[Intel-gfx] [dinq] Request to merge in padovan's fence fd fix

[Daniel Vetter]

On Fri, Jan 27, 2017 at 12:36:11PM -0800, Chad Versace wrote:
> Chris just pushed execbuffer fence fds to dinq. Could someone please get the
> below fix from airlied/drm-fixes into dinq? (What's the usual method here?
> Merge drm-fixes -> dinq, cherry-pick drm-fixes -> dinq, rebase?)

For testing, just test using the drm-tip tree, which has everything. For
merging patches that need both, ping the drm-misc/drm-intel maintainers
and we'll orchestrate some backmerge festival. We need that anyway for
other stuff, so should happen this week.

In general, for testing/consumption, running dinq is the wrong thing.
-Daniel

> 
> Thanks
> 
>     commit 7e9081c5aac73b8a0bc22e0b3e7a12c3e9cf5256                                                                      
>     Author: Gustavo Padovan <gustavo.padovan at collabora.com>                                                              
>     Date:   Fri Jan 13 12:22:09 2017 -0200                                                                               
>                                                                                                                          
>         drm/fence: fix memory overwrite when setting out_fence fd                                                        
>                                                                                                                          
>         Currently if the userspace declares a int variable to store the out_fence                                        
>         fd and pass it to OUT_FENCE_PTR the kernel will overwrite the 32 bits                                            
>         above the int variable on 64 bits systems.                                                                       
>                                                                                                                          
>         Fix this by making the internal storage of out_fence in the kernel a s32                                         
>         pointer.                                                                                                         
>                                                                                                                          
>         Reported-by: Chad Versace <chadversary at chromium.org>                                                             
>         Signed-off-by: Gustavo Padovan <gustavo.padovan at collabora.com>                                                   
>         Fixes: beaf5af48034 ("drm/fence: add out-fences support")                                                        
>         Cc: Daniel Vetter <daniel at ffwll.ch>                                                                              
>         Cc: Rafael Antognolli <rafael.antognolli at intel.com>                                                              
>         Cc: Laurent Pinchart <laurent.pinchart at ideasonboard.com>                                                         
>         Acked-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>                                                   
>         Reviewed-and-Tested-by: Chad Versace <chadversary at chromium.org>                                                  
>         Link: http://patchwork.freedesktop.org/patch/msgid/1484317329-9293-1-git-send-email-gustavo@padovan.org          
>     

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch