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authorYinghai Lu <yinghai@kernel.org>2012-02-10 15:33:47 -0800
committerJesse Barnes <jbarnes@virtuousgeek.org>2012-02-23 11:59:56 -0800
commit1184893439b1a7532b579a85a354db12bbf1b277 (patch)
treecfba5be149def3389707a0773909d44c50b58f30 /drivers
parentdcef0d06b34a80071da4496556e85f9bf3b3c0bf (diff)
PCI: Fix "cardbus bridge resources as optional" size handling
We should not set the requested size to -2; that will confuse the resource list sorting with align when SIZEALIGN is used. Change to STARTALIGN and pass align from start; we are safe to do that just as we do that regular pci bridge. In the long run, we should just treat cardbus like a regular pci bridge. Also fix the case when realloc_head is not passed: we should keep the requested size. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Tested-by: Dominik Brodowski <linux@dominikbrodowski.net> Acked-by: Ram Pai <linuxram@us.ibm.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/pci/setup-bus.c65
1 files changed, 37 insertions, 28 deletions
diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index d5897c32f669..3b3932a6465f 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -898,21 +898,30 @@ static void pci_bus_size_cardbus(struct pci_bus *bus,
{
struct pci_dev *bridge = bus->self;
struct resource *b_res = &bridge->resource[PCI_BRIDGE_RESOURCES];
+ resource_size_t b_res_3_size = pci_cardbus_mem_size * 2;
u16 ctrl;
/*
* Reserve some resources for CardBus. We reserve
* a fixed amount of bus space for CardBus bridges.
*/
- b_res[0].start = 0;
- b_res[0].flags |= IORESOURCE_IO | IORESOURCE_SIZEALIGN;
- if (realloc_head)
- add_to_list(realloc_head, bridge, b_res, pci_cardbus_io_size, 0 /* dont care */);
+ b_res[0].start = pci_cardbus_io_size;
+ b_res[0].end = b_res[0].start + pci_cardbus_io_size - 1;
+ b_res[0].flags |= IORESOURCE_IO | IORESOURCE_STARTALIGN;
+ if (realloc_head) {
+ b_res[0].end -= pci_cardbus_io_size;
+ add_to_list(realloc_head, bridge, b_res, pci_cardbus_io_size,
+ pci_cardbus_io_size);
+ }
- b_res[1].start = 0;
- b_res[1].flags |= IORESOURCE_IO | IORESOURCE_SIZEALIGN;
- if (realloc_head)
- add_to_list(realloc_head, bridge, b_res+1, pci_cardbus_io_size, 0 /* dont care */);
+ b_res[1].start = pci_cardbus_io_size;
+ b_res[1].end = b_res[1].start + pci_cardbus_io_size - 1;
+ b_res[1].flags |= IORESOURCE_IO | IORESOURCE_STARTALIGN;
+ if (realloc_head) {
+ b_res[1].end -= pci_cardbus_io_size;
+ add_to_list(realloc_head, bridge, b_res+1, pci_cardbus_io_size,
+ pci_cardbus_io_size);
+ }
/* MEM1 must not be pref mmio */
pci_read_config_word(bridge, PCI_CB_BRIDGE_CONTROL, &ctrl);
@@ -939,28 +948,28 @@ static void pci_bus_size_cardbus(struct pci_bus *bus,
* twice the size.
*/
if (ctrl & PCI_CB_BRIDGE_CTL_PREFETCH_MEM0) {
- b_res[2].start = 0;
- b_res[2].flags |= IORESOURCE_MEM | IORESOURCE_PREFETCH | IORESOURCE_SIZEALIGN;
- 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 (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 (realloc_head)
- add_to_list(realloc_head, bridge, b_res+3, pci_cardbus_mem_size * 2, 0 /* dont care */);
+ b_res[2].start = pci_cardbus_mem_size;
+ b_res[2].end = b_res[2].start + pci_cardbus_mem_size - 1;
+ b_res[2].flags |= IORESOURCE_MEM | IORESOURCE_PREFETCH |
+ IORESOURCE_STARTALIGN;
+ if (realloc_head) {
+ b_res[2].end -= pci_cardbus_mem_size;
+ add_to_list(realloc_head, bridge, b_res+2,
+ pci_cardbus_mem_size, pci_cardbus_mem_size);
+ }
+
+ /* reduce that to half */
+ b_res_3_size = pci_cardbus_mem_size;
}
- /* set the size of the resource to zero, so that the resource does not
- * get assigned during required-resource allocation cycle but gets assigned
- * during the optional-resource allocation cycle.
- */
- b_res[0].start = b_res[1].start = b_res[2].start = b_res[3].start = 1;
- b_res[0].end = b_res[1].end = b_res[2].end = b_res[3].end = 0;
+ b_res[3].start = pci_cardbus_mem_size;
+ b_res[3].end = b_res[3].start + b_res_3_size - 1;
+ b_res[3].flags |= IORESOURCE_MEM | IORESOURCE_STARTALIGN;
+ if (realloc_head) {
+ b_res[3].end -= b_res_3_size;
+ add_to_list(realloc_head, bridge, b_res+3, b_res_3_size,
+ pci_cardbus_mem_size);
+ }
}
void __ref __pci_bus_size_bridges(struct pci_bus *bus,