search for: 707b8aa

...eep(12*1000); + printk("done waiting 12 sec\n"); drm_kms_helper_poll_disable(drm_dev); vga_switcheroo_set_dynamic_switch(pdev, VGA_SWITCHEROO_OFF); nouveau_switcheroo_optimus_dsm(); diff --git a/drivers/gpu/drm/radeon/radeon_drv.c b/drivers/gpu/drm/radeon/radeon_drv.c index 31dd04f..707b8aa 100644 --- a/drivers/gpu/drm/radeon/radeon_drv.c +++ b/drivers/gpu/drm/radeon/radeon_drv.c @@ -413,6 +413,9 @@ static int radeon_pmops_runtime_suspend(struct device *dev) return -EBUSY; } + printk("waiting 12 sec\n"); + msleep(12*1000); + printk("done waiting 12 sec\n");...

Fix a deadlock on hybrid graphics laptops that's been present since 2013: DRM drivers poll connectors in 10 sec intervals. The poll worker is stopped on ->runtime_suspend with cancel_delayed_work_sync(). However the poll worker invokes the DRM drivers' ->detect callbacks, which call pm_runtime_get_sync(). If the poll worker starts after runtime suspend has begun,