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authorRameshwar Prasad Sahu <rsahu@apm.com>2015-12-23 18:28:15 +0530
committerVinod Koul <vinod.koul@intel.com>2016-01-07 11:09:36 +0530
commitb0b79024627fcbd4b4531f4e2bc8e133c8fb6a95 (patch)
tree5d0c5b0c4f877966a13e65363e595aba85949c0a
parentb02bab6b0f928d49dbfb03e1e4e9dd43647623d7 (diff)
downloadleg-kernel-b0b79024627fcbd4b4531f4e2bc8e133c8fb6a95.tar.gz
dmaengine: xgene-dma: Fix double IRQ issue by setting IRQ_DISABLE_UNLAZY flag
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 <rsahu@apm.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
-rw-r--r--drivers/dma/xgene-dma.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/dma/xgene-dma.c b/drivers/dma/xgene-dma.c
index 9dfa2b0fa5da..9cb93c5b655d 100644
--- a/drivers/dma/xgene-dma.c
+++ b/drivers/dma/xgene-dma.c
@@ -29,6 +29,7 @@
#include <linux/dmapool.h>
#include <linux/interrupt.h>
#include <linux/io.h>
+#include <linux/irq.h>
#include <linux/module.h>
#include <linux/of_device.h>
@@ -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);
}
}