===================================================================
@@ -354,10 +354,15 @@ int dlpar_remove_pci_slot(char *drc_name
{
struct pci_bus *bus;
struct slot *slot;
+ int ret = 0;
+
+ pci_lock_rescan_remove();
bus = pcibios_find_pci_bus(dn);
- if (!bus)
- return -EINVAL;
+ if (!bus) {
+ ret = -EINVAL;
+ goto out;
+ }
pr_debug("PCI: Removing PCI slot below EADS bridge %s\n",
bus->self ? pci_name(bus->self) : "<!PHB!>");
@@ -371,7 +376,8 @@ int dlpar_remove_pci_slot(char *drc_name
printk(KERN_ERR
"%s: unable to remove hotplug slot %s\n",
__func__, drc_name);
- return -EIO;
+ ret = -EIO;
+ goto out;
}
}
@@ -382,7 +388,8 @@ int dlpar_remove_pci_slot(char *drc_name
if (pcibios_unmap_io_space(bus)) {
printk(KERN_ERR "%s: failed to unmap bus range\n",
__func__);
- return -ERANGE;
+ ret = -ERANGE;
+ goto out;
}
/* Remove the EADS bridge device itself */
@@ -390,7 +397,9 @@ int dlpar_remove_pci_slot(char *drc_name
pr_debug("PCI: Now removing bridge device %s\n", pci_name(bus->self));
pci_stop_and_remove_bus_device(bus->self);
- return 0;
+ out:
+ pci_unlock_rescan_remove();
+ return ret;
}
/**
===================================================================
@@ -254,9 +254,12 @@ int __ref cpci_configure_slot(struct slo
{
struct pci_dev *dev;
struct pci_bus *parent;
+ int ret = 0;
dbg("%s - enter", __func__);
+ pci_lock_rescan_remove();
+
if (slot->dev == NULL) {
dbg("pci_dev null, finding %02x:%02x:%x",
slot->bus->number, PCI_SLOT(slot->devfn), PCI_FUNC(slot->devfn));
@@ -277,7 +280,8 @@ int __ref cpci_configure_slot(struct slo
slot->dev = pci_get_slot(slot->bus, slot->devfn);
if (slot->dev == NULL) {
err("Could not find PCI device for slot %02x", slot->number);
- return -ENODEV;
+ ret = -ENODEV;
+ goto out;
}
}
parent = slot->dev->bus;
@@ -294,8 +298,10 @@ int __ref cpci_configure_slot(struct slo
pci_bus_add_devices(parent);
+ out:
+ pci_unlock_rescan_remove();
dbg("%s - exit", __func__);
- return 0;
+ return ret;
}
int cpci_unconfigure_slot(struct slot* slot)
@@ -308,6 +314,8 @@ int cpci_unconfigure_slot(struct slot* s
return -ENODEV;
}
+ pci_lock_rescan_remove();
+
list_for_each_entry_safe(dev, temp, &slot->bus->devices, bus_list) {
if (PCI_SLOT(dev->devfn) != PCI_SLOT(slot->devfn))
continue;
@@ -318,6 +326,8 @@ int cpci_unconfigure_slot(struct slot* s
pci_dev_put(slot->dev);
slot->dev = NULL;
+ pci_unlock_rescan_remove();
+
dbg("%s - exit", __func__);
return 0;
}
===================================================================
@@ -39,22 +39,26 @@ int pciehp_configure_device(struct slot
struct pci_dev *dev;
struct pci_dev *bridge = p_slot->ctrl->pcie->port;
struct pci_bus *parent = bridge->subordinate;
- int num;
+ int num, ret = 0;
struct controller *ctrl = p_slot->ctrl;
+ pci_lock_rescan_remove();
+
dev = pci_get_slot(parent, PCI_DEVFN(0, 0));
if (dev) {
ctrl_err(ctrl, "Device %s already exists "
"at %04x:%02x:00, cannot hot-add\n", pci_name(dev),
pci_domain_nr(parent), parent->number);
pci_dev_put(dev);
- return -EINVAL;
+ ret = -EINVAL;
+ goto out;
}
num = pci_scan_slot(parent, PCI_DEVFN(0, 0));
if (num == 0) {
ctrl_err(ctrl, "No new device found\n");
- return -ENODEV;
+ ret = -ENODEV;
+ goto out;
}
list_for_each_entry(dev, &parent->devices, bus_list)
@@ -73,7 +77,9 @@ int pciehp_configure_device(struct slot
pci_bus_add_devices(parent);
- return 0;
+ out:
+ pci_unlock_rescan_remove();
+ return ret;
}
int pciehp_unconfigure_device(struct slot *p_slot)
@@ -92,6 +98,8 @@ int pciehp_unconfigure_device(struct slo
if (ret)
presence = 0;
+ pci_lock_rescan_remove();
+
/*
* Stopping an SR-IOV PF device removes all the associated VFs,
* which will update the bus->devices list and confuse the
@@ -126,5 +134,6 @@ int pciehp_unconfigure_device(struct slo
pci_dev_put(dev);
}
+ pci_unlock_rescan_remove();
return rc;
}
===================================================================
@@ -86,6 +86,8 @@ int cpqhp_configure_device (struct contr
struct pci_bus *child;
int num;
+ pci_lock_rescan_remove();
+
if (func->pci_dev == NULL)
func->pci_dev = pci_get_bus_and_slot(func->bus,PCI_DEVFN(func->device, func->function));
@@ -100,7 +102,7 @@ int cpqhp_configure_device (struct contr
func->pci_dev = pci_get_bus_and_slot(func->bus, PCI_DEVFN(func->device, func->function));
if (func->pci_dev == NULL) {
dbg("ERROR: pci_dev still null\n");
- return 0;
+ goto out;
}
}
@@ -113,6 +115,8 @@ int cpqhp_configure_device (struct contr
pci_dev_put(func->pci_dev);
+ out:
+ pci_unlock_rescan_remove();
return 0;
}
@@ -123,6 +127,7 @@ int cpqhp_unconfigure_device(struct pci_
dbg("%s: bus/dev/func = %x/%x/%x\n", __func__, func->bus, func->device, func->function);
+ pci_lock_rescan_remove();
for (j=0; j<8 ; j++) {
struct pci_dev* temp = pci_get_bus_and_slot(func->bus, PCI_DEVFN(func->device, j));
if (temp) {
@@ -130,6 +135,7 @@ int cpqhp_unconfigure_device(struct pci_
pci_stop_and_remove_bus_device(temp);
}
}
+ pci_unlock_rescan_remove();
return 0;
}
===================================================================
@@ -718,6 +718,8 @@ static void ibm_unconfigure_device(struc
func->device, func->function);
debug("func->device << 3 | 0x0 = %x\n", func->device << 3 | 0x0);
+ pci_lock_rescan_remove();
+
for (j = 0; j < 0x08; j++) {
temp = pci_get_bus_and_slot(func->busno, (func->device << 3) | j);
if (temp) {
@@ -725,7 +727,10 @@ static void ibm_unconfigure_device(struc
pci_dev_put(temp);
}
}
+
pci_dev_put(func->dev);
+
+ pci_unlock_rescan_remove();
}
/*
@@ -780,6 +785,8 @@ static int ibm_configure_device(struct p
int flag = 0; /* this is to make sure we don't double scan the bus,
for bridged devices primarily */
+ pci_lock_rescan_remove();
+
if (!(bus_structure_fixup(func->busno)))
flag = 1;
if (func->dev == NULL)
@@ -789,7 +796,7 @@ static int ibm_configure_device(struct p
if (func->dev == NULL) {
struct pci_bus *bus = pci_find_bus(0, func->busno);
if (!bus)
- return 0;
+ goto out;
num = pci_scan_slot(bus,
PCI_DEVFN(func->device, func->function));
@@ -800,7 +807,7 @@ static int ibm_configure_device(struct p
PCI_DEVFN(func->device, func->function));
if (func->dev == NULL) {
err("ERROR... : pci_dev still NULL\n");
- return 0;
+ goto out;
}
}
if (!(flag) && (func->dev->hdr_type == PCI_HEADER_TYPE_BRIDGE)) {
@@ -810,6 +817,8 @@ static int ibm_configure_device(struct p
pci_bus_add_devices(child);
}
+ out:
+ pci_unlock_rescan_remove();
return 0;
}
===================================================================
@@ -80,7 +80,9 @@ static int enable_slot(struct hotplug_sl
goto out_deconfigure;
pci_scan_slot(slot->zdev->bus, ZPCI_DEVFN);
+ pci_lock_rescan_remove();
pci_bus_add_devices(slot->zdev->bus);
+ pci_unlock_rescan_remove();
return rc;
@@ -98,7 +100,7 @@ static int disable_slot(struct hotplug_s
return -EIO;
if (slot->zdev->pdev)
- pci_stop_and_remove_bus_device(slot->zdev->pdev);
+ pci_stop_and_remove_bus_device_locked(slot->zdev->pdev);
rc = zpci_disable_device(slot->zdev);
if (rc)
===================================================================
@@ -40,7 +40,9 @@ int __ref shpchp_configure_device(struct
struct controller *ctrl = p_slot->ctrl;
struct pci_dev *bridge = ctrl->pci_dev;
struct pci_bus *parent = bridge->subordinate;
- int num;
+ int num, ret = 0;
+
+ pci_lock_rescan_remove();
dev = pci_get_slot(parent, PCI_DEVFN(p_slot->device, 0));
if (dev) {
@@ -48,13 +50,15 @@ int __ref shpchp_configure_device(struct
"at %04x:%02x:%02x, cannot hot-add\n", pci_name(dev),
pci_domain_nr(parent), p_slot->bus, p_slot->device);
pci_dev_put(dev);
- return -EINVAL;
+ ret = -EINVAL;
+ goto out;
}
num = pci_scan_slot(parent, PCI_DEVFN(p_slot->device, 0));
if (num == 0) {
ctrl_err(ctrl, "No new device found\n");
- return -ENODEV;
+ ret = -ENODEV;
+ goto out;
}
list_for_each_entry(dev, &parent->devices, bus_list) {
@@ -75,7 +79,9 @@ int __ref shpchp_configure_device(struct
pci_bus_add_devices(parent);
- return 0;
+ out:
+ pci_unlock_rescan_remove();
+ return ret;
}
int shpchp_unconfigure_device(struct slot *p_slot)
@@ -89,6 +95,8 @@ int shpchp_unconfigure_device(struct slo
ctrl_dbg(ctrl, "%s: domain:bus:dev = %04x:%02x:%02x\n",
__func__, pci_domain_nr(parent), p_slot->bus, p_slot->device);
+ pci_lock_rescan_remove();
+
list_for_each_entry_safe(dev, temp, &parent->devices, bus_list) {
if (PCI_SLOT(dev->devfn) != p_slot->device)
continue;
@@ -108,6 +116,8 @@ int shpchp_unconfigure_device(struct slo
pci_stop_and_remove_bus_device(dev);
pci_dev_put(dev);
}
+
+ pci_unlock_rescan_remove();
return rc;
}
===================================================================
@@ -459,12 +459,15 @@ static int enable_slot(struct hotplug_sl
acpi_scan_lock_release();
}
+ pci_lock_rescan_remove();
+
/* Call the driver for the new device */
pci_bus_add_devices(slot->pci_bus);
/* Call the drivers for the new devices subordinate to PPB */
if (new_ppb)
pci_bus_add_devices(new_bus);
+ pci_unlock_rescan_remove();
mutex_unlock(&sn_hotplug_mutex);
if (rc == 0)
@@ -540,6 +543,7 @@ static int disable_slot(struct hotplug_s
acpi_scan_lock_release();
}
+ pci_lock_rescan_remove();
/* Free the SN resources assigned to the Linux device.*/
list_for_each_entry_safe(dev, temp, &slot->pci_bus->devices, bus_list) {
if (PCI_SLOT(dev->devfn) != slot->device_num + 1)
@@ -550,6 +554,7 @@ static int disable_slot(struct hotplug_s
pci_stop_and_remove_bus_device(dev);
pci_dev_put(dev);
}
+ pci_unlock_rescan_remove();
/* Remove the SSDT for the slot from the ACPI namespace */
if (SN_ACPI_BASE_SUPPORT() && ssdt_id) {
===================================================================
@@ -398,7 +398,9 @@ static int enable_slot(struct hotplug_sl
return retval;
if (state == PRESENT) {
+ pci_lock_rescan_remove();
pcibios_add_pci_devices(slot->bus);
+ pci_unlock_rescan_remove();
slot->state = CONFIGURED;
} else if (state == EMPTY) {
slot->state = EMPTY;
@@ -418,7 +420,9 @@ static int disable_slot(struct hotplug_s
if (slot->state == NOT_CONFIGURED)
return -EINVAL;
+ pci_lock_rescan_remove();
pcibios_remove_pci_devices(slot->bus);
+ pci_unlock_rescan_remove();
vm_unmap_aliases();
slot->state = NOT_CONFIGURED;