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firewire: Grab dev->sem when doing the update callback.

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This serializes the update callback with the probe and remove callback from
the driver core and prevents remove from being called while update is
running for the same device.

Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
Kristian Høgsberg 2007-03-19 11:37:16 -04:00 committed by Stefan Richter
parent 11f494ee25
commit 015b066f4e
1 changed files with 4 additions and 1 deletions
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5
drivers/firewire/fw-device.c
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@ -562,8 +562,11 @@ static int update_unit(struct device *dev, void *data)
struct fw_unit *unit = fw_unit(dev);
struct fw_driver *driver = (struct fw_driver *)dev->driver;
if (is_fw_unit(dev) && driver != NULL && driver->update != NULL)
if (is_fw_unit(dev) && driver != NULL && driver->update != NULL) {
down(&dev->sem);
driver->update(unit);
up(&dev->sem);
}
return 0;
}