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Call the module's unload handler before removing the device from the

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cdevsw list.  This allows a handler to veto the load without losing its
place in the list.

PR:	kern/10653
This commit is contained in:
Doug Rabson 1999-03-23 21:11:47 +00:00
parent ce04fea445
commit 6ca34d85be
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=44975
1 changed files with 26 additions and 19 deletions
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45
sys/kern/kern_conf.c
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@ -30,7 +30,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: kern_conf.c,v 1.29 1998/11/14 21:58:51 wollman Exp $
* $Id: kern_conf.c,v 1.30 1999/01/27 21:49:55 dillon Exp $
*/
#include <sys/param.h>
@ -173,14 +173,18 @@ cdevsw_module_handler(module_t mod, int what, void *arg)
switch (what) {
case MOD_LOAD:
if ((error = cdevsw_add(&data->dev, data->cdevsw, NULL)) != 0)
return error;
break;
error = cdevsw_add(&data->dev, data->cdevsw, NULL);
if (!error && data->chainevh)
error = data->chainevh(mod, what, data->chainarg);
return error;
case MOD_UNLOAD:
if ((error = cdevsw_add(&data->dev, NULL, NULL)) != 0)
return error;
break;
if (data->chainevh) {
error = data->chainevh(mod, what, data->chainarg);
if (error)
return error;
}
return cdevsw_add(&data->dev, NULL, NULL);
}
if (data->chainevh)
@ -197,20 +201,23 @@ bdevsw_module_handler(module_t mod, int what, void* arg)
switch (what) {
case MOD_LOAD:
if ((error = cdevsw_add(&data->cdev, data->cdevsw, NULL)) != 0)
return error;
if ((error = bdevsw_add(&data->bdev, data->cdevsw, NULL)) != 0) {
cdevsw_add(&data->bdev, NULL, NULL);
return error;
}
break;
error = cdevsw_add(&data->cdev, data->cdevsw, NULL);
if (!error)
error = bdevsw_add(&data->bdev, data->cdevsw, NULL);
if (!error && data->chainevh)
error = data->chainevh(mod, what, data->chainarg);
return error;
case MOD_UNLOAD:
if ((error = bdevsw_add(&data->bdev, NULL, NULL)) != 0)
return error;
if ((error = cdevsw_add(&data->cdev, NULL, NULL)) != 0)
return error;
break;
if (data->chainevh) {
error = data->chainevh(mod, what, data->chainarg);
if (error)
return error;
}
error = bdevsw_add(&data->bdev, NULL, NULL);
if (!error)
error = cdevsw_add(&data->cdev, NULL, NULL);
return error;
}
if (data->chainevh)