Merge tag 'i2c-for-6.16-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux

Pull i2c fixes from Wolfram Sang:
 "omap:
   - add missing error check
   - fix PM disable in probe error path

  stm32:
   - unmap DMA buffer on transfer failure
   - use correct device when mapping and unmapping during transfers"

* tag 'i2c-for-6.16-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: stm32f7: unmap DMA mapped buffer
  i2c: stm32: fix the device used for the DMA map
  i2c: omap: Fix an error handling path in omap_i2c_probe()
  i2c: omap: Handle omap_i2c_init() errors in omap_i2c_probe()

Author: torvalds

drivers/i2c/busses/i2c-omap.c

@@ -1472,7 +1472,9 @@ omap_i2c_probe(struct platform_device *pdev)
 	}
 
 	/* reset ASAP, clearing any IRQs */
-	omap_i2c_init(omap);
+	r = omap_i2c_init(omap);
+	if (r)
+		goto err_mux_state_deselect;
 
 	if (omap->rev < OMAP_I2C_OMAP1_REV_2)
 		r = devm_request_irq(&pdev->dev, omap->irq, omap_i2c_omap1_isr,
@@ -1515,12 +1517,13 @@ omap_i2c_probe(struct platform_device *pdev)
 
 err_unuse_clocks:
 	omap_i2c_write_reg(omap, OMAP_I2C_CON_REG, 0);
+err_mux_state_deselect:
 	if (omap->mux_state)
 		mux_state_deselect(omap->mux_state);
 err_put_pm:
-	pm_runtime_dont_use_autosuspend(omap->dev);
 	pm_runtime_put_sync(omap->dev);
 err_disable_pm:
+	pm_runtime_dont_use_autosuspend(omap->dev);
 	pm_runtime_disable(&pdev->dev);
 
 	return r;

drivers/i2c/busses/i2c-stm32.c

@@ -102,7 +102,6 @@ int stm32_i2c_prep_dma_xfer(struct device *dev, struct stm32_i2c_dma *dma,
 			    void *dma_async_param)
 {
 	struct dma_async_tx_descriptor *txdesc;
-	struct device *chan_dev;
 	int ret;
 
 	if (rd_wr) {
@@ -116,11 +115,10 @@ int stm32_i2c_prep_dma_xfer(struct device *dev, struct stm32_i2c_dma *dma,
 	}
 
 	dma->dma_len = len;
-	chan_dev = dma->chan_using->device->dev;
 
-	dma->dma_buf = dma_map_single(chan_dev, buf, dma->dma_len,
+	dma->dma_buf = dma_map_single(dev, buf, dma->dma_len,
 				      dma->dma_data_dir);
-	if (dma_mapping_error(chan_dev, dma->dma_buf)) {
+	if (dma_mapping_error(dev, dma->dma_buf)) {
 		dev_err(dev, "DMA mapping failed\n");
 		return -EINVAL;
 	}
@@ -150,7 +148,7 @@ int stm32_i2c_prep_dma_xfer(struct device *dev, struct stm32_i2c_dma *dma,
 	return 0;
 
 err:
-	dma_unmap_single(chan_dev, dma->dma_buf, dma->dma_len,
+	dma_unmap_single(dev, dma->dma_buf, dma->dma_len,
 			 dma->dma_data_dir);
 	return ret;
 }

drivers/i2c/busses/i2c-stm32f7.c

@@ -739,12 +739,13 @@ static void stm32f7_i2c_disable_dma_req(struct stm32f7_i2c_dev *i2c_dev)
 
 static void stm32f7_i2c_dma_callback(void *arg)
 {
-	struct stm32f7_i2c_dev *i2c_dev = (struct stm32f7_i2c_dev *)arg;
+	struct stm32f7_i2c_dev *i2c_dev = arg;
 	struct stm32_i2c_dma *dma = i2c_dev->dma;
-	struct device *dev = dma->chan_using->device->dev;
 
 	stm32f7_i2c_disable_dma_req(i2c_dev);
-	dma_unmap_single(dev, dma->dma_buf, dma->dma_len, dma->dma_data_dir);
+	dmaengine_terminate_async(dma->chan_using);
+	dma_unmap_single(i2c_dev->dev, dma->dma_buf, dma->dma_len,
+			 dma->dma_data_dir);
 	complete(&dma->dma_complete);
 }
 
@@ -1510,7 +1511,6 @@ static irqreturn_t stm32f7_i2c_handle_isr_errs(struct stm32f7_i2c_dev *i2c_dev,
 	u16 addr = f7_msg->addr;
 	void __iomem *base = i2c_dev->base;
 	struct device *dev = i2c_dev->dev;
-	struct stm32_i2c_dma *dma = i2c_dev->dma;
 
 	/* Bus error */
 	if (status & STM32F7_I2C_ISR_BERR) {
@@ -1551,10 +1551,8 @@ static irqreturn_t stm32f7_i2c_handle_isr_errs(struct stm32f7_i2c_dev *i2c_dev,
 	}
 
 	/* Disable dma */
-	if (i2c_dev->use_dma) {
-		stm32f7_i2c_disable_dma_req(i2c_dev);
-		dmaengine_terminate_async(dma->chan_using);
-	}
+	if (i2c_dev->use_dma)
+		stm32f7_i2c_dma_callback(i2c_dev);
 
 	i2c_dev->master_mode = false;
 	complete(&i2c_dev->complete);
@@ -1600,7 +1598,6 @@ static irqreturn_t stm32f7_i2c_isr_event_thread(int irq, void *data)
 {
 	struct stm32f7_i2c_dev *i2c_dev = data;
 	struct stm32f7_i2c_msg *f7_msg = &i2c_dev->f7_msg;
-	struct stm32_i2c_dma *dma = i2c_dev->dma;
 	void __iomem *base = i2c_dev->base;
 	u32 status, mask;
 	int ret;
@@ -1619,10 +1616,8 @@ static irqreturn_t stm32f7_i2c_isr_event_thread(int irq, void *data)
 		dev_dbg(i2c_dev->dev, "<%s>: Receive NACK (addr %x)\n",
 			__func__, f7_msg->addr);
 		writel_relaxed(STM32F7_I2C_ICR_NACKCF, base + STM32F7_I2C_ICR);
-		if (i2c_dev->use_dma) {
-			stm32f7_i2c_disable_dma_req(i2c_dev);
-			dmaengine_terminate_async(dma->chan_using);
-		}
+		if (i2c_dev->use_dma)
+			stm32f7_i2c_dma_callback(i2c_dev);
 		f7_msg->result = -ENXIO;
 	}
 
@@ -1640,8 +1635,7 @@ static irqreturn_t stm32f7_i2c_isr_event_thread(int irq, void *data)
 			ret = wait_for_completion_timeout(&i2c_dev->dma->dma_complete, HZ);
 			if (!ret) {
 				dev_dbg(i2c_dev->dev, "<%s>: Timed out\n", __func__);
-				stm32f7_i2c_disable_dma_req(i2c_dev);
-				dmaengine_terminate_async(dma->chan_using);
+				stm32f7_i2c_dma_callback(i2c_dev);
 				f7_msg->result = -ETIMEDOUT;
 			}
 		}