ACK: [SRU][B][PATCH 0/3] qxl: hook monitors_config updates into crtc, not encoder.

[Stefan Bader]

On 15.12.20 14:48, Dariusz Gadomski wrote:
> BugLink: https://bugs.launchpad.net/bugs/1908219
> 
> [Impact]
> * Ubuntu 18.04 used as a guest in KVM with Spice/QXL in use may lead to a DRM
> error displayed during xorg launch:
> [drm:qxl_enc_commit [qxl]] *ERROR* head number too large or missing monitors
> config:         (ptrval), 0
> 
> [Fix]
> * 00e5d217fa19bcbec13135898e1b9ca2c1c3e89b qxl: hook monitors_config updates
> into crtc, not encoder.
> 
> [Test Case]
> * Set up Ubuntu 18.04 desktop guest with 4.15-series kernel with Spice/QXL in
> KVM. This is known to be reproducible on Ubuntu 20.04 and Centos 7.8 hosts.
> * Boot the 18.04 guest and check kern.log/dmesg for the error.
> 
> Gerd Hoffmann (3):
>   qxl: remove qxl_io_log()
>   qxl: move qxl_send_monitors_config()
>   qxl: hook monitors_config updates into crtc, not encoder.
> 
>  drivers/gpu/drm/qxl/qxl_cmd.c     |  36 +----
>  drivers/gpu/drm/qxl/qxl_display.c | 226 ++++++++++++------------------
>  drivers/gpu/drm/qxl/qxl_drv.h     |   3 -
>  drivers/gpu/drm/qxl/qxl_fb.c      |   2 -
>  drivers/gpu/drm/qxl/qxl_irq.c     |   3 +-
>  5 files changed, 94 insertions(+), 176 deletions(-)
> 
Acked-by: Stefan Bader <stefan.bader at canonical.com>

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