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Antonio Borneo c90fccc256 backend-drm: fix race during system suspend ... Depending on system loading, weston-launcher could drop the drm master access before the compositor and all the clients receive the notification. In this case, some commit could be sent to the drm driver too late and get refused with error EACCES. This error condition is not properly managed and causes weston to hang. Change the return type of start_repaint_loop() and repaint_flush() from void to int, and return 0 on success or -1 if the repaint has to be cancelled. In the callers of start_repaint_loop() and repaint_flush() handle the return value and cancel the repaint when needed. In backend-drm detect the error EACCES and return -1. Note: to keep the code cleaner, this change inverts the execution order between weston_output_schedule_repaint_reset() and repaint_cancel(). No need to wait for suspend or for any notification; in case the weston reschedules a repaint, it will get EACCES again. At resume, damage-all guarantees a complete repaint. This fix is for atomic modeset only. Legacy modeset suffers from similar problems, but it is not fixed by this change. Since drm_pending_state_apply() never returns error for legacy modeset, this change has no impact on legacy modeset. Signed-off-by: Antonio Borneo <antonio.borneo@st.com> Fixes: https://gitlab.freedesktop.org/wayland/weston/issues/117		5 years ago
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backend-drm.h	Rename plugin-registry.h to libweston/plugin-registry.h	6 years ago
backend-fbdev.h	Rename public backend headers	6 years ago
backend-headless.h	Rename public backend headers	6 years ago
backend-rdp.h	backend-rdp: allow to force compression off	6 years ago
backend-wayland.h	Rename public backend headers	6 years ago
backend-x11.h	Rename public backend headers	6 years ago
config-parser.h	Rename config-parser.h to libweston/config-parser.h	6 years ago
libweston.h	backend-drm: fix race during system suspend	5 years ago
matrix.h	Rename matrix.h to libweston/matrix.h	6 years ago
meson.build	include: Install weston-debug header	6 years ago
plugin-registry.h	Rename plugin-registry.h to libweston/plugin-registry.h	6 years ago
timeline-object.h	Rename timeline-object.h to libweston/timeline-object.h	6 years ago
version.h.in	Rename version.h to libweston/version.h	6 years ago
weston-debug.h	libweston: Add weston-debug header to libweston	6 years ago
windowed-output-api.h	Rename windowed-output-api.h to libweston/windowed-output-api.h	6 years ago
xwayland-api.h	Rename xwayland-api.h to libweston/xwayland-api.h	6 years ago
zalloc.h	Rename zalloc.h to libweston/zalloc.h	6 years ago