Re: [PATCH v3.16 2/2] v4l: event: Add subscription to list before calling "add" operation

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On Thu, Nov 08, 2018 at 02:03:50PM +0200, Sakari Ailus wrote:
> [ upstream commit 92539d3eda2c090b382699bbb896d4b54e9bdece ]
> 
> Patch ad608fbcf166 changed how events were subscribed to address an issue
> elsewhere. As a side effect of that change, the "add" callback was called
> before the event subscription was added to the list of subscribed events,
> causing the first event queued by the add callback (and possibly other
> events arriving soon afterwards) to be lost.
> 
> Fix this by adding the subscription to the list before calling the "add"
> callback, and clean up afterwards if that fails.
> 
> Fixes: ad608fbcf166 ("media: v4l: event: Prevent freeing event subscriptions while accessed")

Now applied, thanks.

greg k-h



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