From f4d41d930e4a876152c705e16cfb461ba18f1e6f Mon Sep 17 00:00:00 2001 From: Maarten Lankhorst Date: Tue, 11 Jul 2017 16:33:06 +0200 Subject: [PATCH] drm/atmel-hlcdc: Handle drm_atomic_helper_swap_state failure drm_atomic_helper_swap_state() will be changed to interruptible waiting in the next few commits, so all drivers have to be changed to handling failure. Atmel tracks pending commits through dc->commit.pending, so it can ignore the changes by setting stall = false. We never return failure in this case, so make failure a BUG_ON. Signed-off-by: Maarten Lankhorst Cc: Boris Brezillon Link: http://patchwork.freedesktop.org/patch/msgid/20170711143314.2148-5-maarten.lankhorst@linux.intel.com Reviewed-by: Sean Paul Signed-off-by: Daniel Vetter --- drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c index 516d9547d331..64f54dc7dd68 100644 --- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c +++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c @@ -539,14 +539,13 @@ static int atmel_hlcdc_dc_atomic_commit(struct drm_device *dev, dc->commit.pending = true; spin_unlock(&dc->commit.wait.lock); - if (ret) { - kfree(commit); - goto error; - } + if (ret) + goto err_free; - /* Swap the state, this is the point of no return. */ - drm_atomic_helper_swap_state(state, true); + /* We have our own synchronization through the commit lock. */ + BUG_ON(drm_atomic_helper_swap_state(state, false) < 0); + /* Swap state succeeded, this is the point of no return. */ drm_atomic_state_get(state); if (async) queue_work(dc->wq, &commit->work); @@ -555,6 +554,8 @@ static int atmel_hlcdc_dc_atomic_commit(struct drm_device *dev, return 0; +err_free: + kfree(commit); error: drm_atomic_helper_cleanup_planes(dev, state); return ret; -- 2.20.1