[Qemu-devel] [PATCH 12/60] intel_hda: do not call msi_reset when only device state needs resetting

[Michael Tokarev]

Commit 8e729e3b521d9 "intel-hda: Fix reset of MSI function"
(applied to 1.1.1 as 0ec39075710) added a call to msi_reset()
into intel_hda_reset() function.  But this function is called
not only from PCI bus reset method, but also from device init
method (intel_hda_set_g_ctl()), and there, we should not reset
msi state.  For this, split intel_hda_reset() into two halves,
one common part with device reset, and one with msi reset,
intel_hda_reset_msi(), which also calls the common part, for
the bus method.

This is only needed for 1.1.x series, since in 1.2+, MSI reset
is called in proper places by the PCI code already.

Signed-off-by: Michael Tokarev <address@hidden>
Cc: Jan Kiszka <address@hidden>
Cc: Michael S. Tsirkin <address@hidden>
Cc: address@hidden
---
 hw/intel-hda.c |   14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/hw/intel-hda.c b/hw/intel-hda.c
index e38861e..da61323 100644
--- a/hw/intel-hda.c
+++ b/hw/intel-hda.c
@@ -1107,9 +1107,6 @@ static void intel_hda_reset(DeviceState *dev)
     DeviceState *qdev;
     HDACodecDevice *cdev;
 
-    if (d->msi) {
-        msi_reset(&d->pci);
-    }
     intel_hda_regs_reset(d);
     d->wall_base_ns = qemu_get_clock_ns(vm_clock);
 
@@ -1122,6 +1119,15 @@ static void intel_hda_reset(DeviceState *dev)
     intel_hda_update_irq(d);
 }
 
+static void intel_hda_reset_msi(DeviceState *dev)
+{
+    IntelHDAState *d = DO_UPCAST(IntelHDAState, pci.qdev, dev);
+    if (d->msi) {
+        msi_reset(&d->pci);
+    }
+    intel_hda_reset(dev);
+}
+
 static int intel_hda_init(PCIDevice *pci)
 {
     IntelHDAState *d = DO_UPCAST(IntelHDAState, pci, pci);
@@ -1261,7 +1267,7 @@ static void intel_hda_class_init(ObjectClass *klass, void 
*data)
     k->revision = 1;
     k->class_id = PCI_CLASS_MULTIMEDIA_HD_AUDIO;
     dc->desc = "Intel HD Audio Controller";
-    dc->reset = intel_hda_reset;
+    dc->reset = intel_hda_reset_msi;
     dc->vmsd = &vmstate_intel_hda;
     dc->props = intel_hda_properties;
 }
-- 
1.7.10.4