Author: avg
Date: Fri Oct 25 14:20:59 2019
New Revision: 354069
URL: https://svnweb.freebsd.org/changeset/base/354069
Log:
owc_gpiobus_read_data: disable preemption earlier
Now this is done before starting the low pulse that has rather tight
timing.
Reviewed by: imp (D22108)
MFC after: 2 weeks
Modified:
head/sys/dev/ow/owc_gpiobus.c
Modified: head/sys/dev/ow/owc_gpiobus.c
==============================================================================
--- head/sys/dev/ow/owc_gpiobus.c Fri Oct 25 13:47:17 2019
(r354068)
+++ head/sys/dev/ow/owc_gpiobus.c Fri Oct 25 14:20:59 2019
(r354069)
@@ -279,6 +279,8 @@ owc_gpiobus_read_data(device_t dev, struct ow_timing *
if (error != 0)
return (error);
+ critical_enter();
+
/* Force low for t_lowr microseconds */
then = sbinuptime();
OUTPIN(sc);
@@ -291,7 +293,6 @@ owc_gpiobus_read_data(device_t dev, struct ow_timing *
* master's pushing the line low.
*/
INPIN(sc);
- critical_enter();
do {
now = sbinuptime();
GETPIN(sc, &sample);
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