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Subject[PATCH 06/23] PCI: rescan with bus or bridge using callback method too
Date
Just like removal.

Because We could add new bus under the bridges...

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
drivers/pci/pci-sysfs.c | 43 +++++++++++++++++++++++++++++++------------
1 files changed, 31 insertions(+), 12 deletions(-)
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index 2049b2f..1794508 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -325,21 +325,31 @@ dev_rescan_store(struct device *dev, struct device_attribute *attr,
return count;
}

+static void bridge_rescan_callback(struct device *dev)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+
+ mutex_lock(&pci_remove_rescan_mutex);
+ pci_rescan_bus_bridge_resize(pdev);
+ mutex_unlock(&pci_remove_rescan_mutex);
+}
+
static ssize_t
dev_bridge_rescan_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
+ int ret = 0;
unsigned long val;
- struct pci_dev *pdev = to_pci_dev(dev);

if (kstrtoul(buf, 0, &val) < 0)
return -EINVAL;

- if (val) {
- mutex_lock(&pci_remove_rescan_mutex);
- pci_rescan_bus_bridge_resize(pdev);
- mutex_unlock(&pci_remove_rescan_mutex);
- }
+ if (val)
+ ret = device_schedule_callback(dev, bridge_rescan_callback);
+
+ if (ret)
+ count = ret;
+
return count;
}

@@ -375,21 +385,30 @@ 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);
+ 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);
- 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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