From c83bd900aac38552b0d903588bbb084d3b26fe71 Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Wed, 26 Feb 2014 11:26:00 -0700 Subject: [PATCH] PCI: Mark 64-bit resource as IORESOURCE_UNSET if we only support 32-bit If we don't support 64-bit addresses, i.e., CONFIG_PHYS_ADDR_T_64BIT is not set, we can't deal with BARs above 4GB. In this case we already pretend the BAR contained zero; this patch also sets IORESOURCE_UNSET so we can try to reallocate it later. I don't think this is exactly correct: what we care about here are *bus* addresses, not CPU addresses, so the tests of sizeof(resource_size_t) probably should be on sizeof(dma_addr_t) instead. But this is what's been in -next, so we'll fix that later. Signed-off-by: Bjorn Helgaas --- drivers/pci/probe.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 6e34498ec9f0..78335efbbb74 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -252,6 +252,7 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type, /* Address above 32-bit boundary; disable the BAR */ pci_write_config_dword(dev, pos, 0); pci_write_config_dword(dev, pos + 4, 0); + res->flags |= IORESOURCE_UNSET; region.start = 0; region.end = sz64; bar_disabled = true; -- 2.34.1