tty: always relink the port
commit273f632912
upstream. If the serial device is disconnected and reconnected, it re-enumerates properly but does not link it. fwiw, linking means just saving the port index, so allow it always as there is no harm in saving the same value again even if it tries to relink with the same port. Fixes:fb2b90014d
("tty: link tty and port before configuring it as console") Reported-by: Kenneth R. Crudup <kenny@panix.com> Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com> Cc: stable <stable@vger.kernel.org> Link: https://lore.kernel.org/r/20191227174434.12057-1-sudipm.mukherjee@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -89,8 +89,7 @@ void tty_port_link_device(struct tty_port *port,
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{
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{
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if (WARN_ON(index >= driver->num))
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if (WARN_ON(index >= driver->num))
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return;
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return;
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if (!driver->ports[index])
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driver->ports[index] = port;
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driver->ports[index] = port;
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}
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}
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EXPORT_SYMBOL_GPL(tty_port_link_device);
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EXPORT_SYMBOL_GPL(tty_port_link_device);
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