Merge tag 'dmaengine-fix-5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine

Pull dmaengine fixes from Vinod Koul:
 "One core fix for DMA_INTERRUPT and rest driver fixes.

  Core:

   - Revert verification of DMA_INTERRUPT capability as that was
     incorrect

  Bunch of driver fixes for:

   - ti: refcount and put_device leak

   - qcom_bam: runtime pm overflow

   - idxd: force wq context cleanup and call idxd_enable_system_pasid()
     on success

   - dw-axi-dmac: RMW on channel suspend register

   - imx-sdma: restart cyclic channel when enabled

   - at_xdma: error handling for at_xdmac_alloc_desc

   - pl330: lockdep warning

   - lgm: error handling path in probe

   - allwinner: Fix min/max typo in binding"

* tag 'dmaengine-fix-5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine:
  dt-bindings: dma: allwinner,sun50i-a64-dma: Fix min/max typo
  dmaengine: lgm: Fix an error handling path in intel_ldma_probe()
  dmaengine: pl330: Fix lockdep warning about non-static key
  dmaengine: idxd: Only call idxd_enable_system_pasid() if succeeded in enabling SVA feature
  dmaengine: at_xdma: handle errors of at_xdmac_alloc_desc() correctly
  dmaengine: imx-sdma: only restart cyclic channel when enabled
  dmaengine: dw-axi-dmac: Fix RMW on channel suspend register
  dmaengine: idxd: force wq context cleanup on device disable path
  dmaengine: qcom: bam_dma: fix runtime PM underflow
  dmaengine: imx-sdma: Allow imx8m for imx7 FW revs
  dmaengine: Revert "dmaengine: add verification of DMA_INTERRUPT capability for dmatest"
  dmaengine: ti: Add missing put_device in ti_dra7_xbar_route_allocate
  dmaengine: ti: Fix refcount leak in ti_dra7_xbar_route_allocate

Author: torvalds

Documentation/devicetree/bindings/dma/allwinner,sun50i-a64-dma.yaml

@@ -67,7 +67,7 @@ if:
 then:
   properties:
     clocks:
-      maxItems: 2
+      minItems: 2
 
   required:
     - clock-names

drivers/dma/at_xdmac.c

@@ -1900,6 +1900,11 @@ static int at_xdmac_alloc_chan_resources(struct dma_chan *chan)
 	for (i = 0; i < init_nr_desc_per_channel; i++) {
 		desc = at_xdmac_alloc_desc(chan, GFP_KERNEL);
 		if (!desc) {
+			if (i == 0) {
+				dev_warn(chan2dev(chan),
+					 "can't allocate any descriptors\n");
+				return -EIO;
+			}
 			dev_warn(chan2dev(chan),
 				"only %d descriptors have been allocated\n", i);
 			break;

drivers/dma/dmatest.c

@@ -675,16 +675,10 @@ static int dmatest_func(void *data)
 	/*
 	 * src and dst buffers are freed by ourselves below
 	 */
-	if (params->polled) {
+	if (params->polled)
 		flags = DMA_CTRL_ACK;
-	} else {
-		if (dma_has_cap(DMA_INTERRUPT, dev->cap_mask)) {
-			flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT;
-		} else {
-			pr_err("Channel does not support interrupt!\n");
-			goto err_pq_array;
-		}
-	}
+	else
+		flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT;
 
 	ktime = ktime_get();
 	while (!(kthread_should_stop() ||
@@ -912,7 +906,6 @@ static int dmatest_func(void *data)
 	runtime = ktime_to_us(ktime);
 
 	ret = 0;
-err_pq_array:
 	kfree(dma_pq);
 err_srcs_array:
 	kfree(srcs);

drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c

@@ -1164,8 +1164,9 @@ static int dma_chan_pause(struct dma_chan *dchan)
 			BIT(chan->id) << DMAC_CHAN_SUSP_WE_SHIFT;
 		axi_dma_iowrite32(chan->chip, DMAC_CHEN, val);
 	} else {
-		val = BIT(chan->id) << DMAC_CHAN_SUSP2_SHIFT |
-		      BIT(chan->id) << DMAC_CHAN_SUSP2_WE_SHIFT;
+		val = axi_dma_ioread32(chan->chip, DMAC_CHSUSPREG);
+		val |= BIT(chan->id) << DMAC_CHAN_SUSP2_SHIFT |
+			BIT(chan->id) << DMAC_CHAN_SUSP2_WE_SHIFT;
 		axi_dma_iowrite32(chan->chip, DMAC_CHSUSPREG, val);
 	}
 
@@ -1190,12 +1191,13 @@ static inline void axi_chan_resume(struct axi_dma_chan *chan)
 {
 	u32 val;
 
-	val = axi_dma_ioread32(chan->chip, DMAC_CHEN);
 	if (chan->chip->dw->hdata->reg_map_8_channels) {
+		val = axi_dma_ioread32(chan->chip, DMAC_CHEN);
 		val &= ~(BIT(chan->id) << DMAC_CHAN_SUSP_SHIFT);
 		val |=  (BIT(chan->id) << DMAC_CHAN_SUSP_WE_SHIFT);
 		axi_dma_iowrite32(chan->chip, DMAC_CHEN, val);
 	} else {
+		val = axi_dma_ioread32(chan->chip, DMAC_CHSUSPREG);
 		val &= ~(BIT(chan->id) << DMAC_CHAN_SUSP2_SHIFT);
 		val |=  (BIT(chan->id) << DMAC_CHAN_SUSP2_WE_SHIFT);
 		axi_dma_iowrite32(chan->chip, DMAC_CHSUSPREG, val);

drivers/dma/idxd/device.c

@@ -716,10 +716,7 @@ static void idxd_device_wqs_clear_state(struct idxd_device *idxd)
 		struct idxd_wq *wq = idxd->wqs[i];
 
 		mutex_lock(&wq->wq_lock);
-		if (wq->state == IDXD_WQ_ENABLED) {
-			idxd_wq_disable_cleanup(wq);
-			wq->state = IDXD_WQ_DISABLED;
-		}
+		idxd_wq_disable_cleanup(wq);
 		idxd_wq_device_reset_cleanup(wq);
 		mutex_unlock(&wq->wq_lock);
 	}

drivers/dma/idxd/init.c

@@ -512,15 +512,16 @@ static int idxd_probe(struct idxd_device *idxd)
 	dev_dbg(dev, "IDXD reset complete\n");
 
 	if (IS_ENABLED(CONFIG_INTEL_IDXD_SVM) && sva) {
-		if (iommu_dev_enable_feature(dev, IOMMU_DEV_FEAT_SVA))
+		if (iommu_dev_enable_feature(dev, IOMMU_DEV_FEAT_SVA)) {
 			dev_warn(dev, "Unable to turn on user SVA feature.\n");
-		else
+		} else {
 			set_bit(IDXD_FLAG_USER_PASID_ENABLED, &idxd->flags);
 
-		if (idxd_enable_system_pasid(idxd))
-			dev_warn(dev, "No in-kernel DMA with PASID.\n");
-		else
-			set_bit(IDXD_FLAG_PASID_ENABLED, &idxd->flags);
+			if (idxd_enable_system_pasid(idxd))
+				dev_warn(dev, "No in-kernel DMA with PASID.\n");
+			else
+				set_bit(IDXD_FLAG_PASID_ENABLED, &idxd->flags);
+		}
 	} else if (!sva) {
 		dev_warn(dev, "User forced SVA off via module param.\n");
 	}

drivers/dma/imx-sdma.c

@@ -891,7 +891,7 @@ static void sdma_update_channel_loop(struct sdma_channel *sdmac)
 	 * SDMA stops cyclic channel when DMA request triggers a channel and no SDMA
 	 * owned buffer is available (i.e. BD_DONE was set too late).
 	 */
-	if (!is_sdma_channel_enabled(sdmac->sdma, sdmac->channel)) {
+	if (sdmac->desc && !is_sdma_channel_enabled(sdmac->sdma, sdmac->channel)) {
 		dev_warn(sdmac->sdma->dev, "restart cyclic channel %d\n", sdmac->channel);
 		sdma_enable_channel(sdmac->sdma, sdmac->channel);
 	}
@@ -2346,7 +2346,7 @@ 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)
+#if IS_ENABLED(CONFIG_SOC_IMX7D) || IS_ENABLED(CONFIG_SOC_IMX8M)
 MODULE_FIRMWARE("imx/sdma/sdma-imx7d.bin");
 #endif
 MODULE_LICENSE("GPL");

drivers/dma/lgm/lgm-dma.c

@@ -1593,11 +1593,12 @@ static int intel_ldma_probe(struct platform_device *pdev)
 	d->core_clk = devm_clk_get_optional(dev, NULL);
 	if (IS_ERR(d->core_clk))
 		return PTR_ERR(d->core_clk);
-	clk_prepare_enable(d->core_clk);
 
 	d->rst = devm_reset_control_get_optional(dev, NULL);
 	if (IS_ERR(d->rst))
 		return PTR_ERR(d->rst);
+
+	clk_prepare_enable(d->core_clk);
 	reset_control_deassert(d->rst);
 
 	ret = devm_add_action_or_reset(dev, ldma_clk_disable, d);

drivers/dma/pl330.c

@@ -2589,7 +2589,7 @@ static struct dma_pl330_desc *pl330_get_desc(struct dma_pl330_chan *pch)
 
 	/* If the DMAC pool is empty, alloc new */
 	if (!desc) {
-		DEFINE_SPINLOCK(lock);
+		static DEFINE_SPINLOCK(lock);
 		LIST_HEAD(pool);
 
 		if (!add_desc(&pool, &lock, GFP_ATOMIC, 1))

drivers/dma/qcom/bam_dma.c

@@ -558,14 +558,6 @@ static int bam_alloc_chan(struct dma_chan *chan)
 	return 0;
 }
 
-static int bam_pm_runtime_get_sync(struct device *dev)
-{
-	if (pm_runtime_enabled(dev))
-		return pm_runtime_get_sync(dev);
-
-	return 0;
-}
-
 /**
  * bam_free_chan - Frees dma resources associated with specific channel
  * @chan: specified channel
@@ -581,7 +573,7 @@ static void bam_free_chan(struct dma_chan *chan)
 	unsigned long flags;
 	int ret;
 
-	ret = bam_pm_runtime_get_sync(bdev->dev);
+	ret = pm_runtime_get_sync(bdev->dev);
 	if (ret < 0)
 		return;
 
@@ -784,7 +776,7 @@ static int bam_pause(struct dma_chan *chan)
 	unsigned long flag;
 	int ret;
 
-	ret = bam_pm_runtime_get_sync(bdev->dev);
+	ret = pm_runtime_get_sync(bdev->dev);
 	if (ret < 0)
 		return ret;
 
@@ -810,7 +802,7 @@ static int bam_resume(struct dma_chan *chan)
 	unsigned long flag;
 	int ret;
 
-	ret = bam_pm_runtime_get_sync(bdev->dev);
+	ret = pm_runtime_get_sync(bdev->dev);
 	if (ret < 0)
 		return ret;
 
@@ -919,7 +911,7 @@ static irqreturn_t bam_dma_irq(int irq, void *data)
 	if (srcs & P_IRQ)
 		tasklet_schedule(&bdev->task);
 
-	ret = bam_pm_runtime_get_sync(bdev->dev);
+	ret = pm_runtime_get_sync(bdev->dev);
 	if (ret < 0)
 		return IRQ_NONE;
 
@@ -1037,7 +1029,7 @@ static void bam_start_dma(struct bam_chan *bchan)
 	if (!vd)
 		return;
 
-	ret = bam_pm_runtime_get_sync(bdev->dev);
+	ret = pm_runtime_get_sync(bdev->dev);
 	if (ret < 0)
 		return;
 
@@ -1374,11 +1366,6 @@ static int bam_dma_probe(struct platform_device *pdev)
 	if (ret)
 		goto err_unregister_dma;
 
-	if (!bdev->bamclk) {
-		pm_runtime_disable(&pdev->dev);
-		return 0;
-	}
-
 	pm_runtime_irq_safe(&pdev->dev);
 	pm_runtime_set_autosuspend_delay(&pdev->dev, BAM_DMA_AUTOSUSPEND_DELAY);
 	pm_runtime_use_autosuspend(&pdev->dev);
@@ -1462,10 +1449,8 @@ static int __maybe_unused bam_dma_suspend(struct device *dev)
 {
 	struct bam_device *bdev = dev_get_drvdata(dev);
 
-	if (bdev->bamclk) {
-		pm_runtime_force_suspend(dev);
-		clk_unprepare(bdev->bamclk);
-	}
+	pm_runtime_force_suspend(dev);
+	clk_unprepare(bdev->bamclk);
 
 	return 0;
 }
@@ -1475,13 +1460,11 @@ static int __maybe_unused bam_dma_resume(struct device *dev)
 	struct bam_device *bdev = dev_get_drvdata(dev);
 	int ret;
 
-	if (bdev->bamclk) {
-		ret = clk_prepare(bdev->bamclk);
-		if (ret)
-			return ret;
+	ret = clk_prepare(bdev->bamclk);
+	if (ret)
+		return ret;
 
-		pm_runtime_force_resume(dev);
-	}
+	pm_runtime_force_resume(dev);
 
 	return 0;
 }