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[87.176.183.201]) by smtp.gmail.com with ESMTPSA id l28-20020a05600c1d1c00b003942a244ed1sm1462119wms.22.2022.05.04.05.22.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 04 May 2022 05:22:59 -0700 (PDT) From: " =?utf-8?q?Christian_K=C3=B6nig?= " X-Google-Original-From: =?utf-8?q?Christian_K=C3=B6nig?= To: daniel@ffwll.ch, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, linux-media@vger.kernel.org Cc: =?utf-8?q?Christian_K=C3=B6nig?= Subject: [PATCH 3/5] dma-buf: return only unsignaled fences in dma_fence_unwrap_for_each Date: Wed, 4 May 2022 14:22:54 +0200 Message-Id: <20220504122256.1654-3-christian.koenig@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220504122256.1654-1-christian.koenig@amd.com> References: <20220504122256.1654-1-christian.koenig@amd.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org dma_fence_chain containers cleanup signaled fences automatically, so filter those out from arrays as well. Signed-off-by: Christian König --- drivers/dma-buf/dma-fence-unwrap.c | 23 ++++++++++++++++------- include/linux/dma-fence-unwrap.h | 4 ++-- 2 files changed, 18 insertions(+), 9 deletions(-) diff --git a/drivers/dma-buf/dma-fence-unwrap.c b/drivers/dma-buf/dma-fence-unwrap.c index 711be125428c..7b0b91086ded 100644 --- a/drivers/dma-buf/dma-fence-unwrap.c +++ b/drivers/dma-buf/dma-fence-unwrap.c @@ -32,8 +32,13 @@ __dma_fence_unwrap_array(struct dma_fence_unwrap *cursor) struct dma_fence *dma_fence_unwrap_first(struct dma_fence *head, struct dma_fence_unwrap *cursor) { + struct dma_fence *tmp; + cursor->chain = dma_fence_get(head); - return __dma_fence_unwrap_array(cursor); + tmp = __dma_fence_unwrap_array(cursor); + if (tmp && dma_fence_is_signaled(tmp)) + tmp = dma_fence_unwrap_next(cursor); + return tmp; } EXPORT_SYMBOL_GPL(dma_fence_unwrap_first); @@ -48,12 +53,16 @@ struct dma_fence *dma_fence_unwrap_next(struct dma_fence_unwrap *cursor) { struct dma_fence *tmp; - ++cursor->index; - tmp = dma_fence_array_next(cursor->array, cursor->index); - if (tmp) - return tmp; + do { + ++cursor->index; + tmp = dma_fence_array_next(cursor->array, cursor->index); + if (tmp && !dma_fence_is_signaled(tmp)) + return tmp; + + cursor->chain = dma_fence_chain_walk(cursor->chain); + tmp = __dma_fence_unwrap_array(cursor); + } while (tmp && dma_fence_is_signaled(tmp)); - cursor->chain = dma_fence_chain_walk(cursor->chain); - return __dma_fence_unwrap_array(cursor); + return tmp; } EXPORT_SYMBOL_GPL(dma_fence_unwrap_next); diff --git a/include/linux/dma-fence-unwrap.h b/include/linux/dma-fence-unwrap.h index e7c219da4ed7..e9d114637294 100644 --- a/include/linux/dma-fence-unwrap.h +++ b/include/linux/dma-fence-unwrap.h @@ -41,8 +41,8 @@ struct dma_fence *dma_fence_unwrap_next(struct dma_fence_unwrap *cursor); * @head: starting point for the iterator * * Unwrap dma_fence_chain and dma_fence_array containers and deep dive into all - * potential fences in them. If @head is just a normal fence only that one is - * returned. + * potential none signaled fences in them. If @head is just a normal fence only + * that one is returned. */ #define dma_fence_unwrap_for_each(fence, cursor, head) \ for (fence = dma_fence_unwrap_first(head, cursor); fence; \