From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755784AbdKNOg1 (ORCPT ); Tue, 14 Nov 2017 09:36:27 -0500 Received: from lelnx194.ext.ti.com ([198.47.27.80]:17819 "EHLO lelnx194.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755537AbdKNOcP (ORCPT ); Tue, 14 Nov 2017 09:32:15 -0500 From: Peter Ujfalusi To: CC: , , , Subject: [PATCH 01/10] dmaengine: virt-dma: Add helper to free/reuse a descriptor Date: Tue, 14 Nov 2017 16:32:03 +0200 Message-ID: <20171114143212.8311-2-peter.ujfalusi@ti.com> X-Mailer: git-send-email 2.15.0 In-Reply-To: <20171114143212.8311-1-peter.ujfalusi@ti.com> References: <20171114143212.8311-1-peter.ujfalusi@ti.com> MIME-Version: 1.0 Content-Type: text/plain X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The vchan_vdesc_fini() can be used to free or reuse a given descriptor after it has been marked as completed. Signed-off-by: Peter Ujfalusi --- drivers/dma/virt-dma.c | 5 +---- drivers/dma/virt-dma.h | 14 ++++++++++++++ 2 files changed, 15 insertions(+), 4 deletions(-) diff --git a/drivers/dma/virt-dma.c b/drivers/dma/virt-dma.c index 545e97279083..88ad8ed2a8d6 100644 --- a/drivers/dma/virt-dma.c +++ b/drivers/dma/virt-dma.c @@ -107,10 +107,7 @@ static void vchan_complete(unsigned long arg) dmaengine_desc_get_callback(&vd->tx, &cb); list_del(&vd->node); - if (dmaengine_desc_test_reuse(&vd->tx)) - list_add(&vd->node, &vc->desc_allocated); - else - vc->desc_free(vd); + vchan_vdesc_fini(vd); dmaengine_desc_callback_invoke(&cb, NULL); } diff --git a/drivers/dma/virt-dma.h b/drivers/dma/virt-dma.h index 3f776a46a29c..2edb05505102 100644 --- a/drivers/dma/virt-dma.h +++ b/drivers/dma/virt-dma.h @@ -103,6 +103,20 @@ static inline void vchan_cookie_complete(struct virt_dma_desc *vd) tasklet_schedule(&vc->task); } +/** + * vchan_vdesc_fini - Free or reuse a descriptor + * @vd: virtual descriptor to free/reuse + */ +static inline void vchan_vdesc_fini(struct virt_dma_desc *vd) +{ + struct virt_dma_chan *vc = to_virt_chan(vd->tx.chan); + + if (dmaengine_desc_test_reuse(&vd->tx)) + list_add(&vd->node, &vc->desc_allocated); + else + vc->desc_free(vd); +} + /** * vchan_cyclic_callback - report the completion of a period * @vd: virtual descriptor -- Peter Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki