From: Patrick Gefre Set the timeout and threshold to better values. Signed-off-by: Patrick Gefre Signed-off-by: Andrew Morton --- drivers/serial/ioc4_serial.c | 11 +++++++---- 1 files changed, 7 insertions(+), 4 deletions(-) diff -puN drivers/serial/ioc4_serial.c~altix-ioc4-serial-set-a-better-timeout-threshold drivers/serial/ioc4_serial.c --- 25/drivers/serial/ioc4_serial.c~altix-ioc4-serial-set-a-better-timeout-threshold 2005-04-26 20:16:49.739217296 -0700 +++ 25-akpm/drivers/serial/ioc4_serial.c 2005-04-26 20:16:49.745216384 -0700 @@ -1272,8 +1272,9 @@ static inline int set_rx_timeout(struct * and set the rx threshold to that amount. There are 4 chars * per ring entry, so we'll divide the number of chars that will * arrive in timeout by 4. + * So .... timeout * baud / 10 / HZ / 4, with HZ = 100. */ - threshold = timeout * port->ip_baud / 10 / HZ / 4; + threshold = timeout * port->ip_baud / 4000; if (threshold == 0) threshold = 1; /* otherwise we'll intr all the time! */ @@ -1285,8 +1286,10 @@ static inline int set_rx_timeout(struct writel(port->ip_sscr, &port->ip_serial_regs->sscr); - /* Now set the rx timeout to the given value */ - timeout = timeout * IOC4_SRTR_HZ / HZ; + /* Now set the rx timeout to the given value + * again timeout * IOC4_SRTR_HZ / HZ + */ + timeout = timeout * IOC4_SRTR_HZ / 100; if (timeout > IOC4_SRTR_CNT) timeout = IOC4_SRTR_CNT; @@ -1380,7 +1383,7 @@ config_port(struct ioc4_port *port, if (port->ip_tx_lowat == 0) port->ip_tx_lowat = 1; - set_rx_timeout(port, port->ip_rx_timeout); + set_rx_timeout(port, 2); return 0; } _