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From cf6f1d39496e9b5dd62953f8dca9f995d80ab4ff Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Christian=20K=C3=B6nig?= <christian.koenig@amd.com>
Date: Sat, 18 Jul 2015 19:20:05 +0200
Subject: [PATCH 0356/1050] drm/amdgpu: fix signed overrun in
amdgpu_ctx_get_fence
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Otherwise the first 16 fences of a context will always signal immediately.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
index 859a484..144edc9 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
@@ -226,7 +226,7 @@ struct fence *amdgpu_ctx_get_fence(struct amdgpu_ctx *ctx,
return ERR_PTR(-EINVAL);
}
- if (seq < cring->sequence - AMDGPU_CTX_MAX_CS_PENDING) {
+ if (seq + AMDGPU_CTX_MAX_CS_PENDING < cring->sequence) {
spin_unlock(&ctx->ring_lock);
return NULL;
}
--
1.9.1
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