e705c2959b
Jarod Wilson reports that ExpressCard hotplug doesn't work on HP ZBook G2. The problem turns out to be the ACPI-based "slot detection" code called from pciehp_probe() which uses questionable heuristics based on what ACPI objects are present for the PCIe port device to figure out whether to register a hotplug slot for that port. That code is used if there is at least one PCIe port having an ACPI device configuration object related to hotplug (such as _EJ0 or _RMV), and the Thunderbolt port on the ZBook has _RMV. Of course, Thunderbolt and PCIe native hotplug need not be mutually exclusive (as they aren't on the ZBook), so that rule is simply incorrect. Moreover, the ACPI-based "slot detection" check does not add any value if pciehp_probe() is called at all and the service type of the device object it has been called for is PCIE_PORT_SERVICE_HP, because PCIe hotplug services are only registered if the _OSC handshake in acpi_pci_root_add() allows the kernel to control the PCIe native hotplug feature. No more checks need to be carried out to decide whether or not to register a native PCIe hotlug slot in that case. For the above reasons, make pciehp_probe() check if it has been called for the right service type and drop the pointless ACPI-based "slot detection" check from it. Also remove the entire code whose only user is that check (the entire pciehp_acpi.c file goes away as a result) and drop function headers related to it from the internal pciehp header file. Link: http://lkml.kernel.org/r/1431632038-39917-1-git-send-email-jarod@redhat.com Link: https://bugzilla.kernel.org/show_bug.cgi?id=98581 Reported-by: Jarod Wilson <jarod@redhat.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Jarod Wilson <jarod@redhat.com> Tested-by: Jarod Wilson <jarod@redhat.com>
70 lines
1.7 KiB
Makefile
70 lines
1.7 KiB
Makefile
#
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# Makefile for the Linux kernel pci hotplug controller drivers.
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#
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obj-$(CONFIG_HOTPLUG_PCI) += pci_hotplug.o
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obj-$(CONFIG_HOTPLUG_PCI_COMPAQ) += cpqphp.o
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obj-$(CONFIG_HOTPLUG_PCI_IBM) += ibmphp.o
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# native drivers should be linked before acpiphp in order to allow the
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# native driver to attempt to bind first. We can then fall back to
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# generic support.
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obj-$(CONFIG_HOTPLUG_PCI_PCIE) += pciehp.o
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obj-$(CONFIG_HOTPLUG_PCI_CPCI_ZT5550) += cpcihp_zt5550.o
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obj-$(CONFIG_HOTPLUG_PCI_CPCI_GENERIC) += cpcihp_generic.o
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obj-$(CONFIG_HOTPLUG_PCI_SHPC) += shpchp.o
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obj-$(CONFIG_HOTPLUG_PCI_RPA) += rpaphp.o
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obj-$(CONFIG_HOTPLUG_PCI_RPA_DLPAR) += rpadlpar_io.o
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obj-$(CONFIG_HOTPLUG_PCI_SGI) += sgi_hotplug.o
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obj-$(CONFIG_HOTPLUG_PCI_ACPI) += acpiphp.o
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obj-$(CONFIG_HOTPLUG_PCI_S390) += s390_pci_hpc.o
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# acpiphp_ibm extends acpiphp, so should be linked afterwards.
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obj-$(CONFIG_HOTPLUG_PCI_ACPI_IBM) += acpiphp_ibm.o
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pci_hotplug-objs := pci_hotplug_core.o
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ifdef CONFIG_HOTPLUG_PCI_CPCI
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pci_hotplug-objs += cpci_hotplug_core.o \
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cpci_hotplug_pci.o
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endif
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ifdef CONFIG_ACPI
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pci_hotplug-objs += acpi_pcihp.o
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endif
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cpqphp-objs := cpqphp_core.o \
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cpqphp_ctrl.o \
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cpqphp_sysfs.o \
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cpqphp_pci.o
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cpqphp-$(CONFIG_HOTPLUG_PCI_COMPAQ_NVRAM) += cpqphp_nvram.o
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cpqphp-objs += $(cpqphp-y)
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ibmphp-objs := ibmphp_core.o \
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ibmphp_ebda.o \
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ibmphp_pci.o \
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ibmphp_res.o \
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ibmphp_hpc.o
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acpiphp-objs := acpiphp_core.o \
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acpiphp_glue.o
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rpaphp-objs := rpaphp_core.o \
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rpaphp_pci.o \
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rpaphp_slot.o
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rpadlpar_io-objs := rpadlpar_core.o \
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rpadlpar_sysfs.o
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pciehp-objs := pciehp_core.o \
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pciehp_ctrl.o \
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pciehp_pci.o \
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pciehp_hpc.o
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shpchp-objs := shpchp_core.o \
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shpchp_ctrl.o \
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shpchp_pci.o \
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shpchp_sysfs.o \
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shpchp_hpc.o
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