spi: Merge fixes

The automated merge for the spidev locking fixes is going wrong and
merging the unlock twice.

drivers/spi/spi-cadence-xspi.c

@@ -177,7 +177,10 @@
 #define CDNS_XSPI_CMD_FLD_DSEQ_CMD_3(op) ( \
 	FIELD_PREP(CDNS_XSPI_CMD_DSEQ_R3_DCNT_H, \
 		((op)->data.nbytes >> 16) & 0xffff) | \
-	FIELD_PREP(CDNS_XSPI_CMD_DSEQ_R3_NUM_OF_DUMMY, (op)->dummy.nbytes * 8))
+	FIELD_PREP(CDNS_XSPI_CMD_DSEQ_R3_NUM_OF_DUMMY, \
+		  (op)->dummy.buswidth != 0 ? \
+		  (((op)->dummy.nbytes * 8) / (op)->dummy.buswidth) : \
+		  0))
 
 #define CDNS_XSPI_CMD_FLD_DSEQ_CMD_4(op, chipsel) ( \
 	FIELD_PREP(CDNS_XSPI_CMD_DSEQ_R4_BANK, chipsel) | \

drivers/spi/spi-dw-core.c

@@ -366,7 +366,7 @@ static void dw_spi_irq_setup(struct dw_spi *dws)
 	 * will be adjusted at the final stage of the IRQ-based SPI transfer
 	 * execution so not to lose the leftover of the incoming data.
 	 */
-	level = min_t(u16, dws->fifo_len / 2, dws->tx_len);
+	level = min_t(unsigned int, dws->fifo_len / 2, dws->tx_len);
 	dw_writel(dws, DW_SPI_TXFTLR, level);
 	dw_writel(dws, DW_SPI_RXFTLR, level - 1);
 

drivers/spi/spi-mt65xx.c

@@ -1253,6 +1253,11 @@ static int mtk_spi_probe(struct platform_device *pdev)
 		dev_notice(dev, "SPI dma_set_mask(%d) failed, ret:%d\n",
 			   addr_bits, ret);
 
+	ret = devm_request_irq(dev, irq, mtk_spi_interrupt,
+			       IRQF_TRIGGER_NONE, dev_name(dev), master);
+	if (ret)
+		return dev_err_probe(dev, ret, "failed to register irq\n");
+
 	pm_runtime_enable(dev);
 
 	ret = devm_spi_register_master(dev, master);
@@ -1261,13 +1266,6 @@ static int mtk_spi_probe(struct platform_device *pdev)
 		return dev_err_probe(dev, ret, "failed to register master\n");
 	}
 
-	ret = devm_request_irq(dev, irq, mtk_spi_interrupt,
-			       IRQF_TRIGGER_NONE, dev_name(dev), master);
-	if (ret) {
-		pm_runtime_disable(dev);
-		return dev_err_probe(dev, ret, "failed to register irq\n");
-	}
-
 	return 0;
 }
 

drivers/spi/spidev.c

@@ -68,7 +68,7 @@ static_assert(N_SPI_MINORS > 0 && N_SPI_MINORS <= 256);
 
 struct spidev_data {
 	dev_t			devt;
-	spinlock_t		spi_lock;
+	struct mutex		spi_lock;
 	struct spi_device	*spi;
 	struct list_head	device_entry;
 
@@ -89,24 +89,35 @@ MODULE_PARM_DESC(bufsiz, "data bytes in biggest supported SPI message");
 
 /*-------------------------------------------------------------------------*/
 
+static ssize_t
+spidev_sync_unlocked(struct spi_device *spi, struct spi_message *message)
+{
+	ssize_t status;
+
+	status = spi_sync(spi, message);
+	if (status == 0)
+		status = message->actual_length;
+
+	return status;
+}
+
 static ssize_t
 spidev_sync(struct spidev_data *spidev, struct spi_message *message)
 {
-	int status;
+	ssize_t status;
 	struct spi_device *spi;
 
-	spin_lock_irq(&spidev->spi_lock);
+	mutex_lock(&spidev->spi_lock);
 	spi = spidev->spi;
-	spin_unlock_irq(&spidev->spi_lock);
 
 	if (spi == NULL)
 		status = -ESHUTDOWN;
 	else
-		status = spi_sync(spi, message);
+		status = spidev_sync_unlocked(spi, message);
 
-	if (status == 0)
-		status = message->actual_length;
+	mutex_unlock(&spidev->spi_lock);
 
+	mutex_unlock(&spidev->spi_lock);
 	return status;
 }
 
@@ -294,7 +305,7 @@ static int spidev_message(struct spidev_data *spidev,
 		spi_message_add_tail(k_tmp, &msg);
 	}
 
-	status = spidev_sync(spidev, &msg);
+	status = spidev_sync_unlocked(spidev->spi, &msg);
 	if (status < 0)
 		goto done;
 
@@ -359,12 +370,12 @@ spidev_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 	 * we issue this ioctl.
 	 */
 	spidev = filp->private_data;
-	spin_lock_irq(&spidev->spi_lock);
+	mutex_lock(&spidev->spi_lock);
 	spi = spi_dev_get(spidev->spi);
-	spin_unlock_irq(&spidev->spi_lock);
-
-	if (spi == NULL)
+	if (spi == NULL) {
+		mutex_unlock(&spidev->spi_lock);
 		return -ESHUTDOWN;
+	}
 
 	/* use the buffer lock here for triple duty:
 	 *  - prevent I/O (from us) so calling spi_setup() is safe;
@@ -508,6 +519,7 @@ spidev_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 
 	mutex_unlock(&spidev->buf_lock);
 	spi_dev_put(spi);
+	mutex_unlock(&spidev->spi_lock);
 	return retval;
 }
 
@@ -529,12 +541,12 @@ spidev_compat_ioc_message(struct file *filp, unsigned int cmd,
 	 * we issue this ioctl.
 	 */
 	spidev = filp->private_data;
-	spin_lock_irq(&spidev->spi_lock);
+	mutex_lock(&spidev->spi_lock);
 	spi = spi_dev_get(spidev->spi);
-	spin_unlock_irq(&spidev->spi_lock);
-
-	if (spi == NULL)
+	if (spi == NULL) {
+		mutex_unlock(&spidev->spi_lock);
 		return -ESHUTDOWN;
+	}
 
 	/* SPI_IOC_MESSAGE needs the buffer locked "normally" */
 	mutex_lock(&spidev->buf_lock);
@@ -561,6 +573,7 @@ spidev_compat_ioc_message(struct file *filp, unsigned int cmd,
 done:
 	mutex_unlock(&spidev->buf_lock);
 	spi_dev_put(spi);
+	mutex_unlock(&spidev->spi_lock);
 	return retval;
 }
 
@@ -601,7 +614,6 @@ static int spidev_open(struct inode *inode, struct file *filp)
 	if (!spidev->tx_buffer) {
 		spidev->tx_buffer = kmalloc(bufsiz, GFP_KERNEL);
 		if (!spidev->tx_buffer) {
-			dev_dbg(&spidev->spi->dev, "open/ENOMEM\n");
 			status = -ENOMEM;
 			goto err_find_dev;
 		}
@@ -610,7 +622,6 @@ static int spidev_open(struct inode *inode, struct file *filp)
 	if (!spidev->rx_buffer) {
 		spidev->rx_buffer = kmalloc(bufsiz, GFP_KERNEL);
 		if (!spidev->rx_buffer) {
-			dev_dbg(&spidev->spi->dev, "open/ENOMEM\n");
 			status = -ENOMEM;
 			goto err_alloc_rx_buf;
 		}
@@ -640,10 +651,10 @@ static int spidev_release(struct inode *inode, struct file *filp)
 	spidev = filp->private_data;
 	filp->private_data = NULL;
 
-	spin_lock_irq(&spidev->spi_lock);
+	mutex_lock(&spidev->spi_lock);
 	/* ... after we unbound from the underlying device? */
 	dofree = (spidev->spi == NULL);
-	spin_unlock_irq(&spidev->spi_lock);
+	mutex_unlock(&spidev->spi_lock);
 
 	/* last close? */
 	spidev->users--;
@@ -780,7 +791,7 @@ static int spidev_probe(struct spi_device *spi)
 
 	/* Initialize the driver data */
 	spidev->spi = spi;
-	spin_lock_init(&spidev->spi_lock);
+	mutex_init(&spidev->spi_lock);
 	mutex_init(&spidev->buf_lock);
 
 	INIT_LIST_HEAD(&spidev->device_entry);
@@ -825,9 +836,9 @@ static void spidev_remove(struct spi_device *spi)
 	/* prevent new opens */
 	mutex_lock(&device_list_lock);
 	/* make sure ops on existing fds can abort cleanly */
-	spin_lock_irq(&spidev->spi_lock);
+	mutex_lock(&spidev->spi_lock);
 	spidev->spi = NULL;
-	spin_unlock_irq(&spidev->spi_lock);
+	mutex_unlock(&spidev->spi_lock);
 
 	list_del(&spidev->device_entry);
 	device_destroy(spidev_class, spidev->devt);