From: Marek Roszko <mark.roszko@gmail.com>
Date: Tue, 7 Jan 2014 10:45:07 +0000 (+0100)
Subject: tty/serial: at91: fix race condition in atmel_serial_remove
X-Git-Tag: v3.14-rc1~149^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f50c995f9ebf064cea1368bf361c4e29679415b4;p=pandora-kernel.git

tty/serial: at91: fix race condition in atmel_serial_remove

The _remove callback could be called when a tasklet is scheduled. tasklet_kill
was called inside the function in order to free up any scheduled tasklets.
However it was called after uart_remove_one_port which destroys tty references
needed in the port for atmel_tasklet_func.
Simply putting the tasklet_kill at the start of the function will prevent this
conflict.

Signed-off-by: Marek Roszko <mark.roszko@gmail.com>
Acked-by: Leilei Zhao <leilei.zhao@atmel.com>
Cc: <stable@vger.kernel.org> # v3.12
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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