From: Pali Rohár pali@kernel.org
[ Upstream commit 2cf150216e5b5619d7c25180ccf2cc8ac7bebc13 ]
PCI IO type bits are already initialized in mvebu_pci_bridge_emul_init() function and only when IO support is enabled. These type bits are read-only and pci-bridge-emul.c code already does not allow to modify them from upper layers.
When IO support is disabled then all IO registers should be read-only and return zeros. Therefore do not modify PCI IO type bits in mvebu_pci_bridge_emul_base_conf_write() callback.
Link: https://lore.kernel.org/r/20211125124605.25915-8-pali@kernel.org Fixes: 1f08673eef12 ("PCI: mvebu: Convert to PCI emulated bridge config space") Signed-off-by: Pali Rohár pali@kernel.org Signed-off-by: Lorenzo Pieralisi lorenzo.pieralisi@arm.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/pci/controller/pci-mvebu.c | 7 ------- 1 file changed, 7 deletions(-)
diff --git a/drivers/pci/controller/pci-mvebu.c b/drivers/pci/controller/pci-mvebu.c index f4971fc72a772..5d5f23b1d355b 100644 --- a/drivers/pci/controller/pci-mvebu.c +++ b/drivers/pci/controller/pci-mvebu.c @@ -497,13 +497,6 @@ mvebu_pci_bridge_emul_base_conf_write(struct pci_bridge_emul *bridge, }
case PCI_IO_BASE: - /* - * We keep bit 1 set, it is a read-only bit that - * indicates we support 32 bits addressing for the - * I/O - */ - conf->iobase |= PCI_IO_RANGE_TYPE_32; - conf->iolimit |= PCI_IO_RANGE_TYPE_32; mvebu_pcie_handle_iobase_change(port); break;