serial: 8250: Do nothing if nr_uarts=0

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When nr_uarts was set to 0 (via config or 8250_core.nr_uarts), we crash
early on x86 because serial8250_isa_init_ports dereferences base_ops
which remains NULL. In fact, there is nothing to do for all the callers
of serial8250_isa_init_ports if there are no uarts.

Based on suggestions by Peter Hurley.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Jan Kiszka 2015-05-05 08:26:27 +02:00 • committed by Greg Kroah-Hartman

parent 24ee4df122

commit 59cfc45f17

1 changed files with 7 additions and 1 deletions

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drivers/tty/serial/8250/8250_core.c

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