vgsp-sema: persist the GR data-arg hold window across pump passes

The pump works on a snapshot copy of the channel table; without the
end-of-pass write-back the hold window was re-armed every pass and a
launch whose argument pointers never translate was never consumed (r122:
smiley's launch held forever). Persist gr_hold_until/gr_hold_idx so the
hold is exactly one bounded window per entry, then the entry is consumed
as before.

1 files changed, 8 insertions, 0 deletions

diff --git a/kernel/gsp_sema_service.c b/kernel/gsp_sema_service.c
index 4bed8ab..9ab609a 100644
--- a/kernel/gsp_sema_service.c
+++ b/kernel/gsp_sema_service.c
@@ -14869,6 +14869,14 @@ static void svc_pump_channels(struct nv_vgpu_device *vgpu)
 				svc.chan[k].unread_idx = ch->unread_idx;
 				svc.chan[k].unread_until = ch->unread_until;
 				svc.chan[k].unread_ipin_pa = ch->unread_ipin_pa;
+				/*
+				 * m150: the GR data-arg hold window is snapshot
+				 * state too; without the write-back every pass
+				 * would re-arm it and a permanently unresolved
+				 * launch would never be consumed.
+				 */
+				svc.chan[k].gr_hold_until = ch->gr_hold_until;
+				svc.chan[k].gr_hold_idx = ch->gr_hold_idx;
 				svc.chan[k].pushpg_va = ch->pushpg_va;
 				svc.chan[k].pushpg_n = ch->pushpg_n;
 				svc.chan[k].content_max = ch->content_max;