[PATCH 3/5] qtest/libqos/pci: Do not write to PBA memory

[Nicholas Piggin <npiggin@gmail.com>]

The PCI Local Bus Specification says the result of writes to MSI-X
PBA memory is undefined. QEMU implements them as no-ops, so remove
the pointless write from qpci_msix_pending().

Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
Cc: Dmitry Fleytman <dmitry.fleytman@gmail.com>
Cc: Akihiko Odaki <akihiko.odaki@daynix.com>
Cc: Sriram Yagnaraman <sriram.yagnaraman@ericsson.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
 tests/qtest/libqos/pci.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/tests/qtest/libqos/pci.c b/tests/qtest/libqos/pci.c
index 023c1617680..a187349d30a 100644
--- a/tests/qtest/libqos/pci.c
+++ b/tests/qtest/libqos/pci.c
@@ -361,8 +361,6 @@ bool qpci_msix_pending(QPCIDevice *dev, uint16_t entry)
 
     g_assert(dev->msix_enabled);
     pba_entry = qpci_io_readl(dev, dev->msix_pba_bar, dev->msix_pba_off + off);
-    qpci_io_writel(dev, dev->msix_pba_bar, dev->msix_pba_off + off,
-                   pba_entry & ~(1 << bit_n));
     return (pba_entry & (1 << bit_n)) != 0;
 }
 
-- 
2.45.2