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| author | Jiang Liu <liuj97@gmail.com> | 2013-04-12 05:44:18 +0000 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2013-04-12 15:38:25 -0600 |
| commit | 3a0e40beefc20852191ed65d53e1b82d95ac11b8 (patch) | |
| tree | 88016bbede6794b6635d86e19c1cd09b56e295e4 /drivers/pci | |
| parent | d65eba6a7a769bb939303969267cbf1c916358f5 (diff) | |
| download | linux-3a0e40beefc20852191ed65d53e1b82d95ac11b8.tar.gz linux-3a0e40beefc20852191ed65d53e1b82d95ac11b8.tar.bz2 linux-3a0e40beefc20852191ed65d53e1b82d95ac11b8.zip | |
PCI: acpiphp: Remove all functions even if function 0 doesn't exist
Currently function disable_device() detects slot state by checking
existence of PCI function 0. It's unreliable because the PCI device
for function 0 may be removed through the sysfs interface. If that
happens, it will cause powering off a hotplug slot without destroying
all PCI devices.
On the other hand, it won't hurt us except wasting some computation
power if the check is removed, because all code of disable_device()
is self-protected. So remove the check.
Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Yinghai Lu <yinghai@kernel.org>
Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Cc: Toshi Kani <toshi.kani@hp.com>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/hotplug/acpiphp_glue.c | 7 |
1 files changed, 0 insertions, 7 deletions
diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c index 7948bc919605..a1c8dd67aae1 100644 --- a/drivers/pci/hotplug/acpiphp_glue.c +++ b/drivers/pci/hotplug/acpiphp_glue.c @@ -914,13 +914,6 @@ static int disable_device(struct acpiphp_slot *slot) struct pci_dev *pdev; struct pci_bus *bus = slot->bridge->pci_bus; - /* The slot will be enabled when func 0 is added, so check - func 0 before disable the slot. */ - pdev = pci_get_slot(bus, PCI_DEVFN(slot->device, 0)); - if (!pdev) - goto err_exit; - pci_dev_put(pdev); - list_for_each_entry(func, &slot->funcs, sibling) { if (func->bridge) { /* cleanup p2p bridges under this P2P bridge */ |