drivers/modesetting: Save current BlockHandler on return in msBlockHandler
If the BlockHandler chain is modified while it is active, we need to re-fetch the current value and store it in our private for use the next time through. Signed-off-by: Dave Airlie <airlied@redhat.com> Signed-off-by: Keith Packard <keithp@keithp.com>
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@ -538,6 +538,7 @@ msBlockHandler(ScreenPtr pScreen, void *pTimeout, void *pReadmask)
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pScreen->BlockHandler = ms->BlockHandler;
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pScreen->BlockHandler(pScreen, pTimeout, pReadmask);
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ms->BlockHandler = pScreen->BlockHandler;
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pScreen->BlockHandler = msBlockHandler;
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if (pScreen->isGPU)
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dispatch_slave_dirty(pScreen);
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