Just like removal.
Because We could add new bus under the bridges...
Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>
---
drivers/pci/pci-sysfs.c | 28 +++++++++++++++++++---------
1 files changed, 19 insertions(+), 9 deletions(-)
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index 02d107b..60e04b2 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -356,24 +356,34 @@ remove_store(struct device *dev, struct device_attribute *dummy,
return count;
}
+static void bus_rescan_callback(struct device *dev)
+{
+ struct pci_bus *bus = to_pci_bus(dev);
+
+ mutex_lock(&pci_remove_rescan_mutex);
+ if (!pci_is_root_bus(bus) && list_empty(&bus->devices))
+ pci_rescan_bus_bridge_resize(bus->self);
+ else
+ pci_rescan_bus(bus);
+ mutex_unlock(&pci_remove_rescan_mutex);
+}
+
static ssize_t
dev_bus_rescan_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
+ int ret = 0;
unsigned long val;
- struct pci_bus *bus = to_pci_bus(dev);
if (strict_strtoul(buf, 0, &val) < 0)
return -EINVAL;
- if (val) {
- mutex_lock(&pci_remove_rescan_mutex);
- if (!pci_is_root_bus(bus) && list_empty(&bus->devices))
- pci_rescan_bus_bridge_resize(bus->self);
- else
- pci_rescan_bus(bus);
- mutex_unlock(&pci_remove_rescan_mutex);
- }
+ if (val)
+ ret = device_schedule_callback(dev, bus_rescan_callback);
+
+ if (ret)
+ count = ret;
+
return count;
}
--
1.7.7
--
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