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authorRajat Jain <rajatxjain@gmail.com>2014-03-31 23:51:23 (GMT)
committerBjorn Helgaas <bhelgaas@google.com>2014-04-24 22:47:46 (GMT)
commit374a91404314cef882b27b293dd34d89e2a3c0b6 (patch)
tree0cb20186a319974c787d5271abec960b3dcb8e62 /drivers/pci/pcie
parent476a357fd9045a4c91faa055fadabf550aedb8c5 (diff)
downloadlinux-374a91404314cef882b27b293dd34d89e2a3c0b6.tar.xz
PCI: Allow hotplug service drivers to operate in polling mode
Today the PCIe port bus driver disables the Hot-plug service if the port device does not have the capability to generate interrupts. However, a user must be able to use the "pciehp_poll_mode" parameter to use the pciehp in polling method in such a case. Today it is not possible. This patch allows a hotplug service driver to decide whether or not it would like to continue in the absence of interrupts. Signed-off-by: Rajat Jain <rajatxjain@gmail.com> Signed-off-by: Rajat Jain <rajatjain@juniper.net> Signed-off-by: Guenter Roeck <groeck@juniper.net> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/pcie')
-rw-r--r--drivers/pci/pcie/portdrv_core.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/pci/pcie/portdrv_core.c b/drivers/pci/pcie/portdrv_core.c
index 986f8ea..f6503ad 100644
--- a/drivers/pci/pcie/portdrv_core.c
+++ b/drivers/pci/pcie/portdrv_core.c
@@ -379,10 +379,13 @@ int pcie_port_device_register(struct pci_dev *dev)
/*
* Initialize service irqs. Don't use service devices that
* require interrupts if there is no way to generate them.
+ * However, some drivers may have a polling mode (e.g. pciehp_poll_mode)
+ * that can be used in the absence of irqs. Allow them to determine
+ * if that is to be used.
*/
status = init_service_irqs(dev, irqs, capabilities);
if (status) {
- capabilities &= PCIE_PORT_SERVICE_VC;
+ capabilities &= PCIE_PORT_SERVICE_VC | PCIE_PORT_SERVICE_HP;
if (!capabilities)
goto error_disable;
}