[PATCH v2 2/7] tty: xuartps: Print warning in clock notifier

Soren Brinkmann
2014-03-10T21:40:05Z

Print a warning if the clock notifier rejects a clock frequency change
to facilitate debugging (see:
http://thread.gmane.org/gmane.linux.ports.arm.kernel/304329/focus=304379)

Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
---
drivers/tty/serial/xilinx_uartps.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c
index 1c6e1a68ae95..b00060052316 100644
--- a/drivers/tty/serial/xilinx_uartps.c
+++ b/drivers/tty/serial/xilinx_uartps.c
@@ -429,8 +429,10 @@ static int xuartps_clk_notifier_cb(struct notifier_block *nb,
* frequency.
*/
if (!xuartps_calc_baud_divs(ndata->new_rate, xuartps->baud,
- &bdiv, &cd, &div8))
+ &bdiv, &cd, &div8)) {
+ dev_warn(port->dev, "clock rate change rejected\n");
return NOTIFY_BAD;
+ }

spin_lock_irqsave(&xuartps->port->lock, flags);

--
1.9.0.1.g4196000