Author: mw
Date: Tue Apr 2 08:35:24 2019
New Revision: 345792
URL: https://svnweb.freebsd.org/changeset/base/345792
Log:
MFC r344676: Prevent detaching driver if the attach is not finished
Submitted by: Rafal Kozik <r...@semihalf.com>
Obtained from: Semihalf
Sponsored by: Amazon, Inc.
Modified:
stable/12/sys/kern/subr_bus.c
Modified: stable/12/sys/kern/subr_bus.c
==============================================================================
--- stable/12/sys/kern/subr_bus.c Tue Apr 2 04:12:06 2019
(r345791)
+++ stable/12/sys/kern/subr_bus.c Tue Apr 2 08:35:24 2019
(r345792)
@@ -2994,6 +2994,10 @@ device_detach(device_t dev)
PDEBUG(("%s", DEVICENAME(dev)));
if (dev->state == DS_BUSY)
return (EBUSY);
+ if (dev->state == DS_ATTACHING) {
+ device_printf(dev, "device in attaching state! Deferring
detach.\n");
+ return (EBUSY);
+ }
if (dev->state != DS_ATTACHED)
return (0);
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