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| author | Marc-André Lureau <marcandre.lureau@gmail.com> | 2014-10-10 19:05:11 +0200 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2014-10-15 11:08:34 +0200 |
| commit | 9e5a25f1c209ff51e4b65124a3b76dd3f1b0fb49 (patch) | |
| tree | 7ac09b2dd38a60ca955e481dfd8e54b02e495f5f /hw/display/qxl.c | |
| parent | b1d28ec6a7dbdaadda39d29322f0de694aeb0b74 (diff) | |
| download | qemu-9e5a25f1c209ff51e4b65124a3b76dd3f1b0fb49.tar.gz qemu-9e5a25f1c209ff51e4b65124a3b76dd3f1b0fb49.tar.bz2 qemu-9e5a25f1c209ff51e4b65124a3b76dd3f1b0fb49.zip | |
qxl: keep going if reaching guest bug on empty area
Xorg server hangs when using xfig and typing a text with space:
#0 qxl_wait_for_io_command (qxl=<value optimized out>) at qxl_io.c:47
#1 0x00007f826a49a299 in qxl_download_box (surface=0x221d030, x1=231, y1=259,
x2=<value optimized out>, y2=<value optimized out>) at qxl_surface.c:143
while (!(ram_header->int_pending & QXL_INTERRUPT_IO_CMD))
usleep (1);
The QXL driver is calling QXL_IO_UPDATE_AREA with an empty area. This
is a guest bug. The call is async and no ack is sent back on guest
bug, so the X server will hang. The driver should be improved to avoid
this situation and also to abort on QXL_INTERRUPT_ERROR. This will be
a different patch series for the driver. However, it is simple enough
to keep qemu running on empty areas update, which is what this patch
provides.
https://bugzilla.redhat.com/show_bug.cgi?id=1151363
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'hw/display/qxl.c')
| -rw-r--r-- | hw/display/qxl.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/hw/display/qxl.c b/hw/display/qxl.c index 93b3518b21..b540dd656c 100644 --- a/hw/display/qxl.c +++ b/hw/display/qxl.c @@ -1591,6 +1591,11 @@ async_common: qxl_set_guest_bug(d, "QXL_IO_UPDATE_AREA: invalid area (%ux%u)x(%ux%u)\n", update.left, update.top, update.right, update.bottom); + if (update.left == update.right || update.top == update.bottom) { + /* old drivers may provide empty area, keep going */ + qxl_clear_guest_bug(d); + goto cancel_async; + } break; } if (async == QXL_ASYNC) { |