diff options
| author | Aleksandr Bezzubikov <zuban32s@gmail.com> | 2017-07-18 17:12:25 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-09-27 14:39:23 +0200 |
| commit | 998a9f51bc74933713b6308b676b941c7b1ce3aa (patch) | |
| tree | 999ac5d6df3f5a1b3f76a6e6725acc40c6ec0fc0 /drivers/pci | |
| parent | 57e4f87ebe4682a1f5a78f0c2ffe49e874bd49df (diff) | |
PCI: shpchp: Enable bridge bus mastering if MSI is enabled
commit 48b79a14505349a29b3e20f03619ada9b33c4b17 upstream.
An SHPC may generate MSIs to notify software about slot or controller
events (SHPC spec r1.0, sec 4.7). A PCI device can only generate an MSI if
it has bus mastering enabled.
Enable bus mastering if the bridge contains an SHPC that uses MSI for event
notifications.
Signed-off-by: Aleksandr Bezzubikov <zuban32s@gmail.com>
[bhelgaas: changelog]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Marcel Apfelbaum <marcel@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/hotplug/shpchp_hpc.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/pci/hotplug/shpchp_hpc.c b/drivers/pci/hotplug/shpchp_hpc.c index de0ea474fb73..e5824c7b7b6b 100644 --- a/drivers/pci/hotplug/shpchp_hpc.c +++ b/drivers/pci/hotplug/shpchp_hpc.c @@ -1062,6 +1062,8 @@ int shpc_init(struct controller *ctrl, struct pci_dev *pdev) if (rc) { ctrl_info(ctrl, "Can't get msi for the hotplug controller\n"); ctrl_info(ctrl, "Use INTx for the hotplug controller\n"); + } else { + pci_set_master(pdev); } rc = request_irq(ctrl->pci_dev->irq, shpc_isr, IRQF_SHARED, |