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Revert "serial_core: Update buffer overrun statistics."

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This reverts commit 642180871b.

Buffer overruns are for hardware reported overruns, not software ones,
which will only happen if we run out of memory and you will get lots of
-ENOMEM errors at the same time.

Thanks to Alan Cox for catching this.

Reported-by: Alan Cox <[email protected]>
Cc: Corbin Atkinson <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Greg Kroah-Hartman 2012-05-15 09:44:22 -07:00
commit 55e4b8b416
1 changed files with 2 additions and 4 deletions
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6
drivers/tty/serial/serial_core.c
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@ -2527,16 +2527,14 @@ void uart_insert_char(struct uart_port *port, unsigned int status,
struct tty_struct *tty = port->state->port.tty;
if ((status & port->ignore_status_mask & ~overrun) == 0)
if (tty_insert_flip_char(tty, ch, flag) == 0)
++port->icount.buf_overrun;
tty_insert_flip_char(tty, ch, flag);
/*
* Overrun is special. Since it's reported immediately,
* it doesn't affect the current character.
*/
if (status & ~port->ignore_status_mask & overrun)
if (tty_insert_flip_char(tty, 0, TTY_OVERRUN) == 0)
++port->icount.buf_overrun;
tty_insert_flip_char(tty, 0, TTY_OVERRUN);
}
EXPORT_SYMBOL_GPL(uart_insert_char);