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| author | Rameshwar Prasad Sahu <rsahu@apm.com> | 2015-12-23 13:58:15 +0100 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2016-01-07 06:39:36 +0100 |
| commit | b0b79024627fcbd4b4531f4e2bc8e133c8fb6a95 (patch) | |
| tree | 5d0c5b0c4f877966a13e65363e595aba85949c0a /drivers/dma/xgene-dma.c | |
| parent | async_tx: use GFP_NOWAIT rather than GFP_IO (diff) | |
| download | linux-b0b79024627fcbd4b4531f4e2bc8e133c8fb6a95.tar.xz linux-b0b79024627fcbd4b4531f4e2bc8e133c8fb6a95.zip | |
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>
Diffstat (limited to '')
| -rw-r--r-- | 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 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); } } |