pci: Introduce pci_find_present

This works like pci_dev_present but instead of returning boolean returns
the matching pci_device_id entry.  This makes it much more useful.  Code
bloat is basically nil as the old boolean function is rewritten in terms of
the new one.

This will be used by the updated VIA PCI quirks for one

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/pci/search.c b/drivers/pci/search.c
index 2f13eba5d5aebf9c7a9f0930cbc1022bde441f75..2bbafe0f79b1fc4309ac75ee656619bd56847f6f 100644 (file)
--- a/drivers/pci/search.c
+++ b/drivers/pci/search.c
@@ -413,6 +413,24 @@ exit:
        return dev;
 }
 
+const struct pci_device_id *pci_find_present(const struct pci_device_id *ids)
+{
+       struct pci_dev *dev;
+       struct pci_device_id * found = NULL;
+
+       WARN_ON(in_interrupt());
+       down_read(&pci_bus_sem);
+       while (ids->vendor || ids->subvendor || ids->class_mask) {
+               list_for_each_entry(dev, &pci_devices, global_list) {
+                       if ((found = pci_match_one_device(ids, dev)) != NULL)
+                               break;
+               }
+               ids++;
+       }
+       up_read(&pci_bus_sem);
+       return found;
+}
+
 /**
  * pci_dev_present - Returns 1 if device matching the device list is present, 0 if not.
  * @ids: A pointer to a null terminated list of struct pci_device_id structures
@@ -424,27 +442,14 @@ exit:
  * find devices that are usually built into a system, or for a general hint as
  * to if another device happens to be present at this specific moment in time.
  */
+
 int pci_dev_present(const struct pci_device_id *ids)
 {
-       struct pci_dev *dev;
-       int found = 0;
-
-       WARN_ON(in_interrupt());
-       down_read(&pci_bus_sem);
-       while (ids->vendor || ids->subvendor || ids->class_mask) {
-               list_for_each_entry(dev, &pci_devices, global_list) {
-                       if (pci_match_one_device(ids, dev)) {
-                               found = 1;
-                               goto exit;
-                       }
-               }
-               ids++;
-       }
-exit:
-       up_read(&pci_bus_sem);
-       return found;
+       return pci_find_present(ids) == NULL ? 0 : 1;
 }
+
 EXPORT_SYMBOL(pci_dev_present);
+EXPORT_SYMBOL(pci_find_present);
 
 EXPORT_SYMBOL(pci_find_device);
 EXPORT_SYMBOL(pci_find_device_reverse);

diff --git a/include/linux/pci.h b/include/linux/pci.h
index 01c707261f9ce6f9b42d03c62f622351100f82df..769e132b78d38fc365077b4079377a807d191ba4 100644 (file)
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -468,6 +468,7 @@ struct pci_dev *pci_get_slot (struct pci_bus *bus, unsigned int devfn);
 struct pci_dev *pci_get_bus_and_slot (unsigned int bus, unsigned int devfn);
 struct pci_dev *pci_get_class (unsigned int class, struct pci_dev *from);
 int pci_dev_present(const struct pci_device_id *ids);
+const struct pci_device_id *pci_find_present(const struct pci_device_id *ids);
 
 int pci_bus_read_config_byte (struct pci_bus *bus, unsigned int devfn, int where, u8 *val);
 int pci_bus_read_config_word (struct pci_bus *bus, unsigned int devfn, int where, u16 *val);
@@ -681,6 +682,7 @@ static inline struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *
 { return NULL; }
 
 #define pci_dev_present(ids)   (0)
+#define pci_find_present(ids)  (NULL)
 #define pci_dev_put(dev)       do { } while (0)
 
 static inline void pci_set_master(struct pci_dev *dev) { }