diff options
Diffstat (limited to 'sys/fs/devfs')
| -rw-r--r-- | sys/fs/devfs/devfs_int.h | 1 | ||||
| -rw-r--r-- | sys/fs/devfs/devfs_vnops.c | 17 |
2 files changed, 15 insertions, 3 deletions
diff --git a/sys/fs/devfs/devfs_int.h b/sys/fs/devfs/devfs_int.h index 916297425b53..9fa75c0e90ad 100644 --- a/sys/fs/devfs/devfs_int.h +++ b/sys/fs/devfs/devfs_int.h @@ -67,6 +67,7 @@ struct cdev_priv { void *cdp_dtr_cb_arg; LIST_HEAD(, cdev_privdata) cdp_fdpriv; + u_int cdp_fdpriv_dtrc; struct mtx cdp_threadlock; }; diff --git a/sys/fs/devfs/devfs_vnops.c b/sys/fs/devfs/devfs_vnops.c index caadf257b8ad..323f1e0fa961 100644 --- a/sys/fs/devfs/devfs_vnops.c +++ b/sys/fs/devfs/devfs_vnops.c @@ -200,14 +200,25 @@ devfs_foreach_cdevpriv(struct cdev *dev, int (*cb)(void *data, void *arg), void devfs_destroy_cdevpriv(struct cdev_privdata *p) { + struct file *fp; + struct cdev_priv *cdp; mtx_assert(&cdevpriv_mtx, MA_OWNED); - KASSERT(p->cdpd_fp->f_cdevpriv == p, - ("devfs_destoy_cdevpriv %p != %p", p->cdpd_fp->f_cdevpriv, p)); - p->cdpd_fp->f_cdevpriv = NULL; + fp = p->cdpd_fp; + KASSERT(fp->f_cdevpriv == p, + ("devfs_destoy_cdevpriv %p != %p", fp->f_cdevpriv, p)); + cdp = cdev2priv((struct cdev *)fp->f_data); + cdp->cdp_fdpriv_dtrc++; + fp->f_cdevpriv = NULL; LIST_REMOVE(p, cdpd_list); mtx_unlock(&cdevpriv_mtx); (p->cdpd_dtr)(p->cdpd_data); + mtx_lock(&cdevpriv_mtx); + MPASS(cdp->cdp_fdpriv_dtrc >= 1); + cdp->cdp_fdpriv_dtrc--; + if (cdp->cdp_fdpriv_dtrc == 0) + wakeup(&cdp->cdp_fdpriv_dtrc); + mtx_unlock(&cdevpriv_mtx); free(p, M_CDEVPDATA); } |