Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754209AbbLVNK7 (ORCPT ); Tue, 22 Dec 2015 08:10:59 -0500 Received: from [198.137.200.161] ([198.137.200.161]:44848 "EHLO denmail01.amcc.com" rhost-flags-FAIL-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1752094AbbLVNK4 (ORCPT ); Tue, 22 Dec 2015 08:10:56 -0500 X-Greylist: delayed 1085 seconds by postgrey-1.27 at vger.kernel.org; Tue, 22 Dec 2015 08:10:56 EST From: Rameshwar Prasad Sahu To: vinod.koul@intel.com, dan.j.williams@intel.com Cc: dmaengine@vger.kernel.org, arnd@arndb.de, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, jcm@redhat.com, patches@apm.com, kgondkar@apm.com, Rameshwar Prasad Sahu Subject: [PATCH] dmaengine: xgene-dma: Fix double IRQ issue by setting IRQ_DISABLE_UNLAZY flag Date: Tue, 22 Dec 2015 18:22:06 +0530 Message-Id: <1450788726-19981-1-git-send-email-rsahu@apm.com> X-Mailer: git-send-email 1.7.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1928 Lines: 54 For interrupt controller that doesn't support irq_disable and hardware with level interrupt, an extra interrupt can be pending. This patch fixes the issue by setting IRQ_DISABLE_UNLAZY flag for the interrupt line. Reference: http://git.kernel.org/tip/e9849777d0e27cdd2902805be51da73e7c79578c Signed-off-by: Rameshwar Prasad Sahu --- drivers/dma/xgene-dma.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/drivers/dma/xgene-dma.c b/drivers/dma/xgene-dma.c index 9dfa2b0..6363e84 100644 --- a/drivers/dma/xgene-dma.c +++ b/drivers/dma/xgene-dma.c @@ -29,6 +29,7 @@ #include #include #include +#include #include #include @@ -1610,6 +1611,7 @@ static int xgene_dma_request_irqs(struct xgene_dma *pdma) /* Register DMA channel rx irq */ for (i = 0; i < XGENE_DMA_MAX_CHANNEL; i++) { chan = &pdma->chan[i]; + irq_set_status_flags(chan->rx_irq, IRQ_DISABLE_UNLAZY); ret = devm_request_irq(chan->dev, chan->rx_irq, xgene_dma_chan_ring_isr, 0, chan->name, chan); @@ -1620,6 +1622,7 @@ static int xgene_dma_request_irqs(struct xgene_dma *pdma) for (j = 0; j < i; j++) { chan = &pdma->chan[i]; + irq_clear_status_flags(chan->rx_irq, IRQ_DISABLE_UNLAZY); devm_free_irq(chan->dev, chan->rx_irq, chan); } @@ -1640,6 +1643,7 @@ static void xgene_dma_free_irqs(struct xgene_dma *pdma) for (i = 0; i < XGENE_DMA_MAX_CHANNEL; i++) { chan = &pdma->chan[i]; + irq_clear_status_flags(chan->rx_irq, IRQ_DISABLE_UNLAZY); devm_free_irq(chan->dev, chan->rx_irq, chan); } } -- 1.7.1 -- 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/