From cd34db4a526c370fa0ca21b046b3a2636c481f56 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Mon, 29 Aug 2016 08:08:25 +0100 Subject: [PATCH] drm/etnaviv: Remove manual call to reservation_object_test_signaled_rcu before wait Since fence_wait_timeout_reservation_object_wait_timeout_rcu() with a timeout of 0 becomes reservation_object_test_signaled_rcu(), we do not need to handle such conversion in the caller. The only challenge are those callers that wish to differentiate the error code between the nonblocking busy check and potentially blocking wait. Signed-off-by: Chris Wilson Cc: Lucas Stach Cc: Russell King Cc: Christian Gmeiner Reviewed-by: Daniel Vetter Acked-by: Lucas Stach Signed-off-by: Sumit Semwal Link: http://patchwork.freedesktop.org/patch/msgid/20160829070834.22296-2-chris@chris-wilson.co.uk --- drivers/gpu/drm/etnaviv/etnaviv_gem.c | 24 ++++++++++-------------- 1 file changed, 10 insertions(+), 14 deletions(-) diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem.c b/drivers/gpu/drm/etnaviv/etnaviv_gem.c index 5ce3603e6eac..9ffca2478e02 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_gem.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_gem.c @@ -409,20 +409,16 @@ int etnaviv_gem_cpu_prep(struct drm_gem_object *obj, u32 op, struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); struct drm_device *dev = obj->dev; bool write = !!(op & ETNA_PREP_WRITE); - int ret; - - if (op & ETNA_PREP_NOSYNC) { - if (!reservation_object_test_signaled_rcu(etnaviv_obj->resv, - write)) - return -EBUSY; - } else { - unsigned long remain = etnaviv_timeout_to_jiffies(timeout); - - ret = reservation_object_wait_timeout_rcu(etnaviv_obj->resv, - write, true, remain); - if (ret <= 0) - return ret == 0 ? -ETIMEDOUT : ret; - } + unsigned long remain = + op & ETNA_PREP_NOSYNC ? 0 : etnaviv_timeout_to_jiffies(timeout); + long lret; + + lret = reservation_object_wait_timeout_rcu(etnaviv_obj->resv, + write, true, remain); + if (lret < 0) + return lret; + else if (lret == 0) + return remain == 0 ? -EBUSY : -ETIMEDOUT; if (etnaviv_obj->flags & ETNA_BO_CACHED) { if (!etnaviv_obj->sgt) { -- 2.20.1