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(parent: c368003) | patch
serial: 8250: Create serial_lsr_in()
authorIlpo Järvinen <ilpo.jarvinen@linux.intel.com>
Wed, 8 Jun 2022 09:54:27 +0000 (12:54 +0300)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 10 Jun 2022 11:45:08 +0000 (13:45 +0200)
commit005266f7841b0ebe988d19f66a7850132bac1f8c
treef5addd327dfbff3ba1db92eea49f67c50ea0fb2etree | snapshot
parentc368003b1c6847fc9273a9951e673b025c74e3e2commit | diff
serial: 8250: Create serial_lsr_in()

LSR register readers need to be careful in order to not lose bits that
are not preserved across reads. Create a helper that takes care of
storing the non-preserved bits into lsr_save_flags.

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20220608095431.18376-3-ilpo.jarvinen@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/tty/serial/8250/8250.h diff | blob | history
drivers/tty/serial/8250/8250_core.c diff | blob | history
drivers/tty/serial/8250/8250_port.c diff | blob | history
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