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allocator: only use DRM auth if we are master

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Legacy DRM auth will only work if we are DRM master. Keep using an
unauthenticated DRM FD if we are not DRM master. This should be
enough for GBM.

Closes: https://gitlab.freedesktop.org/wlroots/wlroots/-/issues/3674
This commit is contained in:
Simon Ser 2023-06-19 11:43:04 +02:00 committed by Alexander Orzechowski
parent e8887f76ed
commit be73da28b2
1 changed files with 5 additions and 5 deletions
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10
render/allocator/allocator.c
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@ -69,11 +69,11 @@ static int reopen_drm_node(int drm_fd, bool allow_render_node) {
free(name);
// If we're using a DRM primary node (e.g. because we're running under the
// DRM backend, or because we're on split render/display machine), we need
// to use the legacy DRM authentication mechanism to have the permission to
// manipulate buffers.
if (drmGetNodeTypeFromFd(new_fd) == DRM_NODE_PRIMARY) {
// If we're using a DRM primary node and we are DRM master (e.g. because
// we're running under the DRM backend), we need to use the legacy DRM
// authentication mechanism to have the permission to manipulate DRM dumb
// buffers.
if (drmIsMaster(drm_fd) && drmGetNodeTypeFromFd(new_fd) == DRM_NODE_PRIMARY) {
drm_magic_t magic;
if (drmGetMagic(new_fd, &magic) < 0) {
wlr_log_errno(WLR_ERROR, "drmGetMagic failed");