[PATCH RFC v2 02/11] tty: xuartps: Print warning in clock notifier
From: Soren Brinkmann <hidden>
Date: 2014-03-07 19:14:25
Also in:
linux-serial, lkml
Subsystem:
the rest, tty layer and serial drivers · Maintainers:
Linus Torvalds, Greg Kroah-Hartman, Jiri Slaby
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 <redacted> --- 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