From f25b5fae29d4e5fe6ae17d3f898a959d72519b6a Mon Sep 17 00:00:00 2001 From: Niklas Cassel <niklas.cassel@axis.com> Date: Wed, 28 Mar 2018 13:50:10 +0200 Subject: [PATCH] PCI: endpoint: Setting a BAR size > 4 GB is invalid if 64-bit flag is not set Setting a BAR size > 4 GB is invalid if PCI_BASE_ADDRESS_MEM_TYPE_64 flag is not set. This sanity check is done in pci_epc_set_bar(), so that we don't need to do this sanity check in all epc->ops->set_bar() implementations. Signed-off-by: Niklas Cassel <niklas.cassel@axis.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Acked-by: Kishon Vijay Abraham I <kishon@ti.com> --- drivers/pci/endpoint/pci-epc-core.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/pci/endpoint/pci-epc-core.c b/drivers/pci/endpoint/pci-epc-core.c index 40eea20d21f9f..8637822605ff6 100644 --- a/drivers/pci/endpoint/pci-epc-core.c +++ b/drivers/pci/endpoint/pci-epc-core.c @@ -315,7 +315,9 @@ int pci_epc_set_bar(struct pci_epc *epc, u8 func_no, (epf_bar->barno == BAR_5 && flags & PCI_BASE_ADDRESS_MEM_TYPE_64) || (flags & PCI_BASE_ADDRESS_SPACE_IO && - flags & PCI_BASE_ADDRESS_IO_MASK)) + flags & PCI_BASE_ADDRESS_IO_MASK) || + (upper_32_bits(epf_bar->size) && + !(flags & PCI_BASE_ADDRESS_MEM_TYPE_64))) return -EINVAL; if (!epc->ops->set_bar) -- 2.30.2