Merge tag 'dmaengine-4.16-rc1' of git://git.infradead.org/users/vkoul/slave-dma

Pull dmaengine updates from Vinod Koul:
 "This time is smallish update with updates mainly to drivers:

   - updates to xilinx and zynqmp dma controllers

   - update reside calculation for rcar controller

   - more RSTify fixes for documentation

   - add support for race free transfer termination and updating for
     users for that

   - support for new rev of hidma with addition new APIs to get device
     match data in ACPI/OF

   - random updates to bunch of other drivers"

* tag 'dmaengine-4.16-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (47 commits)
  dmaengine: dmatest: fix container_of member in dmatest_callback
  dmaengine: stm32-dmamux: Remove unnecessary platform_get_resource() error check
  dmaengine: sprd: statify 'sprd_dma_prep_dma_memcpy'
  dmaengine: qcom_hidma: simplify DT resource parsing
  dmaengine: xilinx_dma: Free BD consistent memory
  dmaengine: xilinx_dma: Fix warning variable prev set but not used
  dmaengine: xilinx_dma: properly configure the SG mode bit in the driver for cdma
  dmaengine: doc: format struct fields using monospace
  dmaengine: doc: fix bullet list formatting
  dmaengine: ti-dma-crossbar: Fix event mapping for TPCC_EVT_MUX_60_63
  dmaengine: cppi41: Fix channel queues array size check
  dmaengine: imx-sdma: Add MODULE_FIRMWARE
  dmaengine: xilinx_dma: Fix typos
  dmaengine: xilinx_dma: Differentiate probe based on the ip type
  dmaengine: xilinx_dma: fix style issues from checkpatch
  dmaengine: xilinx_dma: Fix kernel doc warnings
  dmaengine: xilinx_dma: Fix race condition in the driver for multiple descriptor scenario
  dmaeninge: xilinx_dma: Fix bug in multiple frame stores scenario in vdma
  dmaengine: xilinx_dma: Check for channel idle state before submitting dma descriptor
  dmaengine: zynqmp_dma: Fix race condition in the probe
  ...

Documentation/devicetree/bindings/dma/qcom_hidma_mgmt.txt

@@ -47,8 +47,8 @@ When the OS is not in control of the management interface (i.e. it's a guest),
 the channel nodes appear on their own, not under a management node.
 
 Required properties:
-- compatible: must contain "qcom,hidma-1.0" for initial HW or "qcom,hidma-1.1"
-for MSI capable HW.
+- compatible: must contain "qcom,hidma-1.0" for initial HW or
+  "qcom,hidma-1.1"/"qcom,hidma-1.2" for MSI capable HW.
 - reg: Addresses for the transfer and event channel
 - interrupts: Should contain the event interrupt
 - desc-count: Number of asynchronous requests this channel can handle

Documentation/driver-api/dmaengine/provider.rst

@@ -111,40 +111,36 @@ The first thing you need to do in your driver is to allocate this
 structure. Any of the usual memory allocators will do, but you'll also
 need to initialize a few fields in there:
 
-- channels: should be initialized as a list using the
+- ``channels``: should be initialized as a list using the
   INIT_LIST_HEAD macro for example
 
-- src_addr_widths:
+- ``src_addr_widths``:
   should contain a bitmask of the supported source transfer width
 
-- dst_addr_widths:
+- ``dst_addr_widths``:
   should contain a bitmask of the supported destination transfer width
 
-- directions:
+- ``directions``:
   should contain a bitmask of the supported slave directions
   (i.e. excluding mem2mem transfers)
 
-- residue_granularity:
+- ``residue_granularity``:
+  granularity of the transfer residue reported to dma_set_residue.
+  This can be either:
 
-  - Granularity of the transfer residue reported to dma_set_residue.
-    This can be either:
+  - Descriptor:
+    your device doesn't support any kind of residue
+    reporting. The framework will only know that a particular
+    transaction descriptor is done.
 
-  - Descriptor
+  - Segment:
+    your device is able to report which chunks have been transferred
 
-    - Your device doesn't support any kind of residue
-      reporting. The framework will only know that a particular
-      transaction descriptor is done.
+  - Burst:
+    your device is able to report which burst have been transferred
 
-      - Segment
-
-        - Your device is able to report which chunks have been transferred
-
-      - Burst
-
-        - Your device is able to report which burst have been transferred
-
-  - dev: should hold the pointer to the ``struct device`` associated
-    to your current driver instance.
+- ``dev``: should hold the pointer to the ``struct device`` associated
+  to your current driver instance.
 
 Supported transaction types
 ---------------------------

drivers/acpi/bus.c

@@ -785,6 +785,24 @@ const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids,
 }
 EXPORT_SYMBOL_GPL(acpi_match_device);
 
+void *acpi_get_match_data(const struct device *dev)
+{
+	const struct acpi_device_id *match;
+
+	if (!dev->driver)
+		return NULL;
+
+	if (!dev->driver->acpi_match_table)
+		return NULL;
+
+	match = acpi_match_device(dev->driver->acpi_match_table, dev);
+	if (!match)
+		return NULL;
+
+	return (void *)match->driver_data;
+}
+EXPORT_SYMBOL_GPL(acpi_get_match_data);
+
 int acpi_match_device_ids(struct acpi_device *device,
 			  const struct acpi_device_id *ids)
 {

drivers/acpi/property.c

@@ -1271,9 +1271,17 @@ static int acpi_fwnode_graph_parse_endpoint(const struct fwnode_handle *fwnode,
 	return 0;
 }
 
+static void *
+acpi_fwnode_device_get_match_data(const struct fwnode_handle *fwnode,
+				  const struct device *dev)
+{
+	return acpi_get_match_data(dev);
+}
+
 #define DECLARE_ACPI_FWNODE_OPS(ops) \
 	const struct fwnode_operations ops = {				\
 		.device_is_available = acpi_fwnode_device_is_available, \
+		.device_get_match_data = acpi_fwnode_device_get_match_data, \
 		.property_present = acpi_fwnode_property_present,	\
 		.property_read_int_array =				\
 			acpi_fwnode_property_read_int_array,		\

drivers/base/property.c

@@ -1340,3 +1340,10 @@ int fwnode_graph_parse_endpoint(const struct fwnode_handle *fwnode,
 	return fwnode_call_int_op(fwnode, graph_parse_endpoint, endpoint);
 }
 EXPORT_SYMBOL(fwnode_graph_parse_endpoint);
+
+void *device_get_match_data(struct device *dev)
+{
+	return fwnode_call_ptr_op(dev_fwnode(dev), device_get_match_data,
+				  dev);
+}
+EXPORT_SYMBOL_GPL(device_get_match_data);

drivers/dma/amba-pl08x.c

@@ -2182,7 +2182,7 @@ static int pl08x_terminate_all(struct dma_chan *chan)
 	}
 	/* Dequeue jobs and free LLIs */
 	if (plchan->at) {
-		pl08x_desc_free(&plchan->at->vd);
+		vchan_terminate_vdesc(&plchan->at->vd);
 		plchan->at = NULL;
 	}
 	/* Dequeue jobs not yet fired as well */
@@ -2193,6 +2193,13 @@ static int pl08x_terminate_all(struct dma_chan *chan)
 	return 0;
 }
 
+static void pl08x_synchronize(struct dma_chan *chan)
+{
+	struct pl08x_dma_chan *plchan = to_pl08x_chan(chan);
+
+	vchan_synchronize(&plchan->vc);
+}
+
 static int pl08x_pause(struct dma_chan *chan)
 {
 	struct pl08x_dma_chan *plchan = to_pl08x_chan(chan);
@@ -2773,6 +2780,7 @@ static int pl08x_probe(struct amba_device *adev, const struct amba_id *id)
 	pl08x->memcpy.device_pause = pl08x_pause;
 	pl08x->memcpy.device_resume = pl08x_resume;
 	pl08x->memcpy.device_terminate_all = pl08x_terminate_all;
+	pl08x->memcpy.device_synchronize = pl08x_synchronize;
 	pl08x->memcpy.src_addr_widths = PL80X_DMA_BUSWIDTHS;
 	pl08x->memcpy.dst_addr_widths = PL80X_DMA_BUSWIDTHS;
 	pl08x->memcpy.directions = BIT(DMA_MEM_TO_MEM);
@@ -2802,6 +2810,7 @@ static int pl08x_probe(struct amba_device *adev, const struct amba_id *id)
 		pl08x->slave.device_pause = pl08x_pause;
 		pl08x->slave.device_resume = pl08x_resume;
 		pl08x->slave.device_terminate_all = pl08x_terminate_all;
+		pl08x->slave.device_synchronize = pl08x_synchronize;
 		pl08x->slave.src_addr_widths = PL80X_DMA_BUSWIDTHS;
 		pl08x->slave.dst_addr_widths = PL80X_DMA_BUSWIDTHS;
 		pl08x->slave.directions =

drivers/dma/bcm2835-dma.c

@@ -812,7 +812,7 @@ static int bcm2835_dma_terminate_all(struct dma_chan *chan)
 	 * c->desc is NULL and exit.)
 	 */
 	if (c->desc) {
-		bcm2835_dma_desc_free(&c->desc->vd);
+		vchan_terminate_vdesc(&c->desc->vd);
 		c->desc = NULL;
 		bcm2835_dma_abort(c->chan_base);
 
@@ -836,6 +836,13 @@ static int bcm2835_dma_terminate_all(struct dma_chan *chan)
 	return 0;
 }
 
+static void bcm2835_dma_synchronize(struct dma_chan *chan)
+{
+	struct bcm2835_chan *c = to_bcm2835_dma_chan(chan);
+
+	vchan_synchronize(&c->vc);
+}
+
 static int bcm2835_dma_chan_init(struct bcm2835_dmadev *d, int chan_id,
 				 int irq, unsigned int irq_flags)
 {
@@ -942,6 +949,7 @@ static int bcm2835_dma_probe(struct platform_device *pdev)
 	od->ddev.device_prep_dma_memcpy = bcm2835_dma_prep_dma_memcpy;
 	od->ddev.device_config = bcm2835_dma_slave_config;
 	od->ddev.device_terminate_all = bcm2835_dma_terminate_all;
+	od->ddev.device_synchronize = bcm2835_dma_synchronize;
 	od->ddev.src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_4_BYTES);
 	od->ddev.dst_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_4_BYTES);
 	od->ddev.directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV) |

drivers/dma/cppi41.c

@@ -934,7 +934,7 @@ static bool cpp41_dma_filter_fn(struct dma_chan *chan, void *param)
 
 	BUILD_BUG_ON(ARRAY_SIZE(am335x_usb_queues_rx) !=
 		     ARRAY_SIZE(am335x_usb_queues_tx));
-	if (WARN_ON(cchan->port_num > ARRAY_SIZE(am335x_usb_queues_rx)))
+	if (WARN_ON(cchan->port_num >= ARRAY_SIZE(am335x_usb_queues_rx)))
 		return false;
 
 	cchan->q_num = queues[cchan->port_num].submit;

drivers/dma/dma-jz4780.c

@@ -511,7 +511,7 @@ static int jz4780_dma_terminate_all(struct dma_chan *chan)
 	/* Clear the DMA status and stop the transfer. */
 	jz4780_dma_writel(jzdma, JZ_DMA_REG_DCS(jzchan->id), 0);
 	if (jzchan->desc) {
-		jz4780_dma_desc_free(&jzchan->desc->vdesc);
+		vchan_terminate_vdesc(&jzchan->desc->vdesc);
 		jzchan->desc = NULL;
 	}
 
@@ -523,6 +523,13 @@ static int jz4780_dma_terminate_all(struct dma_chan *chan)
 	return 0;
 }
 
+static void jz4780_dma_synchronize(struct dma_chan *chan)
+{
+	struct jz4780_dma_chan *jzchan = to_jz4780_dma_chan(chan);
+
+	vchan_synchronize(&jzchan->vchan);
+}
+
 static int jz4780_dma_config(struct dma_chan *chan,
 	struct dma_slave_config *config)
 {
@@ -813,6 +820,7 @@ static int jz4780_dma_probe(struct platform_device *pdev)
 	dd->device_prep_dma_memcpy = jz4780_dma_prep_dma_memcpy;
 	dd->device_config = jz4780_dma_config;
 	dd->device_terminate_all = jz4780_dma_terminate_all;
+	dd->device_synchronize = jz4780_dma_synchronize;
 	dd->device_tx_status = jz4780_dma_tx_status;
 	dd->device_issue_pending = jz4780_dma_issue_pending;
 	dd->src_addr_widths = JZ_DMA_BUSWIDTHS;

drivers/dma/dmatest.c

@@ -355,7 +355,7 @@ static void dmatest_callback(void *arg)
 {
 	struct dmatest_done *done = arg;
 	struct dmatest_thread *thread =
-		container_of(arg, struct dmatest_thread, done_wait);
+		container_of(done, struct dmatest_thread, test_done);
 	if (!thread->done) {
 		done->done = true;
 		wake_up_all(done->wait);

drivers/dma/edma.c

@@ -860,11 +860,8 @@ static int edma_terminate_all(struct dma_chan *chan)
 		/* Move the cyclic channel back to default queue */
 		if (!echan->tc && echan->edesc->cyclic)
 			edma_assign_channel_eventq(echan, EVENTQ_DEFAULT);
-		/*
-		 * free the running request descriptor
-		 * since it is not in any of the vdesc lists
-		 */
-		edma_desc_free(&echan->edesc->vdesc);
+
+		vchan_terminate_vdesc(&echan->edesc->vdesc);
 		echan->edesc = NULL;
 	}
 

drivers/dma/img-mdc-dma.c

@@ -694,7 +694,6 @@ static unsigned int mdc_get_new_events(struct mdc_chan *mchan)
 static int mdc_terminate_all(struct dma_chan *chan)
 {
 	struct mdc_chan *mchan = to_mdc_chan(chan);
-	struct mdc_tx_desc *mdesc;
 	unsigned long flags;
 	LIST_HEAD(head);
 
@@ -703,21 +702,28 @@ static int mdc_terminate_all(struct dma_chan *chan)
 	mdc_chan_writel(mchan, MDC_CONTROL_AND_STATUS_CANCEL,
 			MDC_CONTROL_AND_STATUS);
 
-	mdesc = mchan->desc;
-	mchan->desc = NULL;
+	if (mchan->desc) {
+		vchan_terminate_vdesc(&mchan->desc->vd);
+		mchan->desc = NULL;
+	}
 	vchan_get_all_descriptors(&mchan->vc, &head);
 
 	mdc_get_new_events(mchan);
 
 	spin_unlock_irqrestore(&mchan->vc.lock, flags);
 
-	if (mdesc)
-		mdc_desc_free(&mdesc->vd);
 	vchan_dma_desc_free_list(&mchan->vc, &head);
 
 	return 0;
 }
 
+static void mdc_synchronize(struct dma_chan *chan)
+{
+	struct mdc_chan *mchan = to_mdc_chan(chan);
+
+	vchan_synchronize(&mchan->vc);
+}
+
 static int mdc_slave_config(struct dma_chan *chan,
 			    struct dma_slave_config *config)
 {
@@ -952,6 +958,7 @@ static int mdc_dma_probe(struct platform_device *pdev)
 	mdma->dma_dev.device_tx_status = mdc_tx_status;
 	mdma->dma_dev.device_issue_pending = mdc_issue_pending;
 	mdma->dma_dev.device_terminate_all = mdc_terminate_all;
+	mdma->dma_dev.device_synchronize = mdc_synchronize;
 	mdma->dma_dev.device_config = mdc_slave_config;
 
 	mdma->dma_dev.directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV);

drivers/dma/imx-sdma.c

@@ -1939,4 +1939,10 @@ module_platform_driver(sdma_driver);
 
 MODULE_AUTHOR("Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>");
 MODULE_DESCRIPTION("i.MX SDMA driver");
+#if IS_ENABLED(CONFIG_SOC_IMX6Q)
+MODULE_FIRMWARE("imx/sdma/sdma-imx6q.bin");
+#endif
+#if IS_ENABLED(CONFIG_SOC_IMX7D)
+MODULE_FIRMWARE("imx/sdma/sdma-imx7d.bin");
+#endif
 MODULE_LICENSE("GPL");

drivers/dma/k3dma.c

@@ -719,7 +719,7 @@ static int k3_dma_terminate_all(struct dma_chan *chan)
 		c->phy = NULL;
 		p->vchan = NULL;
 		if (p->ds_run) {
-			k3_dma_free_desc(&p->ds_run->vd);
+			vchan_terminate_vdesc(&p->ds_run->vd);
 			p->ds_run = NULL;
 		}
 		p->ds_done = NULL;
@@ -730,6 +730,13 @@ static int k3_dma_terminate_all(struct dma_chan *chan)
 	return 0;
 }
 
+static void k3_dma_synchronize(struct dma_chan *chan)
+{
+	struct k3_dma_chan *c = to_k3_chan(chan);
+
+	vchan_synchronize(&c->vc);
+}
+
 static int k3_dma_transfer_pause(struct dma_chan *chan)
 {
 	struct k3_dma_chan *c = to_k3_chan(chan);
@@ -868,6 +875,7 @@ static int k3_dma_probe(struct platform_device *op)
 	d->slave.device_pause = k3_dma_transfer_pause;
 	d->slave.device_resume = k3_dma_transfer_resume;
 	d->slave.device_terminate_all = k3_dma_terminate_all;
+	d->slave.device_synchronize = k3_dma_synchronize;
 	d->slave.copy_align = DMAENGINE_ALIGN_8_BYTES;
 
 	/* init virtual channel */

drivers/dma/mic_x100_dma.c

@@ -480,9 +480,7 @@ static int mic_dma_setup_irq(struct mic_dma_chan *ch)
 		to_mbus_hw_ops(ch)->request_threaded_irq(to_mbus_device(ch),
 			mic_dma_intr_handler, mic_dma_thread_fn,
 			"mic dma_channel", ch, ch->ch_num);
-	if (IS_ERR(ch->cookie))
-		return PTR_ERR(ch->cookie);
-	return 0;
+	return PTR_ERR_OR_ZERO(ch->cookie);
 }
 
 static inline void mic_dma_free_irq(struct mic_dma_chan *ch)

drivers/dma/omap-dma.c

@@ -1311,7 +1311,7 @@ static int omap_dma_terminate_all(struct dma_chan *chan)
 	 * c->desc is NULL and exit.)
 	 */
 	if (c->desc) {
-		omap_dma_desc_free(&c->desc->vd);
+		vchan_terminate_vdesc(&c->desc->vd);
 		c->desc = NULL;
 		/* Avoid stopping the dma twice */
 		if (!c->paused)

drivers/dma/qcom/hidma.c

@@ -50,6 +50,7 @@
 #include <linux/slab.h>
 #include <linux/spinlock.h>
 #include <linux/of_dma.h>
+#include <linux/of_device.h>
 #include <linux/property.h>
 #include <linux/delay.h>
 #include <linux/acpi.h>
@@ -104,6 +105,10 @@ static unsigned int nr_desc_prm;
 module_param(nr_desc_prm, uint, 0644);
 MODULE_PARM_DESC(nr_desc_prm, "number of descriptors (default: 0)");
 
+enum hidma_cap {
+	HIDMA_MSI_CAP = 1,
+	HIDMA_IDENTITY_CAP,
+};
 
 /* process completed descriptors */
 static void hidma_process_completed(struct hidma_chan *mchan)
@@ -736,25 +741,12 @@ static int hidma_request_msi(struct hidma_dev *dmadev,
 #endif
 }
 
-static bool hidma_msi_capable(struct device *dev)
+static bool hidma_test_capability(struct device *dev, enum hidma_cap test_cap)
 {
-	struct acpi_device *adev = ACPI_COMPANION(dev);
-	const char *of_compat;
-	int ret = -EINVAL;
+	enum hidma_cap cap;
 
-	if (!adev || acpi_disabled) {
-		ret = device_property_read_string(dev, "compatible",
-						  &of_compat);
-		if (ret)
-			return false;
-
-		ret = strcmp(of_compat, "qcom,hidma-1.1");
-	} else {
-#ifdef CONFIG_ACPI
-		ret = strcmp(acpi_device_hid(adev), "QCOM8062");
-#endif
-	}
-	return ret == 0;
+	cap = (enum hidma_cap) device_get_match_data(dev);
+	return cap ? ((cap & test_cap) > 0) : 0;
 }
 
 static int hidma_probe(struct platform_device *pdev)
@@ -834,8 +826,7 @@ static int hidma_probe(struct platform_device *pdev)
 	 * Determine the MSI capability of the platform. Old HW doesn't
 	 * support MSI.
 	 */
-	msi = hidma_msi_capable(&pdev->dev);
-
+	msi = hidma_test_capability(&pdev->dev, HIDMA_MSI_CAP);
 	device_property_read_u32(&pdev->dev, "desc-count",
 				 &dmadev->nr_descriptors);
 
@@ -848,7 +839,10 @@ static int hidma_probe(struct platform_device *pdev)
 	if (!dmadev->nr_descriptors)
 		dmadev->nr_descriptors = HIDMA_NR_DEFAULT_DESC;
 
-	dmadev->chidx = readl(dmadev->dev_trca + 0x28);
+	if (hidma_test_capability(&pdev->dev, HIDMA_IDENTITY_CAP))
+		dmadev->chidx = readl(dmadev->dev_trca + 0x40);
+	else
+		dmadev->chidx = readl(dmadev->dev_trca + 0x28);
 
 	/* Set DMA mask to 64 bits. */
 	rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
@@ -953,7 +947,8 @@ static int hidma_remove(struct platform_device *pdev)
 #if IS_ENABLED(CONFIG_ACPI)
 static const struct acpi_device_id hidma_acpi_ids[] = {
 	{"QCOM8061"},
-	{"QCOM8062"},
+	{"QCOM8062", HIDMA_MSI_CAP},
+	{"QCOM8063", (HIDMA_MSI_CAP | HIDMA_IDENTITY_CAP)},
 	{},
 };
 MODULE_DEVICE_TABLE(acpi, hidma_acpi_ids);
@@ -961,7 +956,9 @@ MODULE_DEVICE_TABLE(acpi, hidma_acpi_ids);
 
 static const struct of_device_id hidma_match[] = {
 	{.compatible = "qcom,hidma-1.0",},
-	{.compatible = "qcom,hidma-1.1",},
+	{.compatible = "qcom,hidma-1.1", .data = (void *)(HIDMA_MSI_CAP),},
+	{.compatible = "qcom,hidma-1.2",
+	 .data = (void *)(HIDMA_MSI_CAP | HIDMA_IDENTITY_CAP),},
 	{},
 };
 MODULE_DEVICE_TABLE(of, hidma_match);

drivers/dma/qcom/hidma_ll.c

@@ -393,6 +393,8 @@ static int hidma_ll_reset(struct hidma_lldev *lldev)
  */
 static void hidma_ll_int_handler_internal(struct hidma_lldev *lldev, int cause)
 {
+	unsigned long irqflags;
+
 	if (cause & HIDMA_ERR_INT_MASK) {
 		dev_err(lldev->dev, "error 0x%x, disabling...\n",
 				cause);
@@ -410,6 +412,10 @@ static void hidma_ll_int_handler_internal(struct hidma_lldev *lldev, int cause)
 		return;
 	}
 
+	spin_lock_irqsave(&lldev->lock, irqflags);
+	writel_relaxed(cause, lldev->evca + HIDMA_EVCA_IRQ_CLR_REG);
+	spin_unlock_irqrestore(&lldev->lock, irqflags);
+
 	/*
 	 * Fine tuned for this HW...
 	 *
@@ -421,9 +427,6 @@ static void hidma_ll_int_handler_internal(struct hidma_lldev *lldev, int cause)
 	 * Try to consume as many EVREs as possible.
 	 */
 	hidma_handle_tre_completion(lldev);
-
-	/* We consumed TREs or there are pending TREs or EVREs. */
-	writel_relaxed(cause, lldev->evca + HIDMA_EVCA_IRQ_CLR_REG);
 }
 
 irqreturn_t hidma_ll_inthandler(int chirq, void *arg)

drivers/dma/qcom/hidma_mgmt.c

@@ -17,6 +17,7 @@
 #include <linux/acpi.h>
 #include <linux/of.h>
 #include <linux/property.h>
+#include <linux/of_address.h>
 #include <linux/of_irq.h>
 #include <linux/of_platform.h>
 #include <linux/module.h>
@@ -356,59 +357,29 @@ static int __init hidma_mgmt_of_populate_channels(struct device_node *np)
 {
 	struct platform_device *pdev_parent = of_find_device_by_node(np);
 	struct platform_device_info pdevinfo;
-	struct of_phandle_args out_irq;
 	struct device_node *child;
-	struct resource *res = NULL;
-	const __be32 *cell;
-	int ret = 0, size, i, num;
-	u64 addr, addr_size;
+	struct resource *res;
+	int ret = 0;
+
+	/* allocate a resource array */
+	res = kcalloc(3, sizeof(*res), GFP_KERNEL);
+	if (!res)
+		return -ENOMEM;
 
 	for_each_available_child_of_node(np, child) {
-		struct resource *res_iter;
 		struct platform_device *new_pdev;
 
-		cell = of_get_property(child, "reg", &size);
-		if (!cell) {
-			ret = -EINVAL;
-			goto out;
-		}
-
-		size /= sizeof(*cell);
-		num = size /
-			(of_n_addr_cells(child) + of_n_size_cells(child)) + 1;
-
-		/* allocate a resource array */
-		res = kcalloc(num, sizeof(*res), GFP_KERNEL);
-		if (!res) {
-			ret = -ENOMEM;
-			goto out;
-		}
-
-		/* read each reg value */
-		i = 0;
-		res_iter = res;
-		while (i < size) {
-			addr = of_read_number(&cell[i],
-					      of_n_addr_cells(child));
-			i += of_n_addr_cells(child);
-
-			addr_size = of_read_number(&cell[i],
-						   of_n_size_cells(child));
-			i += of_n_size_cells(child);
-
-			res_iter->start = addr;
-			res_iter->end = res_iter->start + addr_size - 1;
-			res_iter->flags = IORESOURCE_MEM;
-			res_iter++;
-		}
-
-		ret = of_irq_parse_one(child, 0, &out_irq);
-		if (ret)
+		ret = of_address_to_resource(child, 0, &res[0]);
+		if (!ret)
 			goto out;
 
-		res_iter->start = irq_create_of_mapping(&out_irq);
-		res_iter->name = "hidma event irq";
-		res_iter->flags = IORESOURCE_IRQ;
+		ret = of_address_to_resource(child, 1, &res[1]);
+		if (!ret)
+			goto out;
+
+		ret = of_irq_to_resource(child, 0, &res[2]);
+		if (ret <= 0)
+			goto out;
 
 		memset(&pdevinfo, 0, sizeof(pdevinfo));
 		pdevinfo.fwnode = &child->fwnode;
@@ -416,7 +387,7 @@ static int __init hidma_mgmt_of_populate_channels(struct device_node *np)
 		pdevinfo.name = child->name;
 		pdevinfo.id = object_counter++;
 		pdevinfo.res = res;
-		pdevinfo.num_res = num;
+		pdevinfo.num_res = 3;
 		pdevinfo.data = NULL;
 		pdevinfo.size_data = 0;
 		pdevinfo.dma_mask = DMA_BIT_MASK(64);
@@ -434,8 +405,6 @@ static int __init hidma_mgmt_of_populate_channels(struct device_node *np)
 		 */
 		of_msi_configure(&new_pdev->dev, child);
 		of_node_put(child);
-		kfree(res);
-		res = NULL;
 	}
 out:
 	kfree(res);

drivers/dma/s3c24xx-dma.c

@@ -732,7 +732,7 @@ static int s3c24xx_dma_terminate_all(struct dma_chan *chan)
 
 	/* Dequeue current job */
 	if (s3cchan->at) {
-		s3c24xx_dma_desc_free(&s3cchan->at->vd);
+		vchan_terminate_vdesc(&s3cchan->at->vd);
 		s3cchan->at = NULL;
 	}
 
@@ -744,6 +744,13 @@ unlock:
 	return ret;
 }
 
+static void s3c24xx_dma_synchronize(struct dma_chan *chan)
+{
+	struct s3c24xx_dma_chan *s3cchan = to_s3c24xx_dma_chan(chan);
+
+	vchan_synchronize(&s3cchan->vc);
+}
+
 static void s3c24xx_dma_free_chan_resources(struct dma_chan *chan)
 {
 	/* Ensure all queued descriptors are freed */
@@ -1282,6 +1289,7 @@ static int s3c24xx_dma_probe(struct platform_device *pdev)
 	s3cdma->memcpy.device_issue_pending = s3c24xx_dma_issue_pending;
 	s3cdma->memcpy.device_config = s3c24xx_dma_set_runtime_config;
 	s3cdma->memcpy.device_terminate_all = s3c24xx_dma_terminate_all;
+	s3cdma->memcpy.device_synchronize = s3c24xx_dma_synchronize;
 
 	/* Initialize slave engine for SoC internal dedicated peripherals */
 	dma_cap_set(DMA_SLAVE, s3cdma->slave.cap_mask);
@@ -1296,6 +1304,7 @@ static int s3c24xx_dma_probe(struct platform_device *pdev)
 	s3cdma->slave.device_prep_dma_cyclic = s3c24xx_dma_prep_dma_cyclic;
 	s3cdma->slave.device_config = s3c24xx_dma_set_runtime_config;
 	s3cdma->slave.device_terminate_all = s3c24xx_dma_terminate_all;
+	s3cdma->slave.device_synchronize = s3c24xx_dma_synchronize;
 	s3cdma->slave.filter.map = pdata->slave_map;
 	s3cdma->slave.filter.mapcnt = pdata->slavecnt;
 	s3cdma->slave.filter.fn = s3c24xx_dma_filter;