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>

1 files changed, 22 insertions, 17 deletions

diff --git a/drivers/pci/search.c b/drivers/pci/search.c
index 2f13eba5d5ae..2bbafe0f79b1 100644
--- 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);