qxl: don't assert() if device isn't yet initialized
commit95bef686e490bc3afc3f51f5fc6e20bf260b938c
authorMarc-André Lureau <marcandre.lureau@redhat.com>
Mon, 14 Aug 2023 19:33:30 +0000 (14 23:33 +0400)
committerMichael Tokarev <mjt@tls.msk.ru>
Fri, 8 Sep 2023 10:08:52 +0000 (8 13:08 +0300)
treeef43de91c1a3e4e0c25cd27a16ef14680c455908
parent90a0778421acdf4ca903be64c8ed19378183c944
qxl: don't assert() if device isn't yet initialized

If the PCI BAR isn't yet mapped or was unmapped, QXL_IO_SET_MODE will
assert(). Instead, report a guest bug and keep going.

This can be reproduced with:

cat << EOF | ./qemu-system-x86_64 -vga qxl -m 2048 -nodefaults -qtest stdio
outl 0xcf8 0x8000101c
outl 0xcfc 0xc000
outl 0xcf8 0x80001001
outl 0xcfc 0x01000000
outl 0xc006 0x00
EOF

Fixes: https://gitlab.com/qemu-project/qemu/-/issues/1829

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Cc: qemu-stable@nongnu.org
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
hw/display/qxl.c