git: c53ec86f0ee9 - stable/14 - iichid(4): Do not power down opened device in attach handler

The branch stable/14 has been updated by wulf:

URL: https://cgit.FreeBSD.org/src/commit/?id=c53ec86f0ee97f07f80c0902b189c845bf448e7d

commit c53ec86f0ee97f07f80c0902b189c845bf448e7d
Author:     Vladimir Kondratyev <wulf@FreeBSD.org>
AuthorDate: 2024-11-08 19:23:38 +0000
Commit:     Vladimir Kondratyev <wulf@FreeBSD.org>
CommitDate: 2024-11-12 04:08:33 +0000

    iichid(4): Do not power down opened device in attach handler
    
    Some iichid(4) child devices, currently hkbd(4) only, opens parent
    device in their attach handlers. That breaks internal iichid(4) state
    leading to rejecting any incoming data on software and hardware levels.
    
    Fix it with adding of extra state check in iichid(4) attach handler.
    
    Reported by:    many
    Submitted by:   trasz (initial version)
    PR:             280290
    MFC after:      3 days
    
    (cherry picked from commit 018cb11cb7d412b031e1be681a6a19e734473f99)
---
 sys/dev/iicbus/iichid.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/sys/dev/iicbus/iichid.c b/sys/dev/iicbus/iichid.c
index 1e0dac2ee5dd..e99facdb06bb 100644
--- a/sys/dev/iicbus/iichid.c
+++ b/sys/dev/iicbus/iichid.c
@@ -1205,8 +1205,12 @@ iichid_attach(device_t dev)
 		iichid_detach(dev);
 	}
 done:
-	(void)iichid_set_power(sc, I2C_HID_POWER_OFF);
-	sc->power_on = false;
+	iicbus_request_bus(device_get_parent(dev), dev, IIC_WAIT);
+	if (!sc->open) {
+		(void)iichid_set_power(sc, I2C_HID_POWER_OFF);
+		sc->power_on = false;
+	}
+	iicbus_release_bus(device_get_parent(dev), dev);
 	return (error);
 }