n_gsm: introduce enum gsm_mux_state

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gsm_mux->state is clearly an enumeration. So introduce one and use it
-- compiler now checks if valid values are assigned to the field.

Note that a compiler warns about unhandled cases in switch. Add default
cases with a pr_debug (which is not printed by default).

The values of the states are preserved thanks to the nature of enum.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20200219084949.28074-4-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Jiri Slaby 2020-02-19 09:49:43 +01:00 • committed by Greg Kroah-Hartman

parent e1785996f4

commit 329aa6e6e1

1 changed files with 21 additions and 12 deletions

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drivers/tty/n_gsm.c

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