Re: [PATCH 0/6] driver core: Fix some issues related to device links

From: Russell King - ARM Linux admin
Date: Thu Jan 24 2019 - 09:58:47 EST

On Thu, Jan 24, 2019 at 12:13:06PM +0100, Rafael J. Wysocki wrote:
> Hi Greg at al,
> Recently I have been looking at the device links code because of the
> recent discussion on possibly using them in the DRM subsystem (see for
> example and I have
> found a few issues in that code which should be addressed by this patch
> series. Please refer to the patch changelogs for details.
> None of the problems addressed here should be manifesting themselves in
> mainline kernel today, but if there are more device links users in the
> future, they most likely will be encountered sooner or later. Also they
> need to be fixed for the DRM use case to be supported IMO.
> This series does not fix all issues in device links that have become
> apparent (generally speaking, the idea of returning an existing link
> in case there is one already for the given consumer-supplier pair
> doesn't play well with stateful links and their flags), so there will
> be a follow-up series of patches to clean that up. Still, I don't see
> a reason to sit on these fixes while working on the other patches, so
> here they go.

Hi Rafael,

I've just given these a quick boot, unbind and rebind test with my
DRM case, and nothing seems to have regressed on the face of it.

Tested-by: Russell King <rmk+kernel@xxxxxxxxxxxxxxx>


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