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| author | dumbbell <dumbbell@FreeBSD.org> | 2015-03-01 12:54:22 +0000 |
|---|---|---|
| committer | dumbbell <dumbbell@FreeBSD.org> | 2015-03-01 12:54:22 +0000 |
| commit | df193d50d144894127e95f3263e9462596a344d2 (patch) | |
| tree | 4223e3d377fb373200c2dfa239b3c43e990ff76b /sys/dev/fb | |
| parent | a8e8986092752ebcae306387f3729a8425be26be (diff) | |
| download | FreeBSD-src-df193d50d144894127e95f3263e9462596a344d2.zip FreeBSD-src-df193d50d144894127e95f3263e9462596a344d2.tar.gz | |
vt(4): Add support to "downgrade" from eg. vt_fb to vt_vga
The main purpose of this feature is to be able to unload a KMS driver.
When going back from the current vt(4) backend to the previous backend,
the previous backend is reinitialized with the special VDF_DOWNGRADE
flag set. Then the current driver is terminated with the new "vd_fini"
callback.
In the case of vt_fb and vt_vga, this allows the former to pass the
vgapci device vt_fb used to vt_vga so the device can be rePOSTed.
Differential Revision: https://reviews.freebsd.org/D687
Diffstat (limited to 'sys/dev/fb')
| -rw-r--r-- | sys/dev/fb/fbd.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/sys/dev/fb/fbd.c b/sys/dev/fb/fbd.c index f9b4d8e..6b7b731 100644 --- a/sys/dev/fb/fbd.c +++ b/sys/dev/fb/fbd.c @@ -263,6 +263,8 @@ fbd_unregister(struct fb_info* info) LIST_FOREACH_SAFE(entry, &fb_list_head, fb_list, tmp) { if (entry->fb_info == info) { LIST_REMOVE(entry, fb_list); + if (LIST_EMPTY(&fb_list_head)) + vt_fb_detach(info); free(entry, M_DEVBUF); return (0); } |
