enable is reading the clock after unlocking the spinlock
   to flush any previous write
 - This could lead to a race if any write afterwards assume
   the write has been completed already
 - Read the clock before unlocking to ensure all previous writes
   have been completed before letting any other thread use gk20a

Bug 200007520

Change-Id: I737fbbe825c68b25ca256c4a8ee2b99aa8baf0f5
Signed-off-by: Sang-Hun Lee <sanlee@nvidia.com>
Reviewed-on: http://git-master/r/418485
(cherry picked from commit 2aed542a719caa69620766bf2dceefe50626c189)
Reviewed-on: http://git-master/r/437842
Reviewed-by: Mitch Luban <mluban@nvidia.com>
Tested-by: Mitch Luban <mluban@nvidia.com>

2015-03-18 12:10:33 -07:00

drivers/gpu/nvgpu

gpu: nvgpu: flush write before unlocking

2015-03-18 12:10:33 -07:00

include/trace/events

gpu: nvgpu: Add rail gating trace events

2015-03-18 12:10:06 -07:00

Description

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42 MiB