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authorLinus Torvalds <torvalds@linux-foundation.org>2016-01-08 12:23:00 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2016-01-08 12:23:00 -0800
commit212c7f66ec7d1c4895a0a50dca3237350ed69505 (patch)
tree5c51cd259c11d3d980c3fb46a823682af887b6ca /drivers
parent436950a65d0f0b1a391e3f0dc8e2bcb3e3895f07 (diff)
parentb0b79024627fcbd4b4531f4e2bc8e133c8fb6a95 (diff)
Merge tag 'dmaengine-fix-4.4' of git://git.infradead.org/users/vkoul/slave-dma
Pull dmaengine fixes from Vinod Koul: "Late fixes for 4.4 are three fixes for drivers which include a revert of mic-x100 fix which is causing regression, xgene fix for double IRQ and async_tx fix to use GFP_NOWAIT" * tag 'dmaengine-fix-4.4' of git://git.infradead.org/users/vkoul/slave-dma: dmaengine: xgene-dma: Fix double IRQ issue by setting IRQ_DISABLE_UNLAZY flag async_tx: use GFP_NOWAIT rather than GFP_IO dmaengine: Revert "dmaengine: mic_x100: add missing spin_unlock"
Diffstat (limited to 'drivers')
-rw-r--r--drivers/dma/mic_x100_dma.c15
-rw-r--r--drivers/dma/xgene-dma.c4
2 files changed, 9 insertions, 10 deletions
diff --git a/drivers/dma/mic_x100_dma.c b/drivers/dma/mic_x100_dma.c
index cddfa8dbf4bd..068e920ecb68 100644
--- a/drivers/dma/mic_x100_dma.c
+++ b/drivers/dma/mic_x100_dma.c
@@ -317,7 +317,6 @@ mic_dma_prep_memcpy_lock(struct dma_chan *ch, dma_addr_t dma_dest,
struct mic_dma_chan *mic_ch = to_mic_dma_chan(ch);
struct device *dev = mic_dma_ch_to_device(mic_ch);
int result;
- struct dma_async_tx_descriptor *tx = NULL;
if (!len && !flags)
return NULL;
@@ -325,13 +324,10 @@ mic_dma_prep_memcpy_lock(struct dma_chan *ch, dma_addr_t dma_dest,
spin_lock(&mic_ch->prep_lock);
result = mic_dma_do_dma(mic_ch, flags, dma_src, dma_dest, len);
if (result >= 0)
- tx = allocate_tx(mic_ch);
-
- if (!tx)
- dev_err(dev, "Error enqueueing dma, error=%d\n", result);
-
+ return allocate_tx(mic_ch);
+ dev_err(dev, "Error enqueueing dma, error=%d\n", result);
spin_unlock(&mic_ch->prep_lock);
- return tx;
+ return NULL;
}
static struct dma_async_tx_descriptor *
@@ -339,14 +335,13 @@ mic_dma_prep_interrupt_lock(struct dma_chan *ch, unsigned long flags)
{
struct mic_dma_chan *mic_ch = to_mic_dma_chan(ch);
int ret;
- struct dma_async_tx_descriptor *tx = NULL;
spin_lock(&mic_ch->prep_lock);
ret = mic_dma_do_dma(mic_ch, flags, 0, 0, 0);
if (!ret)
- tx = allocate_tx(mic_ch);
+ return allocate_tx(mic_ch);
spin_unlock(&mic_ch->prep_lock);
- return tx;
+ return NULL;
}
/* Return the status of the transaction */
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);
}
}