[PATCH 11/14] pci: use device_remove_file_self() instead of device_schedule_callback()

Tejun Heo
2014-01-10T13:47:36Z

driver-core now supports synchrnous self-deletion of attributes and
the asynchrnous removal mechanism is scheduled for removal. Use it
instead of device_schedule_callback(). This makes "remove" behave
synchronously.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: linux-pci@vger.kernel.org
---
drivers/pci/pci-sysfs.c | 24 ++++++------------------
1 file changed, 6 insertions(+), 18 deletions(-)

diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index c91e6c1..94d1cb8 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -352,32 +352,20 @@ static struct device_attribute dev_rescan_attr = __ATTR(rescan,
(S_IWUSR|S_IWGRP),
NULL, dev_rescan_store);

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

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

- /* An attribute cannot be unregistered by one of its own methods,
- * so we have to use this roundabout approach.
- */
- if (val)
- ret = device_schedule_callback(dev, remove_callback);
- if (ret)
- count = ret;
+ if (val && device_remove_file_self(dev, attr)) {
+ mutex_lock(&pci_remove_rescan_mutex);
+ pci_stop_and_remove_bus_device(to_pci_dev(dev));
+ mutex_unlock(&pci_remove_rescan_mutex);
+ }
return count;
}
static struct device_attribute dev_remove_attr = __ATTR(remove,
--
1.8.4.2