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authorNiklas Cassel <niklas.cassel@axis.com>2018-03-28 14:50:09 +0300
committerLorenzo Pieralisi <lorenzo.pieralisi@arm.com>2018-04-03 14:23:52 +0300
commit3567a4edd6352239586470da1bd5834989425085 (patch)
treeeaea11b533ae62882a7d4a7c92b7250266fe1b34 /drivers/pci
parentf16b1f6fdf631213428ff115ae49ea70c9ac4f2d (diff)
downloadlinux-3567a4edd6352239586470da1bd5834989425085.tar.xz
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 <niklas.cassel@axis.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/endpoint/pci-epc-core.c5
1 files changed, 4 insertions, 1 deletions
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)