mirror of
git://nv-tegra.nvidia.com/linux-nvgpu.git
synced 2025-12-24 10:34:43 +03:00
274e1881af
Allow SW to force a semaphore release. Typically SW waits for a semaphore to reach the value right before the semaphore release value before doing a release. For example, assuming a semaphore is to be released by SW by writing a 10 into the semaphore, the code waits for the semaphore to get to 9 before writing 10. The problem with this happens when trying to shutdown the GPU unexpectedly. When aborting a channel after the GPU has terminated the GPU is potantially no longer processing anything. If a SW semaphore release is waiting on the semaphore to reach N-1 before writing N to the semaphore N-1 may never get written by the GPU. This obviously causes a hang in the SW shutdown. The solution is to let SW force a semaphore release in the channel_abort case. Bug 1816516 Bug 1807277 Change-Id: Ib8b4afd86102eacf372362b1748fb6ca04e6fa66 Signed-off-by: Alex Waterman <alexw@nvidia.com> Reviewed-on: http://git-master/r/1250021 (cherry picked from commit 2e9fa40902d2c4d5a1febe0bf2db420ce14bc633) Reviewed-on: http://git-master/r/1261915 Reviewed-by: Automatic_Commit_Validation_User GVS: Gerrit_Virtual_Submit Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>