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PCI: Allow hotplug service drivers to operate in polling mode

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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>
This commit is contained in:
Rajat Jain 2014-03-31 16:51:23 -07:00 committed by Bjorn Helgaas
parent 476a357fd9
commit 374a914043
1 changed files with 4 additions and 1 deletions
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5
drivers/pci/pcie/portdrv_core.c
View file

@ -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;
}