Message ID | 1364461382-20359-1-git-send-email-lig.fnst@cn.fujitsu.com |
---|---|
State | New |
Headers | show |
diff --git a/hw/i386/pc.c b/hw/i386/pc.c index 09fb728..b881314 100644 --- a/hw/i386/pc.c +++ b/hw/i386/pc.c @@ -444,7 +444,9 @@ static void port92_write(void *opaque, hwaddr addr, uint64_t val, DPRINTF("port92: write 0x%02x\n", val); s->outport = val; - qemu_set_irq(*s->a20_out, (val >> 1) & 1); + if (s->a20_out) { + qemu_set_irq(*s->a20_out, (val >> 1) & 1); + } if (val & 1) { qemu_system_reset_request(); }
e.g. $qemu-system-x86_64 -device port92 will report segment fault, for port92_write try a un-allocated assignment for a20_out. so check before this assignment. Signed-off-by: liguang <lig.fnst@cn.fujitsu.com> --- hw/i386/pc.c | 4 +++- 1 files changed, 3 insertions(+), 1 deletions(-)