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| author | Jiang Liu <liuj97@gmail.com> | 2013-05-31 12:21:31 +0800 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2013-06-05 12:18:50 -0600 |
| commit | dfab88beda88d6c24111e5966b08ecf813c3a18a (patch) | |
| tree | f3450d385cc3362201b3ac5a6c3d7cd8d8945886 /drivers/pci | |
| parent | fbf33f516bdbcc2ab1ba1e54dfb720b0cfaa6874 (diff) | |
| download | linux-dfab88beda88d6c24111e5966b08ecf813c3a18a.tar.gz linux-dfab88beda88d6c24111e5966b08ecf813c3a18a.tar.xz | |
PCI: Hide remove and rescan sysfs interfaces for SR-IOV virtual functions
PCI devices for SR-IOV virtual functions should only be created/
destroyed by pci_enable_sriov()/pci_disable_sriov() because special
data structures are associated with SR-IOV virtual functions.
So hide hotplug related sysfs interfaces "remove" and "rescan" for
SR-IOV virtual functions, otherwise it may cause memory leakage
and other issues.
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>
Cc: Donald Dutile <ddutile@redhat.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Ram Pai <linuxram@us.ibm.com>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/pci-sysfs.c | 30 |
1 files changed, 28 insertions, 2 deletions
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index 5b4a9d9cd200..403da60cd983 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -325,6 +325,8 @@ dev_rescan_store(struct device *dev, struct device_attribute *attr, } return count; } +struct device_attribute dev_rescan_attr = __ATTR(rescan, (S_IWUSR|S_IWGRP), + NULL, dev_rescan_store); static void remove_callback(struct device *dev) { @@ -354,6 +356,8 @@ remove_store(struct device *dev, struct device_attribute *dummy, count = ret; return count; } +struct device_attribute dev_remove_attr = __ATTR(remove, (S_IWUSR|S_IWGRP), + NULL, remove_store); static ssize_t dev_bus_rescan_store(struct device *dev, struct device_attribute *attr, @@ -504,8 +508,6 @@ struct device_attribute pci_dev_attrs[] = { __ATTR(broken_parity_status,(S_IRUGO|S_IWUSR), broken_parity_status_show,broken_parity_status_store), __ATTR(msi_bus, 0644, msi_bus_show, msi_bus_store), - __ATTR(remove, (S_IWUSR|S_IWGRP), NULL, remove_store), - __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_rescan_store), #if defined(CONFIG_PM_RUNTIME) && defined(CONFIG_ACPI) __ATTR(d3cold_allowed, 0644, d3cold_allowed_show, d3cold_allowed_store), #endif @@ -1463,6 +1465,29 @@ static umode_t pci_dev_attrs_are_visible(struct kobject *kobj, return a->mode; } +static struct attribute *pci_dev_hp_attrs[] = { + &dev_remove_attr.attr, + &dev_rescan_attr.attr, + NULL, +}; + +static umode_t pci_dev_hp_attrs_are_visible(struct kobject *kobj, + struct attribute *a, int n) +{ + struct device *dev = container_of(kobj, struct device, kobj); + struct pci_dev *pdev = to_pci_dev(dev); + + if (pdev->is_virtfn) + return 0; + + return a->mode; +} + +static struct attribute_group pci_dev_hp_attr_group = { + .attrs = pci_dev_hp_attrs, + .is_visible = pci_dev_hp_attrs_are_visible, +}; + #ifdef CONFIG_PCI_IOV static struct attribute *sriov_dev_attrs[] = { &sriov_totalvfs_attr.attr, @@ -1494,6 +1519,7 @@ static struct attribute_group pci_dev_attr_group = { static const struct attribute_group *pci_dev_attr_groups[] = { &pci_dev_attr_group, + &pci_dev_hp_attr_group, #ifdef CONFIG_PCI_IOV &sriov_dev_attr_group, #endif |