git: 362677cae8e9 - stable/13 - loader: comconsole: don't unconditionally wipe out hw.uart.console

The branch stable/13 has been updated by kevans:

URL: https://cgit.FreeBSD.org/src/commit/?id=362677cae8e9ac4c6f7ff4d74a4378ea11d47797

commit 362677cae8e9ac4c6f7ff4d74a4378ea11d47797
Author:     Kyle Evans <kevans@FreeBSD.org>
AuthorDate: 2023-04-14 04:41:22 +0000
Commit:     Kyle Evans <kevans@FreeBSD.org>
CommitDate: 2023-04-26 17:30:19 +0000

    loader: comconsole: don't unconditionally wipe out hw.uart.console
    
    It may be the case that we need to set hw.uart.console manually in some
    scenarios that comconsole can't necessarily support.  Avoid clobbering
    hw.uart.console unless we've actually selected comconsole so that one
    could at least get kernel console output..
    
    Discussed with: imp
    Sponsored by:   Zenith Electronics LLC
    Sponsored by:   Klara, Inc.
    
    (cherry picked from commit ec671f4980437008b0119c6367816083e15fa503)
---
 stand/i386/libi386/comconsole.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/stand/i386/libi386/comconsole.c b/stand/i386/libi386/comconsole.c
index ed1f1aa08ed7..6d48e876fa37 100644
--- a/stand/i386/libi386/comconsole.c
+++ b/stand/i386/libi386/comconsole.c
@@ -324,12 +324,13 @@ comc_setup(int speed, int port)
 	char intbuf[64];
 	int tries;
 
-	unsetenv("hw.uart.console");
 	comc_curspeed = speed;
 	comc_port = port;
 	if ((comconsole.c_flags & (C_ACTIVEIN | C_ACTIVEOUT)) == 0)
 		return;
 
+	unsetenv("hw.uart.console");
+
 #define	COMC_TEST	0xbb
 	/*
 	 * Write byte to scratch register and read it out.