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Subject[PATCH v6 09/10] drm/qxl: simplify qxl_fence_wait
Date
Now that we have the new release_event wait queue we can just
use that in qxl_fence_wait() and simplify the code alot.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
---
drivers/gpu/drm/qxl/qxl_release.c | 44 +++----------------------------
1 file changed, 4 insertions(+), 40 deletions(-)

diff --git a/drivers/gpu/drm/qxl/qxl_release.c b/drivers/gpu/drm/qxl/qxl_release.c
index 43a5436853b7..6ed673d75f9f 100644
--- a/drivers/gpu/drm/qxl/qxl_release.c
+++ b/drivers/gpu/drm/qxl/qxl_release.c
@@ -58,54 +58,18 @@ static long qxl_fence_wait(struct dma_fence *fence, bool intr,
signed long timeout)
{
struct qxl_device *qdev;
- struct qxl_release *release;
- int count = 0, sc = 0;
- bool have_drawable_releases;
unsigned long cur, end = jiffies + timeout;

qdev = container_of(fence->lock, struct qxl_device, release_lock);
- release = container_of(fence, struct qxl_release, base);
- have_drawable_releases = release->type == QXL_RELEASE_DRAWABLE;
-
-retry:
- sc++;

if (dma_fence_is_signaled(fence))
goto signaled;

qxl_io_notify_oom(qdev);
-
- for (count = 0; count < 11; count++) {
- if (!qxl_queue_garbage_collect(qdev, true))
- break;
-
- if (dma_fence_is_signaled(fence))
- goto signaled;
- }
-
- if (dma_fence_is_signaled(fence))
- goto signaled;
-
- if (have_drawable_releases || sc < 4) {
- if (sc > 2)
- /* back off */
- usleep_range(500, 1000);
-
- if (time_after(jiffies, end))
- return 0;
-
- if (have_drawable_releases && sc > 300) {
- DMA_FENCE_WARN(fence, "failed to wait on release %llu "
- "after spincount %d\n",
- fence->context & ~0xf0000000, sc);
- goto signaled;
- }
- goto retry;
- }
- /*
- * yeah, original sync_obj_wait gave up after 3 spins when
- * have_drawable_releases is not set.
- */
+ if (!wait_event_timeout(qdev->release_event,
+ dma_fence_is_signaled(fence),
+ timeout))
+ return 0;

signaled:
cur = jiffies;
--
2.29.2
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