[PATCH 5/5 v3] PCI: code and comments cleanup

From: Ram Pai
Date: Mon Jul 25 2011 - 16:11:09 EST

a) adjust_resource_sorted() is now called reassign_resource_sorted()
b) nice-to-have is now called optional
c) add_list is now called realloc_list.

Signed-off-by: Ram Pai <linuxram@xxxxxxxxxx>
---
drivers/pci/setup-bus.c | 110 +++++++++++++++++++++++-----------------------
1 files changed, 55 insertions(+), 55 deletions(-)

diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index 6775d5f..f6616cb 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -125,18 +125,18 @@ static inline void reset_resource(struct resource *res)
}

/**
- * adjust_resources_sorted() - satisfy any additional resource requests
+ * reassign_resources_sorted() - satisfy any additional resource requests
*
- * @add_head : head of the list tracking requests requiring additional
+ * @realloc_head : head of the list tracking requests requiring additional
* resources
* @head : head of the list tracking requests with allocated
* resources
*
- * Walk through each element of the add_head and try to procure
+ * Walk through each element of the realloc_head and try to procure
* additional resources for the element, provided the element
* is in the head list.
*/
-static void adjust_resources_sorted(struct resource_list_x *add_head,
+static void reassign_resources_sorted(struct resource_list_x *realloc_head,
struct resource_list *head)
{
struct resource *res;
@@ -145,8 +145,8 @@ static void adjust_resources_sorted(struct resource_list_x *add_head,
resource_size_t add_size;
int idx;

- prev = add_head;
- for (list = add_head->next; list;) {
+ prev = realloc_head;
+ for (list = realloc_head->next; list;) {
res = list->res;
/* skip resource that has been reset */
if (!res->flags)
@@ -218,7 +218,7 @@ static void assign_requested_resources_sorted(struct resource_list *head,
}

static void __assign_resources_sorted(struct resource_list *head,
- struct resource_list_x *add_head,
+ struct resource_list_x *realloc_head,
struct resource_list_x *fail_head)
{
/* Satisfy the must-have resource requests */
@@ -226,8 +226,8 @@ static void __assign_resources_sorted(struct resource_list *head,

/* Try to satisfy any additional optional resource
requests */
- if (add_head)
- adjust_resources_sorted(add_head, head);
+ if (realloc_head)
+ reassign_resources_sorted(realloc_head, head);
free_list(resource_list, head);
}

@@ -243,7 +243,7 @@ static void pdev_assign_resources_sorted(struct pci_dev *dev,
}

static void pbus_assign_resources_sorted(const struct pci_bus *bus,
- struct resource_list_x *add_head,
+ struct resource_list_x *realloc_head,
struct resource_list_x *fail_head)
{
struct pci_dev *dev;
@@ -253,7 +253,7 @@ static void pbus_assign_resources_sorted(const struct pci_bus *bus,
list_for_each_entry(dev, &bus->devices, bus_list)
__dev_sort_resources(dev, &head);

- __assign_resources_sorted(&head, add_head, fail_head);
+ __assign_resources_sorted(&head, realloc_head, fail_head);
}

void pci_setup_cardbus(struct pci_bus *bus)
@@ -551,13 +551,13 @@ static resource_size_t calculate_memsize(resource_size_t size,
return size;
}

-static resource_size_t get_res_add_size(struct resource_list_x *add_head,
+static resource_size_t get_res_add_size(struct resource_list_x *realloc_head,
struct resource *res)
{
struct resource_list_x *list;

- /* check if it is in add_head list */
- for (list = add_head->next; list && list->res != res;
+ /* check if it is in realloc_head list */
+ for (list = realloc_head->next; list && list->res != res;
list = list->next);
if (list)
return list->add_size;
@@ -571,7 +571,7 @@ static resource_size_t get_res_add_size(struct resource_list_x *add_head,
* @bus : the bus
* @min_size : the minimum io window that must to be allocated
* @add_size : additional optional io window
- * @add_head : track the additional io window on this list
+ * @realloc_head : track the additional io window on this list
*
* Sizing the IO windows of the PCI-PCI bridge is trivial,
* since these windows have 4K granularity and the IO ranges
@@ -579,7 +579,7 @@ static resource_size_t get_res_add_size(struct resource_list_x *add_head,
* We must be careful with the ISA aliasing though.
*/
static void pbus_size_io(struct pci_bus *bus, resource_size_t min_size,
- resource_size_t add_size, struct resource_list_x *add_head)
+ resource_size_t add_size, struct resource_list_x *realloc_head)
{
struct pci_dev *dev;
struct resource *b_res = find_free_bus_resource(bus, IORESOURCE_IO);
@@ -606,15 +606,15 @@ static void pbus_size_io(struct pci_bus *bus, resource_size_t min_size,
else
size1 += r_size;

- if (add_head)
- children_add_size += get_res_add_size(add_head, r);
+ if (realloc_head)
+ children_add_size += get_res_add_size(realloc_head, r);
}
}
size0 = calculate_iosize(size, min_size, size1,
resource_size(b_res), 4096);
if (children_add_size > add_size)
add_size = children_add_size;
- size1 = (!add_head || (add_head && !add_size)) ? size0 :
+ size1 = (!realloc_head || (realloc_head && !add_size)) ? size0 :
calculate_iosize(size, min_size+add_size, size1,
resource_size(b_res), 4096);
if (!size0 && !size1) {
@@ -629,8 +629,8 @@ static void pbus_size_io(struct pci_bus *bus, resource_size_t min_size,
b_res->start = 4096;
b_res->end = b_res->start + size0 - 1;
b_res->flags |= IORESOURCE_STARTALIGN;
- if (size1 > size0 && add_head)
- add_to_list(add_head, bus->self, b_res, size1-size0, 4096);
+ if (size1 > size0 && realloc_head)
+ add_to_list(realloc_head, bus->self, b_res, size1-size0, 4096);
}

/**
@@ -639,7 +639,7 @@ static void pbus_size_io(struct pci_bus *bus, resource_size_t min_size,
* @bus : the bus
* @min_size : the minimum memory window that must to be allocated
* @add_size : additional optional memory window
- * @add_head : track the additional memory window on this list
+ * @realloc_head : track the additional memory window on this list
*
* Calculate the size of the bus and minimal alignment which
* guarantees that all child resources fit in this size.
@@ -647,7 +647,7 @@ static void pbus_size_io(struct pci_bus *bus, resource_size_t min_size,
static int pbus_size_mem(struct pci_bus *bus, unsigned long mask,
unsigned long type, resource_size_t min_size,
resource_size_t add_size,
- struct resource_list_x *add_head)
+ struct resource_list_x *realloc_head)
{
struct pci_dev *dev;
resource_size_t min_align, align, size, size0, size1;
@@ -679,10 +679,10 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask,
r_size = resource_size(r);
#ifdef CONFIG_PCI_IOV
/* put SRIOV requested res to the optional list */
- if (add_head && i >= PCI_IOV_RESOURCES &&
+ if (realloc_head && i >= PCI_IOV_RESOURCES &&
i <= PCI_IOV_RESOURCE_END) {
r->end = r->start - 1;
- add_to_list(add_head, dev, r, r_size, 0/* dont' care */);
+ add_to_list(realloc_head, dev, r, r_size, 0/* dont' care */);
children_add_size += r_size;
continue;
}
@@ -708,8 +708,8 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask,
max_order = order;
mem64_mask &= r->flags & IORESOURCE_MEM_64;

- if (add_head)
- children_add_size += get_res_add_size(add_head, r);
+ if (realloc_head)
+ children_add_size += get_res_add_size(realloc_head, r);
}
}
align = 0;
@@ -728,7 +728,7 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask,
size0 = calculate_memsize(size, min_size, 0, resource_size(b_res), min_align);
if (children_add_size > add_size)
add_size = children_add_size;
- size1 = (!add_head || (add_head && !add_size)) ? size0 :
+ size1 = (!realloc_head || (realloc_head && !add_size)) ? size0 :
calculate_memsize(size, min_size+add_size, 0,
resource_size(b_res), min_align);
if (!size0 && !size1) {
@@ -742,8 +742,8 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask,
b_res->start = min_align;
b_res->end = size0 + min_align - 1;
b_res->flags |= IORESOURCE_STARTALIGN | mem64_mask;
- if (size1 > size0 && add_head)
- add_to_list(add_head, bus->self, b_res, size1-size0, min_align);
+ if (size1 > size0 && realloc_head)
+ add_to_list(realloc_head, bus->self, b_res, size1-size0, min_align);
return 1;
}

@@ -757,7 +757,7 @@ unsigned long pci_cardbus_resource_alignment(struct resource *res)
}

static void pci_bus_size_cardbus(struct pci_bus *bus,
- struct resource_list_x *add_head)
+ struct resource_list_x *realloc_head)
{
struct pci_dev *bridge = bus->self;
struct resource *b_res = &bridge->resource[PCI_BRIDGE_RESOURCES];
@@ -769,13 +769,13 @@ static void pci_bus_size_cardbus(struct pci_bus *bus,
*/
b_res[0].start = 0;
b_res[0].flags |= IORESOURCE_IO | IORESOURCE_SIZEALIGN;
- if (add_head)
- add_to_list(add_head, bridge, b_res, pci_cardbus_io_size, 0 /* dont care */);
+ if (realloc_head)
+ add_to_list(realloc_head, bridge, b_res, pci_cardbus_io_size, 0 /* dont care */);

b_res[1].start = 0;
b_res[1].flags |= IORESOURCE_IO | IORESOURCE_SIZEALIGN;
- if (add_head)
- add_to_list(add_head, bridge, b_res+1, pci_cardbus_io_size, 0 /* dont care */);
+ if (realloc_head)
+ add_to_list(realloc_head, bridge, b_res+1, pci_cardbus_io_size, 0 /* dont care */);

/*
* Check whether prefetchable memory is supported
@@ -796,18 +796,18 @@ static void pci_bus_size_cardbus(struct pci_bus *bus,
if (ctrl & PCI_CB_BRIDGE_CTL_PREFETCH_MEM0) {
b_res[2].start = 0;
b_res[2].flags |= IORESOURCE_MEM | IORESOURCE_PREFETCH | IORESOURCE_SIZEALIGN;
- if (add_head)
- add_to_list(add_head, bridge, b_res+2, pci_cardbus_mem_size, 0 /* dont care */);
+ if (realloc_head)
+ add_to_list(realloc_head, bridge, b_res+2, pci_cardbus_mem_size, 0 /* dont care */);

b_res[3].start = 0;
b_res[3].flags |= IORESOURCE_MEM | IORESOURCE_SIZEALIGN;
- if (add_head)
- add_to_list(add_head, bridge, b_res+3, pci_cardbus_mem_size, 0 /* dont care */);
+ if (realloc_head)
+ add_to_list(realloc_head, bridge, b_res+3, pci_cardbus_mem_size, 0 /* dont care */);
} else {
b_res[3].start = 0;
b_res[3].flags |= IORESOURCE_MEM | IORESOURCE_SIZEALIGN;
- if (add_head)
- add_to_list(add_head, bridge, b_res+3, pci_cardbus_mem_size * 2, 0 /* dont care */);
+ if (realloc_head)
+ add_to_list(realloc_head, bridge, b_res+3, pci_cardbus_mem_size * 2, 0 /* dont care */);
}

/* set the size of the resource to zero, so that the resource does not
@@ -819,7 +819,7 @@ static void pci_bus_size_cardbus(struct pci_bus *bus,
}

void __ref __pci_bus_size_bridges(struct pci_bus *bus,
- struct resource_list_x *add_head)
+ struct resource_list_x *realloc_head)
{
struct pci_dev *dev;
unsigned long mask, prefmask;
@@ -832,12 +832,12 @@ void __ref __pci_bus_size_bridges(struct pci_bus *bus,

switch (dev->class >> 8) {
case PCI_CLASS_BRIDGE_CARDBUS:
- pci_bus_size_cardbus(b, add_head);
+ pci_bus_size_cardbus(b, realloc_head);
break;

case PCI_CLASS_BRIDGE_PCI:
default:
- __pci_bus_size_bridges(b, add_head);
+ __pci_bus_size_bridges(b, realloc_head);
break;
}
}
@@ -861,7 +861,7 @@ void __ref __pci_bus_size_bridges(struct pci_bus *bus,
* Follow thru
*/
default:
- pbus_size_io(bus, 0, additional_io_size, add_head);
+ pbus_size_io(bus, 0, additional_io_size, realloc_head);
/* If the bridge supports prefetchable range, size it
separately. If it doesn't, or its prefetchable window
has already been allocated by arch code, try
@@ -869,11 +869,11 @@ void __ref __pci_bus_size_bridges(struct pci_bus *bus,
resources. */
mask = IORESOURCE_MEM;
prefmask = IORESOURCE_MEM | IORESOURCE_PREFETCH;
- if (pbus_size_mem(bus, prefmask, prefmask, 0, additional_mem_size, add_head))
+ if (pbus_size_mem(bus, prefmask, prefmask, 0, additional_mem_size, realloc_head))
mask = prefmask; /* Success, size non-prefetch only. */
else
additional_mem_size += additional_mem_size;
- pbus_size_mem(bus, mask, IORESOURCE_MEM, 0, additional_mem_size, add_head);
+ pbus_size_mem(bus, mask, IORESOURCE_MEM, 0, additional_mem_size, realloc_head);
break;
}
}
@@ -885,20 +885,20 @@ void __ref pci_bus_size_bridges(struct pci_bus *bus)
EXPORT_SYMBOL(pci_bus_size_bridges);

static void __ref __pci_bus_assign_resources(const struct pci_bus *bus,
- struct resource_list_x *add_head,
+ struct resource_list_x *realloc_head,
struct resource_list_x *fail_head)
{
struct pci_bus *b;
struct pci_dev *dev;

- pbus_assign_resources_sorted(bus, add_head, fail_head);
+ pbus_assign_resources_sorted(bus, realloc_head, fail_head);

list_for_each_entry(dev, &bus->devices, bus_list) {
b = dev->subordinate;
if (!b)
continue;

- __pci_bus_assign_resources(b, add_head, fail_head);
+ __pci_bus_assign_resources(b, realloc_head, fail_head);

switch (dev->class >> 8) {
case PCI_CLASS_BRIDGE_PCI:
@@ -1108,7 +1108,7 @@ void __init
pci_assign_unassigned_resources(void)
{
struct pci_bus *bus;
- struct resource_list_x add_list; /* list of resources that
+ struct resource_list_x realloc_list; /* list of resources that
want additional resources */
int tried_times = 0;
enum release_type rel_type = leaf_only;
@@ -1121,7 +1121,7 @@ pci_assign_unassigned_resources(void)


head.next = NULL;
- add_list.next = NULL;
+ realloc_list.next = NULL;

pci_try_num = max_depth + 1;
printk(KERN_DEBUG "PCI: max bus depth: %d pci_try_num: %d\n",
@@ -1131,12 +1131,12 @@ again:
/* Depth first, calculate sizes and alignments of all
subordinate buses. */
list_for_each_entry(bus, &pci_root_buses, node)
- __pci_bus_size_bridges(bus, &add_list);
+ __pci_bus_size_bridges(bus, &realloc_list);

/* Depth last, allocate resources and update the hardware. */
list_for_each_entry(bus, &pci_root_buses, node)
- __pci_bus_assign_resources(bus, &add_list, &head);
- BUG_ON(add_list.next);
+ __pci_bus_assign_resources(bus, &realloc_list, &head);
+ BUG_ON(realloc_list.next);
tried_times++;

/* any device complain? */
--
1.7.4.1

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