It will rediscover removed pci root buses.
Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>
---
drivers/pci/pci-sysfs.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index 4d122cb..fc0a7de 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -284,6 +284,7 @@ msi_bus_store(struct device *dev, struct device_attribute *attr,
#ifdef CONFIG_HOTPLUG
static DEFINE_MUTEX(pci_remove_rescan_mutex);
+void __weak arch_pci_root_rescan(void) { }
static ssize_t bus_rescan_store(struct bus_type *bus, const char *buf,
size_t count)
{
@@ -295,6 +296,7 @@ static ssize_t bus_rescan_store(struct bus_type *bus, const char *buf,
if (val) {
mutex_lock(&pci_remove_rescan_mutex);
+ arch_pci_root_rescan();
while ((b = pci_find_next_bus(b)) != NULL)
pci_rescan_bus(b);
mutex_unlock(&pci_remove_rescan_mutex);
--
1.7.7
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