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[Xen-devel] [PATCH 08/11] cirrus_vga: reset lfb_addr after a pci config

To: "qemu-devel@xxxxxxxxxx Developers" <qemu-devel@xxxxxxxxxx>
Subject: [Xen-devel] [PATCH 08/11] cirrus_vga: reset lfb_addr after a pci config write if the BAR is unmapped
From: Alexander Graf <agraf@xxxxxxx>
Date: Sun, 19 Jun 2011 05:39:47 +0200
Cc: "xen-devel@xxxxxxxxxxxxxxxxxxx Devel" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Anthony Liguori <anthony@xxxxxxxxxxxxx>, Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
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From: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>

If the cirrus_vga PCI BAR is unmapped than we should not only reset
map_addr but also lfb_addr, otherwise we'll keep trying to map
the old lfb_addr in map_linear_vram.

Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
Acked-by: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
Signed-off-by: Alexander Graf <agraf@xxxxxxx>
 hw/cirrus_vga.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/hw/cirrus_vga.c b/hw/cirrus_vga.c
index 722cac7..3c5043e 100644
--- a/hw/cirrus_vga.c
+++ b/hw/cirrus_vga.c
@@ -3088,8 +3088,11 @@ static void pci_cirrus_write_config(PCIDevice *d,
     CirrusVGAState *s = &pvs->cirrus_vga;
     pci_default_write_config(d, address, val, len);
-    if (s->vga.map_addr && d->io_regions[0].addr == PCI_BAR_UNMAPPED)
+    if (s->vga.map_addr && d->io_regions[0].addr == PCI_BAR_UNMAPPED) {
         s->vga.map_addr = 0;
+        s->vga.lfb_addr = 0;
+        s->vga.lfb_end = 0;
+    }

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