linux-kernel - [PATCH v2 21/23] dmaengine: edma: Move the pending error check into helper function

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Message-ID: <1441974442-8233-22-git-send-email-peter.ujfalusi@ti.com>
Date:	Fri, 11 Sep 2015 15:27:20 +0300
From:	Peter Ujfalusi <peter.ujfalusi@...com>
To:	<vinod.koul@...el.com>, <nsekhar@...com>, <linux@....linux.org.uk>
CC:	<olof@...om.net>, <arnd@...db.de>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <linux-omap@...r.kernel.org>,
	<dmaengine@...r.kernel.org>
Subject: [PATCH v2 21/23] dmaengine: edma: Move the pending error check into helper function

In the ccerr interrupt handler the code checks for pending errors in the
error status registers in two different places.
Move the check out to a helper function.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@...com>
---
 drivers/dma/edma.c | 20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c
index a84c8aa87420..7ec4ec3a795a 100644
--- a/drivers/dma/edma.c
+++ b/drivers/dma/edma.c
@@ -1608,6 +1608,16 @@ static void edma_error_handler(struct edma_chan *echan)
 	spin_unlock(&echan->vchan.lock);
 }
 
+static inline bool edma_error_pending(struct edma_cc *ecc)
+{
+	if (edma_read_array(ecc, EDMA_EMR, 0) ||
+	    edma_read_array(ecc, EDMA_EMR, 1) ||
+	    edma_read(ecc, EDMA_QEMR) || edma_read(ecc, EDMA_CCERR))
+		return true;
+
+	return false;
+}
+
 /* eDMA error interrupt handler */
 static irqreturn_t dma_ccerr_handler(int irq, void *data)
 {
@@ -1622,10 +1632,7 @@ static irqreturn_t dma_ccerr_handler(int irq, void *data)
 
 	dev_dbg(ecc->dev, "dma_ccerr_handler\n");
 
-	if ((edma_read_array(ecc, EDMA_EMR, 0) == 0) &&
-	    (edma_read_array(ecc, EDMA_EMR, 1) == 0) &&
-	    (edma_read(ecc, EDMA_QEMR) == 0) &&
-	    (edma_read(ecc, EDMA_CCERR) == 0))
+	if (!edma_error_pending(ecc))
 		return IRQ_NONE;
 
 	while (1) {
@@ -1678,10 +1685,7 @@ static irqreturn_t dma_ccerr_handler(int irq, void *data)
 				}
 			}
 		}
-		if ((edma_read_array(ecc, EDMA_EMR, 0) == 0) &&
-		    (edma_read_array(ecc, EDMA_EMR, 1) == 0) &&
-		    (edma_read(ecc, EDMA_QEMR) == 0) &&
-		    (edma_read(ecc, EDMA_CCERR) == 0))
+		if (!edma_error_pending(ecc))
 			break;
 		cnt++;
 		if (cnt > 10)
-- 
2.5.1

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