On 11/05/2015 12:12 AM, Gavin Shan wrote:
This renames traverse_pci_devices() to pci_traverse_device_nodes().
Why? pci_traverse_device_nodes() is not moved to some more generic header
where is would be required to have a standard prefix. And the ppc-pci.h
header does not use any standard prefix so the point of renaming is unclear.
traverse_pci_dn() is still there and it has "traverse", "pci" and "device
node" (abbreviated as "dn") in it so pci_traverse_device_nodes is more
confusing name than traverse_pci_devices. Cannot we just get rid of one of
them?
Also the subject line says "Export" but nothing gets exported in this patch
- the visibility of pci_traverse_device_nodes() remains unchanged.
The function traverses all subordinate device nodes of the specified
one. Also, below cleanup applied to the function. No logical changes
introduced.
* Rename "pre" to "fn".
* Avoid assignment in if condition reported from checkpatch.pl.
Signed-off-by: Gavin Shan <gwshan@xxxxxxxxxxxxxxxxxx>
---
arch/powerpc/include/asm/ppc-pci.h | 6 +++---
arch/powerpc/kernel/pci_dn.c | 14 +++++++++-----
arch/powerpc/platforms/pseries/msi.c | 4 ++--
3 files changed, 14 insertions(+), 10 deletions(-)
diff --git a/arch/powerpc/include/asm/ppc-pci.h b/arch/powerpc/include/asm/ppc-pci.h
index ca0c5bf..8753e4e 100644
--- a/arch/powerpc/include/asm/ppc-pci.h
+++ b/arch/powerpc/include/asm/ppc-pci.h
@@ -33,9 +33,9 @@ extern struct pci_dev *isa_bridge_pcidev; /* may be NULL if no ISA bus */
struct device_node;
struct pci_dn;
-typedef void *(*traverse_func)(struct device_node *me, void *data);
-void *traverse_pci_devices(struct device_node *start, traverse_func pre,
- void *data);
+void *pci_traverse_device_nodes(struct device_node *start,
+ void *(*fn)(struct device_node *, void *),
+ void *data);
void *traverse_pci_dn(struct pci_dn *root,
void *(*fn)(struct pci_dn *, void *),
void *data);
diff --git a/arch/powerpc/kernel/pci_dn.c b/arch/powerpc/kernel/pci_dn.c
index 7f877a4..aa4110f 100644
--- a/arch/powerpc/kernel/pci_dn.c
+++ b/arch/powerpc/kernel/pci_dn.c
@@ -355,8 +355,9 @@ EXPORT_SYMBOL_GPL(pci_remove_device_node_info);
* one of these nodes we also assume its siblings are non-pci for
* performance.
*/
-void *traverse_pci_devices(struct device_node *start, traverse_func pre,
- void *data)
+void *pci_traverse_device_nodes(struct device_node *start,
+ void *(*fn)(struct device_node *, void *),
+ void *data)
{
struct device_node *dn, *nextdn;
void *ret;
@@ -371,8 +372,11 @@ void *traverse_pci_devices(struct device_node *start, traverse_func pre,
if (classp)
class = of_read_number(classp, 1);
- if (pre && ((ret = pre(dn, data)) != NULL))
- return ret;
+ if (fn) {
+ ret = fn(dn, data);
+ if (ret)
+ return ret;
+ }
/* If we are a PCI bridge, go down */
if (dn->child && ((class >> 8) == PCI_CLASS_BRIDGE_PCI ||
@@ -470,7 +474,7 @@ void pci_devs_phb_init_dynamic(struct pci_controller *phb)
}
/* Update dn->phb ptrs for new phb and children devices */
- traverse_pci_devices(dn, add_pdn, phb);
+ pci_traverse_device_nodes(dn, add_pdn, phb);
}
/**
diff --git a/arch/powerpc/platforms/pseries/msi.c b/arch/powerpc/platforms/pseries/msi.c
index 272e9ec..543a638 100644
--- a/arch/powerpc/platforms/pseries/msi.c
+++ b/arch/powerpc/platforms/pseries/msi.c
@@ -305,7 +305,7 @@ static int msi_quota_for_device(struct pci_dev *dev, int request)
memset(&counts, 0, sizeof(struct msi_counts));
/* Work out how many devices we have below this PE */
- traverse_pci_devices(pe_dn, count_non_bridge_devices, &counts);
+ pci_traverse_device_nodes(pe_dn, count_non_bridge_devices, &counts);
if (counts.num_devices == 0) {
pr_err("rtas_msi: found 0 devices under PE for %s\n",
@@ -320,7 +320,7 @@ static int msi_quota_for_device(struct pci_dev *dev, int request)
/* else, we have some more calculating to do */
counts.requestor = pci_device_to_OF_node(dev);
counts.request = request;
- traverse_pci_devices(pe_dn, count_spare_msis, &counts);
+ pci_traverse_device_nodes(pe_dn, count_spare_msis, &counts);
/* If the quota isn't an integer multiple of the total, we can
* use the remainder as spare MSIs for anyone that wants them. */
--
Alexey
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