netdev - [PATCH 1/1] drivers: net: davinci_cpdma: acknowledge interrupt properly

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Date:	Thu, 31 Jan 2013 01:26:53 +0530
From:	Mugunthan V N <mugunthanvnm@...com>
To:	<netdev@...r.kernel.org>
CC:	<davem@...emloft.net>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-omap@...r.kernel.org>, <panto@...oniou-consulting.com>,
	Mugunthan V N <mugunthanvnm@...com>
Subject: [PATCH 1/1] drivers: net: davinci_cpdma: acknowledge interrupt properly

CPDMA interrupts are not properly acknowledged which leads to interrupt
storm, only cpdma interrupt 0 is acknowledged in Davinci CPDMA driver.
Changed cpdma_ctlr_eoi api to acknowledge 1 and 2 interrupts which are
used for rx and tx respectively.

Reported-by: Pantelis Antoniou <panto@...oniou-consulting.com>
Signed-off-by: Mugunthan V N <mugunthanvnm@...com>
---
 drivers/net/ethernet/ti/davinci_cpdma.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/ti/davinci_cpdma.c b/drivers/net/ethernet/ti/davinci_cpdma.c
index f862918..afe14a6 100644
--- a/drivers/net/ethernet/ti/davinci_cpdma.c
+++ b/drivers/net/ethernet/ti/davinci_cpdma.c
@@ -487,6 +487,8 @@ int cpdma_ctlr_int_ctrl(struct cpdma_ctlr *ctlr, bool enable)
 void cpdma_ctlr_eoi(struct cpdma_ctlr *ctlr)
 {
 	dma_reg_write(ctlr, CPDMA_MACEOIVECTOR, 0);
+	dma_reg_write(ctlr, CPDMA_MACEOIVECTOR, 1);
+	dma_reg_write(ctlr, CPDMA_MACEOIVECTOR, 2);
 }
 
 struct cpdma_chan *cpdma_chan_create(struct cpdma_ctlr *ctlr, int chan_num,
-- 
1.7.9.5

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