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serial: sh-sci: Change checking for error rate of HSCIF

Message ID 1416437907-15160-1-git-send-email-nobuhiro.iwamatsu.yj@renesas.com (mailing list archive)
State Awaiting Upstream
Delegated to: Geert Uytterhoeven
Headers show

Commit Message

Nobuhiro Iwamatsu Nov. 19, 2014, 10:58 p.m. UTC 
This changes negative values of error rate to be checked, because these
values are valid as error rate. And this changes in the process of adopting
a value close to 0.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
---
 drivers/tty/serial/sh-sci.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)
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Patch

diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index 3081e46..ae7ac07 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -1812,9 +1812,6 @@  static void sci_baud_calc_hscif(unsigned int bps, unsigned long freq,
 			err = DIV_ROUND_CLOSEST(freq, ((br + 1) * bps * sr *
 					       (1 << (2 * c + 1)) / 1000)) -
 					       1000;
-			if (err < 0)
-				continue;
-
 			/* Calc recv margin
 			 * M: Receive margin (%)
 			 * N: Ratio of bit rate to clock (N = sampling rate)
@@ -1829,7 +1826,7 @@  static void sci_baud_calc_hscif(unsigned int bps, unsigned long freq,
 			 */
 			recv_margin = abs((500 -
 					DIV_ROUND_CLOSEST(1000, sr << 1)) / 10);
-			if (min_err > err) {
+			if (abs(min_err) > abs(err)) {
 				min_err = err;
 				recv_max_margin = recv_margin;
 			} else if ((min_err == err) &&