Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754663Ab3HEQRW (ORCPT ); Mon, 5 Aug 2013 12:17:22 -0400 Received: from arroyo.ext.ti.com ([192.94.94.40]:39709 "EHLO arroyo.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753253Ab3HEQRT (ORCPT ); Mon, 5 Aug 2013 12:17:19 -0400 From: Joel Fernandes To: Tony Lindgren , Sekhar Nori , Santosh Shilimkar , Sricharan R , Rajendra Nayak , Lokesh Vutla , Matt Porter , Grant Likely , Rob Herring , Vinod Koul , Dan Williams , Mark Brown , Benoit Cousson , Russell King , Arnd Bergmann , Olof Johansson , Balaji TK , Gururaja Hebbar , Chris Ball , Jason Kridner CC: Linux OMAP List , Linux ARM Kernel List , Linux DaVinci Kernel List , Linux Kernel Mailing List , Linux MMC List , Joel Fernandes Subject: [PATCH v3 12/12] dma: edma: Return if nothing left todo in edma_execute Date: Mon, 5 Aug 2013 11:14:57 -0500 Message-ID: <1375719297-12871-13-git-send-email-joelf@ti.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1375719297-12871-1-git-send-email-joelf@ti.com> References: <1375719297-12871-1-git-send-email-joelf@ti.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1066 Lines: 31 It is possible edma_execute is called even when all the SG elements have been submitted for transmission, we add a check for the same and avoid executing the rest of the function. Signed-off-by: Joel Fernandes --- drivers/dma/edma.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c index eca1b47..62987fc 100644 --- a/drivers/dma/edma.c +++ b/drivers/dma/edma.c @@ -168,6 +168,9 @@ static void edma_execute(struct edma_chan *echan) total_left = edesc->pset_nr - edesc->total_processed; total_link_set = total_left > MAX_NR_LS ? MAX_NR_LS : total_left; + if (!total_left) + return; + /* First time, setup 2 cyclically linked sets, each containing half the slots allocated for this channel */ if (edesc->total_processed == 0) { -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/