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PCI: Simplify size1 assignment logic

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In pbus_size_io() and pbus_size_mem(), a complex ?: operation is performed
to set size1.  Decompose this so it's easier to read.

In the case of pbus_size_mem(), simply initializing size1 to zero ensures
the size1 checks work as expected.

Link: https://lore.kernel.org/r/20241216175632.4175-4-ilpo.jarvinen@linux.intel.com
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Xiaochun Lee <lixc17@lenovo.com>
This commit is contained in:
Ilpo Järvinen
2024-12-16 19:56:10 +02:00
committed by Bjorn Helgaas
parent 1f82b7e84a
commit a55bf64b30
1 changed files with 14 additions and 7 deletions
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21
drivers/pci/setup-bus.c
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@@ -927,9 +927,14 @@ static void pbus_size_io(struct pci_bus *bus, resource_size_t min_size,
size0 = calculate_iosize(size, min_size, size1, 0, 0,
resource_size(b_res), min_align);
size1 = (!realloc_head || (realloc_head && !add_size && !children_add_size)) ? size0 :
calculate_iosize(size, min_size, size1, add_size, children_add_size,
resource_size(b_res), min_align);
size1 = size0;
if (realloc_head && (add_size > 0 || children_add_size > 0)) {
size1 = calculate_iosize(size, min_size, size1, add_size,
children_add_size, resource_size(b_res),
min_align);
}
if (!size0 && !size1) {
if (bus->self && (b_res->start || b_res->end))
pci_info(bus->self, "disabling bridge window %pR to %pR (unused)\n",
@@ -1058,7 +1063,7 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask,
struct list_head *realloc_head)
{
struct pci_dev *dev;
resource_size_t min_align, win_align, align, size, size0, size1;
resource_size_t min_align, win_align, align, size, size0, size1 = 0;
resource_size_t aligns[24]; /* Alignments from 1MB to 8TB */
int order, max_order;
struct resource *b_res = find_bus_resource_of_type(bus,
@@ -1153,9 +1158,11 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask,
b_res, &bus->busn_res);
}
size1 = (!realloc_head || (realloc_head && !add_size && !children_add_size)) ? size0 :
calculate_memsize(size, min_size, add_size, children_add_size,
resource_size(b_res), add_align);
if (realloc_head && (add_size > 0 || children_add_size > 0)) {
size1 = calculate_memsize(size, min_size, add_size, children_add_size,
resource_size(b_res), add_align);
}
if (!size0 && !size1) {
if (bus->self && (b_res->start || b_res->end))
pci_info(bus->self, "disabling bridge window %pR to %pR (unused)\n",