X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=kernel%2Fdrivers%2Fdma%2Fsh%2Frcar-dmac.c;h=7820d07e7beea7dd0e4a93f12fd9c3ea99ef2bf8;hb=e09b41010ba33a20a87472ee821fa407a5b8da36;hp=a18d16cc479559e2ca7719eebe8755c7a64d242b;hpb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;p=kvmfornfv.git

diff --git a/kernel/drivers/dma/sh/rcar-dmac.c b/kernel/drivers/dma/sh/rcar-dmac.c
index a18d16cc4..7820d07e7 100644
--- a/kernel/drivers/dma/sh/rcar-dmac.c
+++ b/kernel/drivers/dma/sh/rcar-dmac.c
@@ -183,7 +183,7 @@ struct rcar_dmac {
 	unsigned int n_channels;
 	struct rcar_dmac_chan *channels;
 
-	unsigned long modules[256 / BITS_PER_LONG];
+	DECLARE_BITMAP(modules, 256);
 };
 
 #define to_rcar_dmac(d)		container_of(d, struct rcar_dmac, engine)
@@ -465,6 +465,7 @@ static dma_cookie_t rcar_dmac_tx_submit(struct dma_async_tx_descriptor *tx)
 static int rcar_dmac_desc_alloc(struct rcar_dmac_chan *chan, gfp_t gfp)
 {
 	struct rcar_dmac_desc_page *page;
+	unsigned long flags;
 	LIST_HEAD(list);
 	unsigned int i;
 
@@ -482,10 +483,10 @@ static int rcar_dmac_desc_alloc(struct rcar_dmac_chan *chan, gfp_t gfp)
 		list_add_tail(&desc->node, &list);
 	}
 
-	spin_lock_irq(&chan->lock);
+	spin_lock_irqsave(&chan->lock, flags);
 	list_splice_tail(&list, &chan->desc.free);
 	list_add_tail(&page->node, &chan->desc.pages);
-	spin_unlock_irq(&chan->lock);
+	spin_unlock_irqrestore(&chan->lock, flags);
 
 	return 0;
 }
@@ -516,6 +517,7 @@ static void rcar_dmac_desc_put(struct rcar_dmac_chan *chan,
 static void rcar_dmac_desc_recycle_acked(struct rcar_dmac_chan *chan)
 {
 	struct rcar_dmac_desc *desc, *_desc;
+	unsigned long flags;
 	LIST_HEAD(list);
 
 	/*
@@ -524,9 +526,9 @@ static void rcar_dmac_desc_recycle_acked(struct rcar_dmac_chan *chan)
 	 * list_for_each_entry_safe, isn't safe if we release the channel lock
 	 * around the rcar_dmac_desc_put() call.
 	 */
-	spin_lock_irq(&chan->lock);
+	spin_lock_irqsave(&chan->lock, flags);
 	list_splice_init(&chan->desc.wait, &list);
-	spin_unlock_irq(&chan->lock);
+	spin_unlock_irqrestore(&chan->lock, flags);
 
 	list_for_each_entry_safe(desc, _desc, &list, node) {
 		if (async_tx_test_ack(&desc->async_tx)) {
@@ -539,9 +541,9 @@ static void rcar_dmac_desc_recycle_acked(struct rcar_dmac_chan *chan)
 		return;
 
 	/* Put the remaining descriptors back in the wait list. */
-	spin_lock_irq(&chan->lock);
+	spin_lock_irqsave(&chan->lock, flags);
 	list_splice(&list, &chan->desc.wait);
-	spin_unlock_irq(&chan->lock);
+	spin_unlock_irqrestore(&chan->lock, flags);
 }
 
 /*
@@ -556,12 +558,13 @@ static void rcar_dmac_desc_recycle_acked(struct rcar_dmac_chan *chan)
 static struct rcar_dmac_desc *rcar_dmac_desc_get(struct rcar_dmac_chan *chan)
 {
 	struct rcar_dmac_desc *desc;
+	unsigned long flags;
 	int ret;
 
 	/* Recycle acked descriptors before attempting allocation. */
 	rcar_dmac_desc_recycle_acked(chan);
 
-	spin_lock_irq(&chan->lock);
+	spin_lock_irqsave(&chan->lock, flags);
 
 	while (list_empty(&chan->desc.free)) {
 		/*
@@ -570,17 +573,17 @@ static struct rcar_dmac_desc *rcar_dmac_desc_get(struct rcar_dmac_chan *chan)
 		 * allocated descriptors. If the allocation fails return an
 		 * error.
 		 */
-		spin_unlock_irq(&chan->lock);
+		spin_unlock_irqrestore(&chan->lock, flags);
 		ret = rcar_dmac_desc_alloc(chan, GFP_NOWAIT);
 		if (ret < 0)
 			return NULL;
-		spin_lock_irq(&chan->lock);
+		spin_lock_irqsave(&chan->lock, flags);
 	}
 
 	desc = list_first_entry(&chan->desc.free, struct rcar_dmac_desc, node);
 	list_del(&desc->node);
 
-	spin_unlock_irq(&chan->lock);
+	spin_unlock_irqrestore(&chan->lock, flags);
 
 	return desc;
 }
@@ -593,6 +596,7 @@ static struct rcar_dmac_desc *rcar_dmac_desc_get(struct rcar_dmac_chan *chan)
 static int rcar_dmac_xfer_chunk_alloc(struct rcar_dmac_chan *chan, gfp_t gfp)
 {
 	struct rcar_dmac_desc_page *page;
+	unsigned long flags;
 	LIST_HEAD(list);
 	unsigned int i;
 
@@ -606,10 +610,10 @@ static int rcar_dmac_xfer_chunk_alloc(struct rcar_dmac_chan *chan, gfp_t gfp)
 		list_add_tail(&chunk->node, &list);
 	}
 
-	spin_lock_irq(&chan->lock);
+	spin_lock_irqsave(&chan->lock, flags);
 	list_splice_tail(&list, &chan->desc.chunks_free);
 	list_add_tail(&page->node, &chan->desc.pages);
-	spin_unlock_irq(&chan->lock);
+	spin_unlock_irqrestore(&chan->lock, flags);
 
 	return 0;
 }
@@ -627,9 +631,10 @@ static struct rcar_dmac_xfer_chunk *
 rcar_dmac_xfer_chunk_get(struct rcar_dmac_chan *chan)
 {
 	struct rcar_dmac_xfer_chunk *chunk;
+	unsigned long flags;
 	int ret;
 
-	spin_lock_irq(&chan->lock);
+	spin_lock_irqsave(&chan->lock, flags);
 
 	while (list_empty(&chan->desc.chunks_free)) {
 		/*
@@ -638,18 +643,18 @@ rcar_dmac_xfer_chunk_get(struct rcar_dmac_chan *chan)
 		 * allocated descriptors. If the allocation fails return an
 		 * error.
 		 */
-		spin_unlock_irq(&chan->lock);
+		spin_unlock_irqrestore(&chan->lock, flags);
 		ret = rcar_dmac_xfer_chunk_alloc(chan, GFP_NOWAIT);
 		if (ret < 0)
 			return NULL;
-		spin_lock_irq(&chan->lock);
+		spin_lock_irqsave(&chan->lock, flags);
 	}
 
 	chunk = list_first_entry(&chan->desc.chunks_free,
 				 struct rcar_dmac_xfer_chunk, node);
 	list_del(&chunk->node);
 
-	spin_unlock_irq(&chan->lock);
+	spin_unlock_irqrestore(&chan->lock, flags);
 
 	return chunk;
 }