bluetooth: hci_ldisc: fix deadlock condition

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commit da64c27d3c upstream.

LDISCs shouldn't call tty->ops->write() from within
->write_wakeup().

->write_wakeup() is called with port lock taken and
IRQs disabled, tty->ops->write() will try to acquire
the same port lock and we will deadlock.

Acked-by: Marcel Holtmann <marcel@holtmann.org>
Reviewed-by: Peter Hurley <peter@hurleysoftware.com>
Reported-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Tested-by: Andreas Bießmann <andreas@biessmann.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Felipe Balbi 2014-04-23 09:58:26 -05:00 • committed by Greg Kroah-Hartman

parent d9d4f29b1e

commit b29d1fa928

2 changed files with 20 additions and 5 deletions

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24

drivers/bluetooth/hci_ldisc.c

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1

drivers/bluetooth/hci_uart.h

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