Author: araujo
Date: Wed Jan 16 03:46:27 2019
New Revision: 343077
URL: https://svnweb.freebsd.org/changeset/base/343077
Log:
Fix broken uart on Win2016 guest.
Obtained from: Joyent (commit/2bf1a940afbd1382faff159e7c93c72779ca10f4)
MFC after: 3 weeks.
Modified:
head/usr.sbin/bhyve/uart_emul.c
Modified: head/usr.sbin/bhyve/uart_emul.c
==============================================================================
--- head/usr.sbin/bhyve/uart_emul.c Wed Jan 16 03:07:32 2019
(r343076)
+++ head/usr.sbin/bhyve/uart_emul.c Wed Jan 16 03:46:27 2019
(r343077)
@@ -431,6 +431,13 @@ uart_write(struct uart_softc *sc, int offset, uint8_t
sc->thre_int_pending = true;
break;
case REG_IER:
+ /* Assert an interrupt if re-enabling the THRE intr, since we
+ * always report THRE as active in the status register.
+ */
+ if ((sc->ier & IER_ETXRDY) == 0 &&
+ (value & IER_ETXRDY) != 0) {
+ sc->thre_int_pending = true;
+ }
/*
* Apply mask so that bits 4-7 are 0
* Also enables bits 0-3 only if they're 1
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