implementation of pci_find_subsys for old kernels from abbotti@mev.co.uk (Ian Abbott),

and #defines for pci_get_subsys() and pci_dev_put() from me.

diff --git a/include/linux/pci.h b/include/linux/pci.h
index b4edba12045173488c8fe03a2532602d6d124b29..828a0469547bf89e0cf87783d99b016cf95c01e7 100644 (file)
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -142,15 +142,35 @@ static inline void pci_release_regions(struct pci_dev *dev)
        }
 }
 
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,3,15)
 static inline struct pci_dev* pci_find_subsys( unsigned int vendor, unsigned int device,
        unsigned int ss_vendor, unsigned int ss_device,
        const struct pci_dev *from)
 {
-       rt_printk( "pci_find_subsys() not supported in kernels older than 2.4!\n" );
-       return NULL;
+       struct pci_dev *dev = (struct pci_dev *)from;   /* ignore const */
+
+       while((dev=pci_find_device(vendor,device,dev))!=NULL){
+               if(ss_vendor!=PCI_ANY_ID){
+                       u16 temp;
+                       pci_read_config_word(dev,PCI_SUBSYSTEM_VENDOR_ID,&temp);
+                       if(ss_vendor!=temp){
+                               continue;
+                       }
+               }
+               if(ss_device!=PCI_ANY_ID){
+                       u16 temp;
+                       pci_read_config_word(dev,PCI_SUBSYSTEM_ID,&temp);
+                       if(ss_device!=temp){
+                               continue;
+                       }
+               }
+               break;  /* match */
+       }
+       return dev;
 }
-
-#endif
+#endif // <2.3.15
 
 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,2,14)
 static inline void pci_set_master(struct pci_dev *dev)
@@ -162,6 +182,11 @@ static inline unsigned long pci_resource_len (struct pci_dev *dev, int n_base)
 { return 0; }
 #endif // 2.2.18
 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
+#define pci_get_subsys pci_find_subsys
+#define pci_dev_put(x)
+#endif
+
 #endif
 
 #endif /* _COMPAT_PCI_H */