The branch stable/12 has been updated by kib: URL: https://cgit.FreeBSD.org/src/commit/?id=07509440d2e690de06d0973ae9334aecb3b4896b
commit 07509440d2e690de06d0973ae9334aecb3b4896b Author: Konstantin Belousov <[email protected]> AuthorDate: 2021-03-30 08:44:19 +0000 Commit: Konstantin Belousov <[email protected]> CommitDate: 2021-05-01 00:38:28 +0000 linuxkpi: do not destroy/free embedded linux cdevs (cherry picked from commit 7f9867f8c65b1b3e590dba4dc432a4bc8cf01f68) --- sys/compat/linuxkpi/common/src/linux_compat.c | 13 ++++++++++--- sys/compat/linuxkpi/common/src/linux_compat.c.orig | 6 +++--- 2 files changed, 13 insertions(+), 6 deletions(-) diff --git a/sys/compat/linuxkpi/common/src/linux_compat.c b/sys/compat/linuxkpi/common/src/linux_compat.c index 9c307650f1fd..6058af9c3395 100644 --- a/sys/compat/linuxkpi/common/src/linux_compat.c +++ b/sys/compat/linuxkpi/common/src/linux_compat.c @@ -2180,8 +2180,8 @@ linux_completion_done(struct completion *c) static void linux_cdev_deref(struct linux_cdev *ldev) { - - if (refcount_release(&ldev->refs)) + if (refcount_release(&ldev->refs) && + ldev->kobj.ktype == &linux_cdev_ktype) kfree(ldev); } @@ -2201,12 +2201,17 @@ linux_cdev_release(struct kobject *kobj) static void linux_cdev_static_release(struct kobject *kobj) { + struct cdev *cdev; struct linux_cdev *ldev; struct kobject *parent; ldev = container_of(kobj, struct linux_cdev, kobj); parent = kobj->parent; - linux_destroy_dev(ldev); + cdev = ldev->cdev; + if (cdev != NULL) { + destroy_dev(cdev); + ldev->cdev = NULL; + } kobject_put(parent); } @@ -2218,6 +2223,8 @@ linux_destroy_dev(struct linux_cdev *ldev) return; MPASS((ldev->siref & LDEV_SI_DTR) == 0); + MPASS(ldev->kobj.ktype == &linux_cdev_ktype); + atomic_set_int(&ldev->siref, LDEV_SI_DTR); while ((atomic_load_int(&ldev->siref) & ~LDEV_SI_DTR) != 0) pause("ldevdtr", hz / 4); diff --git a/sys/compat/linuxkpi/common/src/linux_compat.c.orig b/sys/compat/linuxkpi/common/src/linux_compat.c.orig index b7a7ba8b4f18..0731859e7a53 100644 --- a/sys/compat/linuxkpi/common/src/linux_compat.c.orig +++ b/sys/compat/linuxkpi/common/src/linux_compat.c.orig @@ -2220,12 +2220,12 @@ linux_cdev_release(struct kobject *kobj) static void linux_cdev_static_release(struct kobject *kobj) { - struct linux_cdev *cdev; + struct linux_cdev *ldev; struct kobject *parent; - cdev = container_of(kobj, struct linux_cdev, kobj); + ldev = container_of(kobj, struct linux_cdev, kobj); parent = kobj->parent; - linux_destroy_dev(cdev); + linux_destroy_dev(ldev); kobject_put(parent); } _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/dev-commits-src-all To unsubscribe, send any mail to "[email protected]"
