These changes are the raw update to linux-4.4.6-rt14. Kernel sources

are taken from kernel.org, and rt patch from the rt wiki download page.

During the rebasing, the following patch collided:

Force tick interrupt and get rid of softirq magic(I70131fb85).

Collisions have been removed because its logic was found on the
source already.

Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>

5 files changed, 45 insertions, 35 deletions

diff --git a/kernel/drivers/dma/sh/Kconfig b/kernel/drivers/dma/sh/Kconfig
index 0f371524a..9fda65af8 100644
--- a/kernel/drivers/dma/sh/Kconfig
+++ b/kernel/drivers/dma/sh/Kconfig
@@ -39,18 +39,6 @@ config SH_DMAE_R8A73A4
 
 endif
 
-config SUDMAC
-	tristate "Renesas SUDMAC support"
-	depends on SH_DMAE_BASE
-	help
-	  Enable support for the Renesas SUDMAC controllers.
-
-config RCAR_HPB_DMAE
-	tristate "Renesas R-Car HPB DMAC support"
-	depends on SH_DMAE_BASE
-	help
-	  Enable support for the Renesas R-Car series DMA controllers.
-
 config RCAR_DMAC
 	tristate "Renesas R-Car Gen2 DMA Controller"
 	depends on ARCH_SHMOBILE || COMPILE_TEST
@@ -59,6 +47,12 @@ config RCAR_DMAC
 	  This driver supports the general purpose DMA controller found in the
 	  Renesas R-Car second generation SoCs.
 
+config RCAR_HPB_DMAE
+	tristate "Renesas R-Car HPB DMAC support"
+	depends on SH_DMAE_BASE
+	help
+	  Enable support for the Renesas R-Car series DMA controllers.
+
 config RENESAS_USB_DMAC
 	tristate "Renesas USB-DMA Controller"
 	depends on ARCH_SHMOBILE || COMPILE_TEST
@@ -67,3 +61,9 @@ config RENESAS_USB_DMAC
 	help
 	  This driver supports the USB-DMA controller found in the Renesas
 	  SoCs.
+
+config SUDMAC
+	tristate "Renesas SUDMAC support"
+	depends on SH_DMAE_BASE
+	help
+	  Enable support for the Renesas SUDMAC controllers.
diff --git a/kernel/drivers/dma/sh/Makefile b/kernel/drivers/dma/sh/Makefile
index b8a598066..0133e4658 100644
--- a/kernel/drivers/dma/sh/Makefile
+++ b/kernel/drivers/dma/sh/Makefile
@@ -13,7 +13,7 @@ shdma-$(CONFIG_SH_DMAE_R8A73A4) += shdma-r8a73a4.o
 shdma-objs := $(shdma-y)
 obj-$(CONFIG_SH_DMAE) += shdma.o
 
-obj-$(CONFIG_SUDMAC) += sudmac.o
-obj-$(CONFIG_RCAR_HPB_DMAE) += rcar-hpbdma.o
 obj-$(CONFIG_RCAR_DMAC) += rcar-dmac.o
+obj-$(CONFIG_RCAR_HPB_DMAE) += rcar-hpbdma.o
 obj-$(CONFIG_RENESAS_USB_DMAC) += usb-dmac.o
+obj-$(CONFIG_SUDMAC) += sudmac.o
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;
 }
diff --git a/kernel/drivers/dma/sh/shdma-r8a73a4.c b/kernel/drivers/dma/sh/shdma-r8a73a4.c
index 4fb99970a..96ea3828c 100644
--- a/kernel/drivers/dma/sh/shdma-r8a73a4.c
+++ b/kernel/drivers/dma/sh/shdma-r8a73a4.c
@@ -11,7 +11,7 @@
 
 #include "shdma-arm.h"
 
-const unsigned int dma_ts_shift[] = SH_DMAE_TS_SHIFT;
+static const unsigned int dma_ts_shift[] = SH_DMAE_TS_SHIFT;
 
 static const struct sh_dmae_slave_config dma_slaves[] = {
 	{
diff --git a/kernel/drivers/dma/sh/usb-dmac.c b/kernel/drivers/dma/sh/usb-dmac.c
index ebd8a5f39..f1bcc2a16 100644
--- a/kernel/drivers/dma/sh/usb-dmac.c
+++ b/kernel/drivers/dma/sh/usb-dmac.c
@@ -679,8 +679,11 @@ static int usb_dmac_runtime_suspend(struct device *dev)
 	struct usb_dmac *dmac = dev_get_drvdata(dev);
 	int i;
 
-	for (i = 0; i < dmac->n_channels; ++i)
+	for (i = 0; i < dmac->n_channels; ++i) {
+		if (!dmac->channels[i].iomem)
+			break;
 		usb_dmac_chan_halt(&dmac->channels[i]);
+	}
 
 	return 0;
 }
@@ -799,11 +802,10 @@ static int usb_dmac_probe(struct platform_device *pdev)
 	ret = pm_runtime_get_sync(&pdev->dev);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "runtime PM get sync failed (%d)\n", ret);
-		return ret;
+		goto error_pm;
 	}
 
 	ret = usb_dmac_init(dmac);
-	pm_runtime_put(&pdev->dev);
 
 	if (ret) {
 		dev_err(&pdev->dev, "failed to reset device\n");
@@ -851,10 +853,13 @@ static int usb_dmac_probe(struct platform_device *pdev)
 	if (ret < 0)
 		goto error;
 
+	pm_runtime_put(&pdev->dev);
 	return 0;
 
 error:
 	of_dma_controller_free(pdev->dev.of_node);
+	pm_runtime_put(&pdev->dev);
+error_pm:
 	pm_runtime_disable(&pdev->dev);
 	return ret;
 }