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backend/drm: don't free connector immediately

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When a pageflip is pending, we'll get a DRM event for the connector
in the future. We don't want to free the connector immediately
otherwise we'll use-after-free in the pageflip handler.

This commit adds a new state, "DISAPPEARED". This asks the pageflip
handler to destroy the output after it's done pageflipping.
This commit is contained in:
emersion 2018-09-28 10:00:40 +02:00
parent 19f3804548
commit 79dd9ba151
2 changed files with 18 additions and 5 deletions
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4
include/backend/drm/drm.h
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@ -104,10 +104,14 @@ struct wlr_drm_backend {
};
enum wlr_drm_connector_state {
// Connector is available but no output is plugged in
WLR_DRM_CONN_DISCONNECTED,
// An output just has been plugged in and is waiting for a modeset
WLR_DRM_CONN_NEEDS_MODESET,
WLR_DRM_CONN_CLEANUP,
WLR_DRM_CONN_CONNECTED,
// Connector disappeared, waiting for being destroyed on next page-flip
WLR_DRM_CONN_DISAPPEARED,
};
struct wlr_drm_mode {