Merge tag 'char-misc-6.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc and other driver subsystem updates from Greg KH:
 "Here is the big set of char/misc and a number of other driver
  subsystem updates for 6.9-rc1. Included in here are:

   - IIO driver updates, loads of new ones and evolution of existing ones

   - coresight driver updates

   - const cleanups for many driver subsystems

   - speakup driver additions

   - platform remove callback void cleanups

   - mei driver updates

   - mhi driver updates

   - cdx driver updates for MSI interrupt handling

   - nvmem driver updates

   - other smaller driver updates and cleanups, full details in the
    shortlog

  All of these have been in linux-next for a long time with no reported
  issue, other than a build warning for the speakup driver"

The build warning hits clang and is a gcc (and C23) extension, and is
fixed up in the merge.

Link: https://lore.kernel.org/all/20240321134831.GA2762840@dev-arch.thelio-3990X/

* tag 'char-misc-6.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (279 commits)
  binder: remove redundant variable page_addr
  uio_dmem_genirq: UIO_MEM_DMA_COHERENT conversion
  uio_pruss: UIO_MEM_DMA_COHERENT conversion
  cnic,bnx2,bnx2x: use UIO_MEM_DMA_COHERENT
  uio: introduce UIO_MEM_DMA_COHERENT type
  cdx: add MSI support for CDX bus
  pps: use cflags-y instead of EXTRA_CFLAGS
  speakup: Add /dev/synthu device
  speakup: Fix 8bit characters from direct synth
  parport: sunbpp: Convert to platform remove callback returning void
  parport: amiga: Convert to platform remove callback returning void
  char: xillybus: Convert to platform remove callback returning void
  vmw_balloon: change maintainership
  MAINTAINERS: change the maintainer for hpilo driver
  char: xilinx_hwicap: Fix NULL vs IS_ERR() bug
  hpet: remove hpets::hp_clocksource
  platform: goldfish: move the separate 'default' propery for CONFIG_GOLDFISH
  char: xilinx_hwicap: drop casting to void in dev_set_drvdata
  greybus: move is_gb_* functions out of greybus.h
  greybus: Remove usage of the deprecated ida_simple_xx() API
  ...

1 files changed, 20 insertions, 0 deletions

diff --git a/drivers/cdx/cdx.c b/drivers/cdx/cdx.c
index b74d76afccb6..236d381dc5f7 100644
--- a/drivers/cdx/cdx.c
+++ b/drivers/cdx/cdx.c
@@ -56,6 +56,7 @@
  */
 
 #include <linux/init.h>
+#include <linux/irqdomain.h>
 #include <linux/kernel.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
@@ -302,8 +303,19 @@ static int cdx_probe(struct device *dev)
 {
 	struct cdx_driver *cdx_drv = to_cdx_driver(dev->driver);
 	struct cdx_device *cdx_dev = to_cdx_device(dev);
+	struct cdx_controller *cdx = cdx_dev->cdx;
 	int error;
 
+	/*
+	 * Setup MSI device data so that generic MSI alloc/free can
+	 * be used by the device driver.
+	 */
+	if (cdx->msi_domain) {
+		error = msi_setup_device_data(&cdx_dev->dev);
+		if (error)
+			return error;
+	}
+
 	error = cdx_drv->probe(cdx_dev);
 	if (error) {
 		dev_err_probe(dev, error, "%s failed\n", __func__);
@@ -787,6 +799,7 @@ int cdx_device_add(struct cdx_dev_params *dev_params)
 
 	/* Populate CDX dev params */
 	cdx_dev->req_id = dev_params->req_id;
+	cdx_dev->msi_dev_id = dev_params->msi_dev_id;
 	cdx_dev->vendor = dev_params->vendor;
 	cdx_dev->device = dev_params->device;
 	cdx_dev->subsystem_vendor = dev_params->subsys_vendor;
@@ -804,12 +817,19 @@ int cdx_device_add(struct cdx_dev_params *dev_params)
 	cdx_dev->dev.bus = &cdx_bus_type;
 	cdx_dev->dev.dma_mask = &cdx_dev->dma_mask;
 	cdx_dev->dev.release = cdx_device_release;
+	cdx_dev->msi_write_pending = false;
+	mutex_init(&cdx_dev->irqchip_lock);
 
 	/* Set Name */
 	dev_set_name(&cdx_dev->dev, "cdx-%02x:%02x",
 		     ((cdx->id << CDX_CONTROLLER_ID_SHIFT) | (cdx_dev->bus_num & CDX_BUS_NUM_MASK)),
 		     cdx_dev->dev_num);
 
+	if (cdx->msi_domain) {
+		cdx_dev->num_msi = dev_params->num_msi;
+		dev_set_msi_domain(&cdx_dev->dev, cdx->msi_domain);
+	}
+
 	ret = device_add(&cdx_dev->dev);
 	if (ret) {
 		dev_err(&cdx_dev->dev,