vfio/cdx: update driver to build without CONFIG_GENERIC_MSI_IRQ

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@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202508070308.opy5dIFX-lkp@intel.com/
Reviewed-by: Nikhil Agarwal <nikhil.agarwal@amd.com>
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Nipun Gupta <nipun.gupta@amd.com>
Link: https://lore.kernel.org/r/20250826043852.2206008-2-nipun.gupta@amd.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>

diff --git a/drivers/vfio/cdx/Makefile b/drivers/vfio/cdx/Makefile
index df92b320122a4905d6aeb19088923c8f3d95fd0c..dadbef2419ea5b6262935783214abaa19be37f6e 100644 (file)
--- 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
+vfio-cdx-objs += intr.o
+endif

diff --git a/drivers/vfio/cdx/private.h b/drivers/vfio/cdx/private.h
index dc56729b3114aabe365bdd0b6309da1312b60cfb..172e48caa3a06274f0122d486ec757139772c048 100644 (file)
--- 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 -EINVAL;
+}
+
+static void vfio_cdx_irqs_cleanup(struct vfio_cdx_device *vdev)
+{
+}
+#endif
 
 #endif /* VFIO_CDX_PRIVATE_H */