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Bluetooth: Fix RFCOMM parent device for reused dlc 

The RFCOMM tty device is parented to the acl link device when
the dlc state_change(BT_CONNECTED) notification is received.
However, if the dlc from the RFCOMM socket is being reused
(RFCOMM_REUSE_DLC is set), then the dlc may already be connected,
and no notification will occur.

Instead, always parent the RFCOMM tty device to the acl link
device at registration time. If the acl link device is not available
(eg, because the dlc is not connected) then the tty will remain
unparented until the BT_CONNECTED notification is received.

Fixes regression with ModemManager when the rfcomm device is
created with the flag RFCOMM_REUSE_DLC.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Tested-By: Alexander Holler <holler@ahsoftware.de>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Peter Hurley 2014-02-09 20:59:16 -05:00 committed by Marcel Holtmann
parent b92483d54a
commit b4d21f1939
1 changed files with 1 additions and 0 deletions
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1
net/bluetooth/rfcomm/tty.c
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@ -316,6 +316,7 @@ out:
goto free;
}
rfcomm_reparent_device(dev);
dev_set_drvdata(dev->tty_dev, dev);
if (device_create_file(dev->tty_dev, &dev_attr_address) < 0)