memory: Fix old_portio vs non-zero offset

The legacy functions that we're wrapping expect that offset
to be included in the register.  Indeed, they generally
expect the absolute address and then mask off the "high" bits.

The FDC is the first converted device with a non-zero offset.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Avi Kivity <avi@redhat.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/memory.c b/memory.c
index 531b57533a..8e9ac460e8 100644
--- a/memory.c
+++ b/memory.c
@@ -396,7 +396,7 @@ static void memory_region_iorange_read(IORange *iorange,
 
         *data = ((uint64_t)1 << (width * 8)) - 1;
         if (mrp) {
-            *data = mrp->read(mr->opaque, offset - mrp->offset);
+            *data = mrp->read(mr->opaque, offset);
         }
         return;
     }
@@ -418,7 +418,7 @@ static void memory_region_iorange_write(IORange *iorange,
         const MemoryRegionPortio *mrp = find_portio(mr, offset, width, true);
 
         if (mrp) {
-            mrp->write(mr->opaque, offset - mrp->offset, data);
+            mrp->write(mr->opaque, offset, data);
         }
         return;
     }