Author: dumbbell
Date: Tue Oct 14 19:10:00 2014
New Revision: 273104
URL: https://svnweb.freebsd.org/changeset/base/273104
Log:
vt(4): Don't recalculate buffer size if we don't know screen size
MF10: r273037
MFC: r272537
When the screen size is unknown, it's set to 0x0. We can't use that as
the buffer size, otherwise, functions such as vtbuf_fill() will fail.
This fixes a panic on RaspberryPi, where there's no vt(4) backend
configured early in boot.
PR: 193981
Tested by: danilo@
Approved by: re (marius)
Modified:
releng/10.1/sys/dev/vt/vt_core.c
Directory Properties:
releng/10.1/ (props changed)
Modified: releng/10.1/sys/dev/vt/vt_core.c
==============================================================================
--- releng/10.1/sys/dev/vt/vt_core.c Tue Oct 14 19:01:11 2014
(r273103)
+++ releng/10.1/sys/dev/vt/vt_core.c Tue Oct 14 19:10:00 2014
(r273104)
@@ -1269,7 +1269,8 @@ vtterm_cnprobe(struct terminal *tm, stru
* that we have the real viewable size, fix it in the static
* buffer.
*/
- vt_termsize(vd, vw->vw_font, &vw->vw_buf.vb_scr_size);
+ if (vd->vd_width != 0 && vd->vd_height != 0)
+ vt_termsize(vd, vw->vw_font, &vw->vw_buf.vb_scr_size);
vtbuf_init_early(&vw->vw_buf);
vt_winsize(vd, vw->vw_font, &wsz);
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