--- zzzz-none-000/linux-4.19.183/drivers/spi/spi.c	2021-03-24 10:07:39.000000000 +0000
+++ bcm63-7530ax-756/linux-4.19.183/drivers/spi/spi.c	2023-06-28 08:54:19.000000000 +0000
@@ -3075,6 +3075,28 @@
  * Return: zero on success, else a negative error code.
  */
 int spi_async(struct spi_device *spi, struct spi_message *message)
+#if defined(CONFIG_BCM_KF_SPI) && !defined(CONFIG_SPI_BCM63XX_HSSPI)
+{
+	struct spi_controller *ctlr = spi->controller;
+	int ret;
+	unsigned long flags;
+
+	ret = __spi_validate(spi, message);
+	if (ret != 0)
+		return ret;
+
+	/* holding the spinlock and disabling irqs for the duration of the transfer is problematic
+	 the controller driver manages the locking so call __spi_async without the lock */
+	spin_lock_irqsave(&ctlr->bus_lock_spinlock, flags);
+	if (ctlr->bus_lock_flag){
+		spin_unlock_irqrestore(&ctlr->bus_lock_spinlock, flags);
+		return -EBUSY;
+	}
+	spin_unlock_irqrestore(&ctlr->bus_lock_spinlock, flags);
+
+	return __spi_async(spi, message);
+}
+#else
 {
 	struct spi_controller *ctlr = spi->controller;
 	int ret;
@@ -3095,6 +3117,7 @@
 
 	return ret;
 }
+#endif
 EXPORT_SYMBOL_GPL(spi_async);
 
 /**