From:   Shunsuke Mie <mie@igel.co.jp>
To:     Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Cc:     Vinod Koul <vkoul@kernel.org>,
        Lorenzo Pieralisi <lpieralisi@kernel.org>,
        =?UTF-8?q?Krzysztof=20Wilczy=C5=84ski?= <kw@linux.com>,
        Manivannan Sadhasivam <mani@kernel.org>,
        Kishon Vijay Abraham I <kishon@kernel.org>,
        Arnd Bergmann <arnd@arndb.de>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Bjorn Helgaas <bhelgaas@google.com>,
        Shunsuke Mie <mie@igel.co.jp>,
        Kunihiko Hayashi <hayashi.kunihiko@socionext.com>,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>,
        Frank Li <Frank.Li@nxp.com>, linux-kernel@vger.kernel.org,
        dmaengine@vger.kernel.org, linux-pci@vger.kernel.org
Subject: [RFC PATCH 11/11] dmaengine: dw-edma: Fix to enable to issue dma request on DMA processing
Date:   Fri, 17 Mar 2023 20:32:38 +0900
Message-Id: <20230317113238.142970-12-mie@igel.co.jp>
In-Reply-To: <20230317113238.142970-1-mie@igel.co.jp>
References: <20230317113238.142970-1-mie@igel.co.jp>
MIME-Version: 1.0
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The issue_pending request is ignored while driver is processing a DMA
request. Fix to issue the pending requests on any dma channel status.

Fixes: e63d79d1ffcd ("dmaengine: Add Synopsys eDMA IP core driver")
Signed-off-by: Shunsuke Mie <mie@igel.co.jp>
---
 drivers/dma/dw-edma/dw-edma-core.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/dma/dw-edma/dw-edma-core.c b/drivers/dma/dw-edma/dw-edma-core.c
index c527af00ff4e..430f9ee0d9e8 100644
--- a/drivers/dma/dw-edma/dw-edma-core.c
+++ b/drivers/dma/dw-edma/dw-edma-core.c
@@ -308,9 +308,12 @@ static void dw_edma_device_issue_pending(struct dma_chan *dchan)
 	struct dw_edma_chan *chan = dchan2dw_edma_chan(dchan);
 	unsigned long flags;
 
+	if (!chan->configured)
+		return;
+
 	spin_lock_irqsave(&chan->vc.lock, flags);
-	if (chan->configured && chan->request == EDMA_REQ_NONE &&
-	    chan->status == EDMA_ST_IDLE && vchan_issue_pending(&chan->vc)) {
+	if (vchan_issue_pending(&chan->vc) && chan->request == EDMA_REQ_NONE &&
+	    chan->status == EDMA_ST_IDLE) {
 		chan->status = EDMA_ST_BUSY;
 		dw_edma_start_transfer(chan);
 	}
-- 
2.25.1