From d1a313e4b6ccbb61c746ee10ac198970516e9afc Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Tue, 29 Apr 2014 18:33:09 -0600 Subject: [PATCH] PCI: Reject BAR above 4GB if dma_addr_t is too small We can only handle BARs above 4GB if dma_addr_t (not resource_size_t) is 64 bits wide. If we have a 64-bit resource_size_t and a 32-bit dma_addr_t, we can't deal with BARs above 4GB. Signed-off-by: Bjorn Helgaas --- drivers/pci/probe.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index c7f8b717c2e7..afae3bf405fa 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -253,7 +253,7 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type, goto out; } - if ((sizeof(resource_size_t) < 8) && l) { + if ((sizeof(dma_addr_t) < 8) && l) { /* Address above 32-bit boundary; disable the BAR */ pci_write_config_dword(dev, pos, 0); pci_write_config_dword(dev, pos + 4, 0);