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Marcel Holtmann a67e899cf3 Bluetooth: Fix issue with sysfs handling for connections ... Due to a semantic changes in flush_workqueue() the current approach of synchronizing the sysfs handling for connections doesn't work anymore. The whole approach is actually fully broken and based on assumptions that are no longer valid. With the introduction of Simple Pairing support, the creation of low-level ACL links got changed. This change invalidates the reason why in the past two independent work queues have been used for adding/removing sysfs devices. The adding of the actual sysfs device is now postponed until the host controller successfully assigns an unique handle to that link. So the real synchronization happens inside the controller and not the host. The only left-over problem is that some internals of the sysfs device handling are not initialized ahead of time. This leaves potential access to invalid data and can cause various NULL pointer dereferences. To fix this a new function makes sure that all sysfs details are initialized when an connection attempt is made. The actual sysfs device is only registered when the connection has been successfully established. To avoid a race condition with the registration, the check if a device is registered has been moved into the removal work. As an extra protection two flush_work() calls are left in place to make sure a previous add/del work has been completed first. Based on a report by Marc Pignat <marc.pignat@hevs.ch> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Tested-by: Justin P. Mattock <justinmattock@gmail.com> Tested-by: Roger Quadros <ext-roger.quadros@nokia.com> Tested-by: Marc Pignat <marc.pignat@hevs.ch>		16 years ago
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bnep	…
cmtp	Bluetooth: Remove some pointless conditionals before kfree_skb()	16 years ago
hidp	…
rfcomm	Bluetooth: Fix removing of RFCOMM DLC timer with DEFER_SETUP	16 years ago
Kconfig	…
Makefile	…
af_bluetooth.c	…
hci_conn.c	Bluetooth: Fix issue with sysfs handling for connections	16 years ago
hci_core.c	Bluetooth: Remove some pointless conditionals before kfree_skb()	16 years ago
hci_event.c	Bluetooth: Add different pairing timeout for Legacy Pairing	16 years ago
hci_sock.c	…
hci_sysfs.c	Bluetooth: Fix issue with sysfs handling for connections	16 years ago
l2cap.c	Bluetooth: Remove some pointless conditionals before kfree_skb()	16 years ago
lib.c	…
sco.c	…