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From: Rob Clark <robdclark@gmail.com>
To: dri-devel@lists.freedesktop.org
Cc: Rob Clark <robdclark@chromium.org>,
	David Airlie <airlied@linux.ie>,
	linux-arm-msm@vger.kernel.org,
	Abhinav Kumar <quic_abhinavk@quicinc.com>,
	open list <linux-kernel@vger.kernel.org>,
	Sean Paul <sean@poorly.run>,
	freedreno@lists.freedesktop.org
Subject: [PATCH] drm/msm/gpu: Don't allow zero fence_id
Date: Mon, 29 Nov 2021 10:23:44 -0800	[thread overview]
Message-ID: <20211129182344.292609-1-robdclark@gmail.com> (raw)

From: Rob Clark <robdclark@chromium.org>

Elsewhere we treat zero as "no fence" and __msm_gem_submit_destroy()
skips removal from fence_idr.  We could alternately change this to use
negative values for "no fence" but I think it is more clear to not allow
zero as a valid fence_id.

Signed-off-by: Rob Clark <robdclark@chromium.org>
---
 drivers/gpu/drm/msm/msm_gem_submit.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/msm_gem_submit.c b/drivers/gpu/drm/msm/msm_gem_submit.c
index 282628d6b72c..6cfa984dee6a 100644
--- a/drivers/gpu/drm/msm/msm_gem_submit.c
+++ b/drivers/gpu/drm/msm/msm_gem_submit.c
@@ -881,7 +881,7 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
 	 * to the underlying fence.
 	 */
 	submit->fence_id = idr_alloc_cyclic(&queue->fence_idr,
-			submit->user_fence, 0, INT_MAX, GFP_KERNEL);
+			submit->user_fence, 1, INT_MAX, GFP_KERNEL);
 	if (submit->fence_id < 0) {
 		ret = submit->fence_id = 0;
 		submit->fence_id = 0;
-- 
2.33.1


WARNING: multiple messages have this Message-ID (diff)
From: Rob Clark <robdclark@gmail.com>
To: dri-devel@lists.freedesktop.org
Cc: freedreno@lists.freedesktop.org, linux-arm-msm@vger.kernel.org,
	Rob Clark <robdclark@chromium.org>,
	Rob Clark <robdclark@gmail.com>, Sean Paul <sean@poorly.run>,
	Abhinav Kumar <quic_abhinavk@quicinc.com>,
	David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
	linux-kernel@vger.kernel.org (open list)
Subject: [PATCH] drm/msm/gpu: Don't allow zero fence_id
Date: Mon, 29 Nov 2021 10:23:44 -0800	[thread overview]
Message-ID: <20211129182344.292609-1-robdclark@gmail.com> (raw)

From: Rob Clark <robdclark@chromium.org>

Elsewhere we treat zero as "no fence" and __msm_gem_submit_destroy()
skips removal from fence_idr.  We could alternately change this to use
negative values for "no fence" but I think it is more clear to not allow
zero as a valid fence_id.

Signed-off-by: Rob Clark <robdclark@chromium.org>
---
 drivers/gpu/drm/msm/msm_gem_submit.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/msm_gem_submit.c b/drivers/gpu/drm/msm/msm_gem_submit.c
index 282628d6b72c..6cfa984dee6a 100644
--- a/drivers/gpu/drm/msm/msm_gem_submit.c
+++ b/drivers/gpu/drm/msm/msm_gem_submit.c
@@ -881,7 +881,7 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
 	 * to the underlying fence.
 	 */
 	submit->fence_id = idr_alloc_cyclic(&queue->fence_idr,
-			submit->user_fence, 0, INT_MAX, GFP_KERNEL);
+			submit->user_fence, 1, INT_MAX, GFP_KERNEL);
 	if (submit->fence_id < 0) {
 		ret = submit->fence_id = 0;
 		submit->fence_id = 0;
-- 
2.33.1


             reply	other threads:[~2021-11-29 18:18 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-29 18:23 Rob Clark [this message]
2021-11-29 18:23 ` [PATCH] drm/msm/gpu: Don't allow zero fence_id Rob Clark
2021-11-29 21:02 ` Rob Clark
2021-11-29 21:02   ` Rob Clark

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