lkml.org 
[lkml]   [2022]   [Jan]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH 5.15 707/846] PCI: pci-bridge-emul: Set PCI_STATUS_CAP_LIST for PCIe device
    Date
    From: Pali Rohár <pali@kernel.org>

    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>
    ---
    drivers/pci/pci-bridge-emul.c | 1 +
    1 file changed, 1 insertion(+)

    --- a/drivers/pci/pci-bridge-emul.c
    +++ b/drivers/pci/pci-bridge-emul.c
    @@ -296,6 +296,7 @@ int pci_bridge_emul_init(struct pci_brid

    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 =

    \
     
     \ /
      Last update: 2022-01-24 22:17    [W:4.043 / U:1.032 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site