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serial: sh-sci: Fix HSCIF RX sampling point adjustment

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commit 6b87784b53 upstream.

The calculation of the sampling point has min() and max() exchanged.
Fix this by using the clamp() helper instead.

Fixes: 63ba1e00f1 ("serial: sh-sci: Support for HSCIF RX sampling point adjustment")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Ulrich Hecht <uli+renesas@fpond.eu>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Dirk Behme <dirk.behme@de.bosch.com>
Cc: stable <stable@vger.kernel.org>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Geert Uytterhoeven
2019-03-29 10:10:26 +01:00
committed by Greg Kroah-Hartman
parent ec96f65e12
commit de6d6b8902
1 changed files with 1 additions and 1 deletions
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2
drivers/tty/serial/sh-sci.c
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@@ -2504,7 +2504,7 @@ done:
* last stop bit; we can increase the error
* margin by shifting the sampling point.
*/
int shift = min(-8, max(7, deviation / 2));
int shift = clamp(deviation / 2, -8, 7);
hssrr |= (shift << HSCIF_SRHP_SHIFT) &
HSCIF_SRHP_MASK;