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| /linux/drivers/tty/serial/ |
| H A D | serial_core.c | diff 4f794097797f551917b68797e39f25fcb17d5b3a Wed Mar 21 03:52:38 CET 2018 Jeremy Kerr <jk@ozlabs.org> serial: expose buf_overrun count through proc interface
The buf_overrun count is only every written, and not exposed to
userspace anywhere. This means that dropped characters due to flip
buffer overruns are never visible to userspace.
The /proc/tty/driver/serial file exports a bunch of metrics (including
hardware overruns) already, so add the buf_overrun (as "bo:") to this
file.
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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