serial: core: Prevent unsafe uart port access, part 3

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For tty operations which may expect uart port to have been removed
but still have other necessary work to accomplish, check for NULL
uart port; specifically uart_close(), uart_hangup() and sub-functions
(uart_shutdown() and uart_port_shutdown()).

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Peter Hurley 2016-04-09 18:56:35 -07:00 • committed by Greg Kroah-Hartman

parent 9ed19428a5

commit af224ca2df

1 changed files with 20 additions and 10 deletions

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drivers/tty/serial/serial_core.c

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