PCI/MSI: Remove msi_desc_to_pci_sysdata()

Last user is gone long ago.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20211206210224.210768199@linutronix.de

drivers/pci/msi.c

@@ -1267,14 +1267,6 @@ struct pci_dev *msi_desc_to_pci_dev(struct msi_desc *desc)
 }
 EXPORT_SYMBOL(msi_desc_to_pci_dev);
 
-void *msi_desc_to_pci_sysdata(struct msi_desc *desc)
-{
-	struct pci_dev *dev = msi_desc_to_pci_dev(desc);
-
-	return dev->bus->sysdata;
-}
-EXPORT_SYMBOL_GPL(msi_desc_to_pci_sysdata);
-
 #ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
 /**
  * pci_msi_domain_write_msg - Helper to write MSI message to PCI config space

include/linux/msi.h

@@ -218,13 +218,8 @@ static inline void msi_desc_set_iommu_cookie(struct msi_desc *desc,
 	for_each_msi_entry((desc), &(pdev)->dev)
 
 struct pci_dev *msi_desc_to_pci_dev(struct msi_desc *desc);
-void *msi_desc_to_pci_sysdata(struct msi_desc *desc);
 void pci_write_msi_msg(unsigned int irq, struct msi_msg *msg);
 #else /* CONFIG_PCI_MSI */
-static inline void *msi_desc_to_pci_sysdata(struct msi_desc *desc)
-{
-	return NULL;
-}
 static inline void pci_write_msi_msg(unsigned int irq, struct msi_msg *msg)
 {
 }