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

Move the M_WAITOK flag in notify() into an M_NOWAIT one in order to match

Browse Source 
the behaviour alredy present with the further malloc() call in
devctl_notify().
This fixes a bug in the CAM layer where the camisr handler finished to
call camperiphfree() (and subsequently destroy_dev() resulting in a new
dev notify) while the xpt lock is held.

PR:		kern/130330
Tested by:	Riccardo Torrini <riccardo dot torrini at esaote dot com>
This commit is contained in:
Attilio Rao 2009-05-21 13:22:07 +00:00
parent 46990862ab
commit 9995e57b01
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=192535
1 changed files with 3 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
sys/kern/kern_conf.c
View File

@ -491,7 +491,9 @@ notify(struct cdev *dev, const char *ev)
if (cold)
return;
namelen = strlen(dev->si_name);
data = malloc(namelen + sizeof(prefix), M_TEMP, M_WAITOK);
data = malloc(namelen + sizeof(prefix), M_TEMP, M_NOWAIT);
if (data == NULL)
return;
memcpy(data, prefix, sizeof(prefix) - 1);
memcpy(data + sizeof(prefix) - 1, dev->si_name, namelen + 1);
devctl_notify("DEVFS", "CDEV", ev, data);