From 3567a4edd6352239586470da1bd5834989425085 Mon Sep 17 00:00:00 2001 From: Niklas Cassel Date: Wed, 28 Mar 2018 13:50:09 +0200 Subject: [PATCH] PCI: endpoint: Setting 64-bit/prefetch bit is invalid when IO is set If flag PCI_BASE_ADDRESS_SPACE_IO is set, also having any PCI_BASE_ADDRESS_MEM_* bit set is invalid. 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 Signed-off-by: Lorenzo Pieralisi Acked-by: Kishon Vijay Abraham I --- drivers/pci/endpoint/pci-epc-core.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/pci/endpoint/pci-epc-core.c b/drivers/pci/endpoint/pci-epc-core.c index 109d75f0b7d2..40eea20d21f9 100644 --- a/drivers/pci/endpoint/pci-epc-core.c +++ b/drivers/pci/endpoint/pci-epc-core.c @@ -309,10 +309,13 @@ int pci_epc_set_bar(struct pci_epc *epc, u8 func_no, { int ret; unsigned long irq_flags; + int flags = epf_bar->flags; if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions || (epf_bar->barno == BAR_5 && - epf_bar->flags & PCI_BASE_ADDRESS_MEM_TYPE_64)) + flags & PCI_BASE_ADDRESS_MEM_TYPE_64) || + (flags & PCI_BASE_ADDRESS_SPACE_IO && + flags & PCI_BASE_ADDRESS_IO_MASK)) return -EINVAL; if (!epc->ops->set_bar)