• Dave Airlie's avatar
    drm: fix race between driver loading and userspace open. · b64c115e
    Dave Airlie authored
    Not 100% sure this is due to BKL removal, its most likely a combination
    of that + userspace timing changes in udev/plymouth. The drm adds the sysfs
    device before the driver has completed internal loading, this causes udev
    to make the node and plymouth to open it before we've completed loading.
    
    The proper solution is to delay the sysfs manipulation until later in loading
    however this causes knock on issues with sysfs connector nodes, so we can use
    the global mutex to serialise loading and userspace opens.
    
    Reported-by: Toni Spets (hifi on #radeon)
    Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
    b64c115e
drm_platform.c 3.49 KB