From: Wei Liu <wei.l...@citrix.com>
pv-grub booting got broken with recent qemu-xen, due to
ac0487e1d2ae811cd4d035741a109a4ecfb013f1 ('xenfb.c: avoid expensive loops
when prod <= out_cons')
prod - out_cons can actually be XENFB_OUT_RING_LEN when the ring is exactly
full, this is a normal condition and should not be excluded.
From: Wei Liu <wei.l...@citrix.com>
Signed-off-by: Samuel Thibault <samuel.thiba...@ens-lyon.org>
Tested-by: Hao Xudong <xudong....@intel.com>
---
hw/display/xenfb.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/hw/display/xenfb.c b/hw/display/xenfb.c
index 40b096a..9866dfd 100644
--- a/hw/display/xenfb.c
+++ b/hw/display/xenfb.c
@@ -775,7 +775,7 @@ static void xenfb_handle_events(struct XenFB *xenfb)
prod = page->out_prod;
out_cons = page->out_cons;
- if (prod - out_cons >= XENFB_OUT_RING_LEN) {
+ if (prod - out_cons > XENFB_OUT_RING_LEN) {
return;
}
xen_rmb(); /* ensure we see ring contents up to prod */
--
2.8.0.rc3
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xen.org
http://lists.xen.org/xen-devel
