iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

PCI: pci-bridge-emul: Set PCI_STATUS_CAP_LIST for PCIe device

Browse Source 
commit 3be9d243b21724d49b65043d4520d688b6040b36 upstream.

Since all PCI Express device Functions are required to implement the PCI
Express Capability structure, Capabilities List bit in PCI Status Register
must be hardwired to 1b. Capabilities Pointer register (which is already
set by pci-bride-emul.c driver) is valid only when Capabilities List is set
to 1b.

Link: https://lore.kernel.org/r/20211124155944.1290-7-pali@kernel.org
Fixes: 23a5fba4d941 ("PCI: Introduce PCI bridge emulated config space common logic")
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Pali Rohár 2021-11-24 16:59:44 +01:00 committed by Greg Kroah-Hartman
parent e904b46073
commit 09af149541
1 changed files with 1 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/pci/pci-bridge-emul.c
View File

@ -287,6 +287,7 @@ int pci_bridge_emul_init(struct pci_bridge_emul *bridge,
if (bridge->has_pcie) {
bridge->conf.capabilities_pointer = PCI_CAP_PCIE_START;
bridge->conf.status |= cpu_to_le16(PCI_STATUS_CAP_LIST);
bridge->pcie_conf.cap_id = PCI_CAP_ID_EXP;
bridge->pcie_conf.cap |= cpu_to_le16(PCI_EXP_TYPE_ROOT_PORT << 4);
bridge->pcie_cap_regs_behavior =