[xen staging] x86/hvm: check against VIOAPIC_LEVEL_TRIG in hvm_gsi_deassert

[patchbot@xxxxxxx]

commit 81ebf6e707ec0f49e257b136ce0421cbba4f4819
Author:     Roger Pau Monné <roger.pau@xxxxxxxxxx>
AuthorDate: Fri Jun 19 15:23:50 2020 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Fri Jun 19 15:23:50 2020 +0200

    x86/hvm: check against VIOAPIC_LEVEL_TRIG in hvm_gsi_deassert
    
    In order to avoid relying on the specific values of
    VIOAPIC_{LEVEL/EDGE}_TRIG.
    
    No functional change.
    
    Requested-by: Jan Beulich <jbeulich@xxxxxxxx>
    Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
    Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
    Release-acked-by: Paul Durrant <paul@xxxxxxx>
---
 xen/arch/x86/hvm/irq.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/arch/x86/hvm/irq.c b/xen/arch/x86/hvm/irq.c
index fd02cf2e8d..38ac5fb6c7 100644
--- a/xen/arch/x86/hvm/irq.c
+++ b/xen/arch/x86/hvm/irq.c
@@ -201,7 +201,7 @@ void hvm_gsi_deassert(struct domain *d, unsigned int gsi)
     int trig = vioapic_get_trigger_mode(d, gsi);
     struct hvm_irq *hvm_irq = hvm_domain_irq(d);
 
-    if ( trig <= VIOAPIC_EDGE_TRIG || gsi >= hvm_irq->nr_gsis )
+    if ( trig != VIOAPIC_LEVEL_TRIG || gsi >= hvm_irq->nr_gsis )
     {
         ASSERT(trig == VIOAPIC_EDGE_TRIG && gsi < hvm_irq->nr_gsis);
         return;
--
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