PCI devices for SR-IOV virtual functions should only be created/ destroyed by pci_enable_sriov()/pci_disable_sriov() because special data structures are assoicated with SR-IOV virtual functions. So hide hotplug related sysfs interfaces "remove" and "rescan" for SR-IOV virtual functions, otherwise it may causes memory leakage and other issues. Signed-off-by: Jiang Liu <jiang.liu@xxxxxxxxxx> Signed-off-by: Yijing Wang <wangyijing@xxxxxxxxxx> Cc: Donald Dutile <ddutile@xxxxxxxxxx> Cc: Yinghai Lu <yinghai@xxxxxxxxxx> Cc: Ram Pai <linuxram@xxxxxxxxxx> Cc: linux-pci@xxxxxxxxxxxxxxx Cc: linux-kernel@xxxxxxxxxxxxxxx --- drivers/pci/iov.c | 5 ++--- drivers/pci/pci-sysfs.c | 30 ++++++++++++++++++++++++++++-- 2 files changed, 30 insertions(+), 5 deletions(-) diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c index 3e33499..5eb8165 100644 --- a/drivers/pci/iov.c +++ b/drivers/pci/iov.c @@ -80,6 +80,8 @@ static int virtfn_add(struct pci_dev *dev, int id, int reset) pci_read_config_word(dev, iov->pos + PCI_SRIOV_VF_DID, &virtfn->device); pci_setup_device(virtfn); virtfn->dev.parent = dev->dev.parent; + virtfn->physfn = pci_dev_get(dev); + virtfn->is_virtfn = 1; for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) { res = dev->resource + PCI_IOV_RESOURCES + i; @@ -101,9 +103,6 @@ static int virtfn_add(struct pci_dev *dev, int id, int reset) pci_device_add(virtfn, virtfn->bus); mutex_unlock(&iov->dev->sriov->lock); - virtfn->physfn = pci_dev_get(dev); - virtfn->is_virtfn = 1; - rc = pci_bus_add_device(virtfn); sprintf(buf, "virtfn%u", id); rc = sysfs_create_link(&dev->dev.kobj, &virtfn->dev.kobj, buf); diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index 5b4a9d9..403da60 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 -- 1.8.1.2 -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html