linux-kernel - [PATCH] cdx: don't select CONFIG_GENERIC_MSI

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Message-Id: <20250805161059.4006484-1-arnd@kernel.org>
Date: Tue,  5 Aug 2025 18:10:48 +0200
From: Arnd Bergmann <arnd@...nel.org>
To: Nipun Gupta <nipun.gupta@....com>,
	Nikhil Agarwal <nikhil.agarwal@....com>
Cc: Thomas Gleixner <tglx@...utronix.de>,
	Marc Zyngier <maz@...nel.org>,
	Arnd Bergmann <arnd@...db.de>,
	Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Thomas Weißschuu <linux@...ssschuh.net>,
	Qiu-ji Chen <chenqiuji666@...il.com>,
	Peter Zijlstra <peterz@...radead.org>,
	"Rob Herring (Arm)" <robh@...nel.org>,
	Robin Murphy <robin.murphy@....com>,
	Abhijit Gangurde <abhijit.gangurde@....com>,
	Nathan Chancellor <nathan@...nel.org>,
	linux-kernel@...r.kernel.org
Subject: [PATCH] cdx: don't select CONFIG_GENERIC_MSI_IRQ

From: Arnd Bergmann <arnd@...db.de>

x86 does not use CONFIG_GENERIC_MSI_IRQ, and trying to enable it anyway
results in a build failure:

In file included from include/linux/ssb/ssb.h:10,
                 from drivers/ssb/pcihost_wrapper.c:18:
include/linux/gpio/driver.h:41:33: error: field 'msiinfo' has incomplete type
   41 |         msi_alloc_info_t        msiinfo;
      |                                 ^~~~~~~
In file included from include/linux/kvm_host.h:19,
                 from arch/x86/events/intel/core.c:17:
include/linux/msi.h:528:33: error: field 'alloc_info' has incomplete type
  528 |         msi_alloc_info_t        alloc_info;

Change the driver to actually build without this symbol and remove the
incorrect 'select' statements.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/cdx/Kconfig                     | 1 -
 drivers/cdx/cdx.c                       | 2 +-
 drivers/cdx/controller/Kconfig          | 1 -
 drivers/cdx/controller/cdx_controller.c | 3 ++-
 4 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/cdx/Kconfig b/drivers/cdx/Kconfig
index 3af41f51cf38..1f1e360507d7 100644
--- a/drivers/cdx/Kconfig
+++ b/drivers/cdx/Kconfig
@@ -8,7 +8,6 @@
 config CDX_BUS
 	bool "CDX Bus driver"
 	depends on OF && ARM64 || COMPILE_TEST
-	select GENERIC_MSI_IRQ
 	help
 	  Driver to enable Composable DMA Transfer(CDX) Bus. CDX bus
 	  exposes Fabric devices which uses composable DMA IP to the
diff --git a/drivers/cdx/cdx.c b/drivers/cdx/cdx.c
index 092306ca2541..1a5c95ba09ba 100644
--- a/drivers/cdx/cdx.c
+++ b/drivers/cdx/cdx.c
@@ -310,7 +310,7 @@ static int cdx_probe(struct device *dev)
 	 * Setup MSI device data so that generic MSI alloc/free can
 	 * be used by the device driver.
 	 */
-	if (cdx->msi_domain) {
+	if (IS_ENABLED(CONFIG_GENERIC_MSI_IRQ) && cdx->msi_domain) {
 		error = msi_setup_device_data(&cdx_dev->dev);
 		if (error)
 			return error;
diff --git a/drivers/cdx/controller/Kconfig b/drivers/cdx/controller/Kconfig
index 0641a4c21e66..a480b62cbd1f 100644
--- a/drivers/cdx/controller/Kconfig
+++ b/drivers/cdx/controller/Kconfig
@@ -10,7 +10,6 @@ if CDX_BUS
 config CDX_CONTROLLER
 	tristate "CDX bus controller"
 	depends on HAS_DMA
-	select GENERIC_MSI_IRQ
 	select REMOTEPROC
 	select RPMSG
 	help
diff --git a/drivers/cdx/controller/cdx_controller.c b/drivers/cdx/controller/cdx_controller.c
index fca83141e3e6..5e3fd89b6b56 100644
--- a/drivers/cdx/controller/cdx_controller.c
+++ b/drivers/cdx/controller/cdx_controller.c
@@ -193,7 +193,8 @@ static int xlnx_cdx_probe(struct platform_device *pdev)
 	cdx->ops = &cdx_ops;
 
 	/* Create MSI domain */
-	cdx->msi_domain = cdx_msi_domain_init(&pdev->dev);
+	if (IS_ENABLED(CONFIG_GENERIC_MSI_IRQ))
+		cdx->msi_domain = cdx_msi_domain_init(&pdev->dev);
 	if (!cdx->msi_domain) {
 		ret = dev_err_probe(&pdev->dev, -ENODEV, "cdx_msi_domain_init() failed");
 		goto cdx_msi_fail;
-- 
2.39.5