From: Reinette Chatre reinette.chatre@intel.com
commit 195d8e5da3acb17c5357526494f818a21e97cd10 upstream.
pci_msix_can_alloc_dyn() is not declared when CONFIG_PCI_MSI is disabled.
There is no existing user of pci_msix_can_alloc_dyn() but work is in progress to change this. This work encounters the following error when CONFIG_PCI_MSI is disabled:
drivers/vfio/pci/vfio_pci_intrs.c:427:21: error: implicit declaration of function 'pci_msix_can_alloc_dyn' [-Werror=implicit-function-declaration]
Provide definition for pci_msix_can_alloc_dyn() in preparation for users that need to compile when CONFIG_PCI_MSI is disabled.
[bhelgaas: Also reported by Arnd Bergmann arnd@kernel.org in drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c; added his Fixes: line]
Fixes: fb0a6a268dcd ("net/mlx5: Provide external API for allocating vectors") Fixes: 34026364df8e ("PCI/MSI: Provide post-enable dynamic allocation interfaces for MSI-X") Link: https://lore.kernel.org/oe-kbuild-all/202303291000.PWFqGCxH-lkp@intel.com/ Link: https://lore.kernel.org/r/310ecc4815dae4174031062f525245f0755c70e2.168011992... Reported-by: kernel test robot lkp@intel.com Signed-off-by: Reinette Chatre reinette.chatre@intel.com Signed-off-by: Bjorn Helgaas bhelgaas@google.com Reviewed-by: Kuppuswamy Sathyanarayanan sathyanarayanan.kuppuswamy@linux.intel.com Cc: stable@vger.kernel.org # v6.2+ Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- include/linux/pci.h | 2 ++ 1 file changed, 2 insertions(+)
--- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1623,6 +1623,8 @@ pci_alloc_irq_vectors(struct pci_dev *de flags, NULL); }
+static inline bool pci_msix_can_alloc_dyn(struct pci_dev *dev) +{ return false; } static inline struct msi_map pci_msix_alloc_irq_at(struct pci_dev *dev, unsigned int index, const struct irq_affinity_desc *affdesc) {