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virtio-gpu: avoid re-entering cmdq processing 

The next patch will notify the GL context got flush, which will resume
the queue processing. However, if this happens within the caller
context, it will end up with a stack overflow flush/update loop.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210204105232.834642-18-marcandre.lureau@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Marc-André Lureau 2021-02-04 14:52:29 +04:00 committed by Gerd Hoffmann
parent 2606519b74
commit f8f3c2719e
2 changed files with 6 additions and 0 deletions
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5
hw/display/virtio-gpu.c
View File

@ -814,6 +814,10 @@ void virtio_gpu_process_cmdq(VirtIOGPU *g)
{
struct virtio_gpu_ctrl_command *cmd;
if (g->processing_cmdq) {
return;
}
g->processing_cmdq = true;
while (!QTAILQ_EMPTY(&g->cmdq)) {
cmd = QTAILQ_FIRST(&g->cmdq);
@ -843,6 +847,7 @@ void virtio_gpu_process_cmdq(VirtIOGPU *g)
g_free(cmd);
}
}
g->processing_cmdq = false;
}
static void virtio_gpu_gl_unblock(VirtIOGPUBase *b)

1
include/hw/virtio/virtio-gpu.h
View File

@ -148,6 +148,7 @@ struct VirtIOGPU {
uint64_t hostmem;
bool processing_cmdq;
bool renderer_inited;
bool renderer_reset;
QEMUTimer *fence_poll;