[PATCH 2/2] vfio/cdx: update driver to build without CONFIG_GENERIC_MSI_IRQ

[Nipun Gupta]

Define dummy MSI related APIs in VFIO CDX driver to build the
driver without enabling CONFIG_GENERIC_MSI_IRQ flag.

Reported-by: kernel test robot <lkp@xxxxxxxxx>
Closes: https://lore.kernel.org/oe-kbuild-all/202508070308.opy5dIFX-lkp@xxxxxxxxx/
Reviewed-by: Nikhil Agarwal <nikhil.agarwal@xxxxxxx>
Signed-off-by: Nipun Gupta <nipun.gupta@xxxxxxx>
---
 drivers/vfio/cdx/Makefile  |  6 +++++-
 drivers/vfio/cdx/private.h | 14 ++++++++++++++
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/drivers/vfio/cdx/Makefile b/drivers/vfio/cdx/Makefile
index df92b320122a..7dc7bdcdcaa9 100644
--- a/drivers/vfio/cdx/Makefile
+++ b/drivers/vfio/cdx/Makefile
@@ -5,4 +5,8 @@
 
 obj-$(CONFIG_VFIO_CDX) += vfio-cdx.o
 
-vfio-cdx-objs := main.o intr.o
+vfio-cdx-objs := main.o
+
+ifdef CONFIG_GENERIC_MSI_IRQ
+obj-$(CONFIG_VFIO_CDX) += intr.o
+endif
diff --git a/drivers/vfio/cdx/private.h b/drivers/vfio/cdx/private.h
index dc56729b3114..0482a1516439 100644
--- a/drivers/vfio/cdx/private.h
+++ b/drivers/vfio/cdx/private.h
@@ -38,11 +38,25 @@ struct vfio_cdx_device {
 	u8			config_msi;
 };
 
+#ifdef CONFIG_GENERIC_MSI_IRQ
 int vfio_cdx_set_irqs_ioctl(struct vfio_cdx_device *vdev,
 			    u32 flags, unsigned int index,
 			    unsigned int start, unsigned int count,
 			    void *data);
 
 void vfio_cdx_irqs_cleanup(struct vfio_cdx_device *vdev);
+#else
+static int vfio_cdx_set_irqs_ioctl(struct vfio_cdx_device *vdev,
+				   u32 flags, unsigned int index,
+				   unsigned int start, unsigned int count,
+				   void *data)
+{
+	return 0;
+}
+
+static void vfio_cdx_irqs_cleanup(struct vfio_cdx_device *vdev)
+{
+}
+#endif
 
 #endif /* VFIO_CDX_PRIVATE_H */
-- 
2.34.1