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virtio-gpu: avoid re-entering cmdq processing

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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;