serial: core: Fix serial core port id to not use port->line

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The serial core port id should be serial core controller specific port
instance, which is not always the port->line index.

For example, 8250 driver maps a number of legacy ports, and when a
hardware specific device driver takes over, we typically have one
driver instance for each port. Let's instead add port->port_id to
keep track serial ports mapped to each serial core controller instance.

Currently this is only a cosmetic issue for the serial core port device
names. The issue can be noticed looking at /sys/bus/serial-base/devices
for example though. Let's fix the issue to avoid port addressing issues
later on.

Fixes: 84a9582fd2 ("serial: core: Start managing serial controllers to enable runtime PM")
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Link: https://lore.kernel.org/r/20230725054216.45696-3-tony@atomide.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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This commit is contained in:

Tony Lindgren 2023-07-25 08:42:11 +03:00 • committed by Greg Kroah-Hartman

parent 83c35180ab

commit d962de6ae5

3 changed files with 4 additions and 1 deletions

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2

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

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2

drivers/tty/serial/serial_base_bus.c

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1

include/linux/serial_core.h

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