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drm/amdgpu: fix signed overrun in amdgpu_ctx_get_fence

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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>
This commit is contained in:
Christian König
2015-07-18 19:20:05 +02:00
committed by Alex Deucher
parent cdecb65b4e
commit cf6f1d3949
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
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@@ -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;
}