d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Add intermediate states for attaching and detaching that will be

Browse Source 
reused by the enhached newbus locking once it is checked in.
This change can be easilly MFCed to STABLE_8 at the appropriate moment.

Reviewed by:	jhb, scottl
Tested by:	Giovanni Trematerra <giovanni dot trematerra at gmail dot com>
This commit is contained in:
Attilio Rao 2009-09-03 13:40:41 +00:00
parent 19dbe46d28
commit 80002a63db
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=196779
2 changed files with 22 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
sys/kern/subr_bus.c
View File

@ -2625,10 +2625,16 @@ device_attach(device_t dev)
{
int error;
if (dev->state >= DS_ATTACHING)
return (0);
device_sysctl_init(dev);
if (!device_is_quiet(dev))
device_print_child(dev->parent, dev);
dev->state = DS_ATTACHING;
if ((error = DEVICE_ATTACH(dev)) != 0) {
KASSERT(dev->state == DS_ATTACHING,
("%s: %p device state must not been changing", __func__,
dev));
printf("device_attach: %s%d attach returned %d\n",
dev->driver->name, dev->unit, error);
/* Unset the class; set in device_probe_child */
@ -2639,6 +2645,8 @@ device_attach(device_t dev)
dev->state = DS_NOTPRESENT;
return (error);
}
KASSERT(dev->state == DS_ATTACHING,
("%s: %p device state must not been changing", __func__, dev));
device_sysctl_update(dev);
dev->state = DS_ATTACHED;
devadded(dev);
@ -2674,8 +2682,16 @@ device_detach(device_t dev)
if (dev->state != DS_ATTACHED)
return (0);
if ((error = DEVICE_DETACH(dev)) != 0)
dev->state = DS_DETACHING;
if ((error = DEVICE_DETACH(dev)) != 0) {
KASSERT(dev->state == DS_DETACHING,
("%s: %p device state must not been changing", __func__,
dev));
dev->state = DS_ATTACHED;
return (error);
}
KASSERT(dev->state == DS_DETACHING,
("%s: %p device state must not been changing", __func__, dev));
devremoved(dev);
if (!device_is_quiet(dev))
device_printf(dev, "detached\n");
@ -2730,7 +2746,7 @@ device_quiesce(device_t dev)
int
device_shutdown(device_t dev)
{
if (dev->state < DS_ATTACHED)
if (dev->state < DS_ATTACHED || dev->state == DS_DETACHING)
return (0);
return (DEVICE_SHUTDOWN(dev));
}

5
sys/sys/bus.h
View File

@ -52,8 +52,11 @@ struct u_businfo {
typedef enum device_state {
DS_NOTPRESENT, /**< @brief not probed or probe failed */
DS_ALIVE, /**< @brief probe succeeded */
DS_ATTACHING, /**< @brief attaching is in progress */
DS_ATTACHED, /**< @brief attach method called */
DS_BUSY /**< @brief device is open */
DS_BUSY, /**< @brief device is open */
DS_DETACHING /**< @brief detaching is in progress */
} device_state_t;
/**