On Sun, Feb 11, 2018 at 10:38:28AM +0100, Lukas Wunner wrote:
> Introduce a helper to retrieve the current task's work struct if it is
> a workqueue worker.
> This allows us to fix a long-standing deadlock in several DRM drivers
> wherein the ->runtime_suspend callback waits for a specific worker to
> finish and that worker in turn calls a function which waits for runtime
> suspend to finish. That function is invoked from multiple call sites
> and waiting for runtime suspend to finish is the correct thing to do
> except if it's executing in the context of the worker.
> Cc: Tejun Heo <t...@kernel.org>
> Cc: Lai Jiangshan <jiangshan...@gmail.com>
> Cc: Dave Airlie <airl...@redhat.com>
> Cc: Ben Skeggs <bske...@redhat.com>
> Cc: Alex Deucher <alexander.deuc...@amd.com>
> Signed-off-by: Lukas Wunner <lu...@wunner.de>
I wonder whether it's too generic a name but there are other functions
named in a similar fashion and AFAICS current_work isn't used by
anyone in the tree, so it seems okay.
Acked-by: Tejun Heo <t...@kernel.org>
Please feel free to route as you see fit.