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authorAmos Kong <kongjianjun@gmail.com>2012-05-23 10:20:35 -0600
committerBjorn Helgaas <bhelgaas@google.com>2012-06-13 16:38:10 -0600
commitce29ca3ea40744f24c2b5d88431e8ac566d257cc (patch)
treef5b56902875f1f9e4e9ea9baa0dfc35e22d54b05 /drivers/pci/search.c
parent638f293307b5787b69bf0a0bc915aed491efbec9 (diff)
downloadop-kernel-dev-ce29ca3ea40744f24c2b5d88431e8ac566d257cc.zip
op-kernel-dev-ce29ca3ea40744f24c2b5d88431e8ac566d257cc.tar.gz
PCI: acpiphp: remove all functions in slot, even without ACPI _EJx
When we add a device with acpiphp, we enumerate all functions in the slot with pci_scan_slot(), regardless of whether they have associated ACPI methods such as _EJ0. When removing the device, we previously removed only the functions with those ACPI methods. This patch makes the remove symmetric with the add: we remove all functions in the slot, whether they have associated ACPI methods or not. With qemu-kvm and SeaBIOS, we can build a multi-function device where only function 0 has _EJ0 and _ADR (see bugzilla below). Removing and re-adding that slot (including all functions of the device) works correctly with Windows guests. This patch makes it also work in Linux guests. [bhelgaas: restructure loop iteration, pull out of slot->funcs loop] Reference: https://bugzilla.kernel.org/show_bug.cgi?id=43219 Signed-off-by: Amos Kong <kongjianjun@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/search.c')
-rw-r--r--drivers/pci/search.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/pci/search.c b/drivers/pci/search.c
index 9d75dc8..993d4a0 100644
--- a/drivers/pci/search.c
+++ b/drivers/pci/search.c
@@ -15,6 +15,8 @@
#include "pci.h"
DECLARE_RWSEM(pci_bus_sem);
+EXPORT_SYMBOL_GPL(pci_bus_sem);
+
/*
* find the upstream PCIe-to-PCI bridge of a PCI device
* if the device is PCIE, return NULL
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