Subject: [PATCH v3 21/22] PCI: Kill pci_find_next_bus

From: Yinghai Lu <[email-masked]>
Date: Sun, 27 Jan 2013 11:23:48 -0800

No user now, remove it.

That name is misleading as it only for root buses.

Signed-off-by: Yinghai Lu <[email-masked]>
Cc: Mauro Carvalho Chehab <[email-masked]>
Cc: Doug Thompson <[email-masked]>
Cc: [email-masked]
Cc: [email-masked]
Cc: David Airlie <[email-masked]>
Cc: [email-masked]
Cc: "David S. Miller" <[email-masked]>
Cc: [email-masked]
Cc: Tony Luck <[email-masked]>
Cc: Fenghua Yu <[email-masked]>
Cc: [email-masked]
Cc: [email-masked]
Cc: Richard Henderson <[email-masked]>
Cc: Ivan Kokshaysky <[email-masked]>
Cc: Matt Turner <[email-masked]>
Cc: [email-masked]
Cc: Russell King <[email-masked]>
Cc: [email-masked]
Cc: David Howells <[email-masked]>
Cc: Michal Simek <[email-masked]>
Cc: [email-masked]
Cc: Koichi Yasutake <[email-masked]>
Cc: [email-masked]
Cc: Benjamin Herrenschmidt <[email-masked]>
Cc: Paul Mackerras <[email-masked]>
Cc: [email-masked]
---
 drivers/pci/search.c |   37 +++++++------------------------------
 include/linux/pci.h  |    4 ----
 2 files changed, 7 insertions(+), 34 deletions(-)

diff --git a/drivers/pci/search.c b/drivers/pci/search.c
index db0c3a9..329c533 100644
--- a/drivers/pci/search.c
+++ b/drivers/pci/search.c
@@ -79,44 +79,22 @@ static struct pci_bus *pci_do_find_bus(struct pci_bus *bus, unsigned char busnr)
  */
 struct pci_bus * pci_find_bus(int domain, int busnr)
 {
-	struct pci_bus *bus = NULL;
+	struct pci_host_bridge *host_bridge = NULL;
 	struct pci_bus *tmp_bus;
 
-	while ((bus = pci_find_next_bus(bus)) != NULL)  {
-		if (pci_domain_nr(bus) != domain)
+	for_each_pci_host_bridge(host_bridge) {
+		if (pci_domain_nr(host_bridge->bus) != domain)
 			continue;
-		tmp_bus = pci_do_find_bus(bus, busnr);
-		if (tmp_bus)
+		tmp_bus = pci_do_find_bus(host_bridge->bus, busnr);
+		if (tmp_bus) {
+			put_device(&host_bridge->dev);
 			return tmp_bus;
+		}
 	}
 	return NULL;
 }
 
 /**
- * pci_find_next_bus - begin or continue searching for a PCI bus
- * @from: Previous PCI bus found, or %NULL for new search.
- *
- * Iterates through the list of known PCI busses.  A new search is
- * initiated by passing %NULL as the @from argument.  Otherwise if
- * @from is not %NULL, searches continue from next device on the
- * global list.
- */
-struct pci_bus * 
-pci_find_next_bus(const struct pci_bus *from)
-{
-	struct list_head *n;
-	struct pci_bus *b = NULL;
-
-	WARN_ON(in_interrupt());
-	down_read(&pci_bus_sem);
-	n = from ? from->node.next : pci_root_buses.next;
-	if (n != &pci_root_buses)
-		b = pci_bus_b(n);
-	up_read(&pci_bus_sem);
-	return b;
-}
-
-/**
  * pci_get_slot - locate PCI device for a given PCI slot
  * @bus: PCI bus on which desired PCI device resides
  * @devfn: encodes number of PCI slot in which the desired PCI 
@@ -356,7 +334,6 @@ EXPORT_SYMBOL(pci_dev_present);
 
 /* For boot time work */
 EXPORT_SYMBOL(pci_find_bus);
-EXPORT_SYMBOL(pci_find_next_bus);
 /* For everyone */
 EXPORT_SYMBOL(pci_get_device);
 EXPORT_SYMBOL(pci_get_subsys);
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 67879cb..bb07db2 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -763,7 +763,6 @@ int pci_find_ext_capability(struct pci_dev *dev, int cap);
 int pci_find_next_ext_capability(struct pci_dev *dev, int pos, int cap);
 int pci_find_ht_capability(struct pci_dev *dev, int ht_cap);
 int pci_find_next_ht_capability(struct pci_dev *dev, int pos, int ht_cap);
-struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
 
 struct pci_host_bridge *pci_get_next_host_bridge(struct pci_host_bridge *from);
 struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device,
@@ -1404,9 +1403,6 @@ static inline int pci_block_cfg_access_in_atomic(struct pci_dev *dev)
 static inline void pci_unblock_cfg_access(struct pci_dev *dev)
 { }
 
-static inline struct pci_bus *pci_find_next_bus(const struct pci_bus *from)
-{ return NULL; }
-
 static inline struct pci_dev *pci_get_slot(struct pci_bus *bus,
 						unsigned int devfn)
 { return NULL; }
-- 
1.7.10.4