[Qemu-devel] [RFC][PATCH 24/45] qemu-kvm: msix: Don't handle mask updated while disabled

[Jan Kiszka]

As long as MSI-X is disabled, it's incorrect to invoke
msix_handle_mask_update on per-vector mask changes. That may misguide
the config notifier callback or spuriously trigger an MSI event.

Signed-off-by: Jan Kiszka <jan.kis...@siemens.com>
---
 hw/msix.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/hw/msix.c b/hw/msix.c
index 176bc76..7d45760 100644
--- a/hw/msix.c
+++ b/hw/msix.c
@@ -292,7 +292,7 @@ static void msix_mmio_write(void *opaque, 
target_phys_addr_t addr,
         kvm_msix_update(dev, vector, was_masked, msix_is_masked(dev, vector));
     }
 
-    if (vector < dev->msix_entries_nr) {
+    if (msix_enabled(dev) && vector < dev->msix_entries_nr) {
         is_masked = msix_is_masked(dev, vector);
         if (was_masked != is_masked) {
             msix_handle_mask_update(dev, vector);
-- 
1.7.3.4