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present: Check for NULL to prevent crash

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Closes: https://gitlab.freedesktop.org/xorg/xserver/-/issues/1275
Signed-off-by: Błażej Szczygieł <spaz16@wp.pl>
Tested-by: Aaron Plattner <aplattner@nvidia.com>
(cherry picked from commit 22d5818851)
This commit is contained in:
Błażej Szczygieł 2022-01-13 00:47:27 +01:00 • committed by Olivier Fourdan
parent 97c5b77774
commit d2ce97bd02
1 changed files with 6 additions and 0 deletions
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6
present/present_scmd.c
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@ -168,6 +168,9 @@ present_scmd_get_crtc(present_screen_priv_ptr screen_priv, WindowPtr window)
if (!screen_priv->info)
return NULL;
if (!screen_priv->info->get_crtc)
return NULL;
return (*screen_priv->info->get_crtc)(window);
}
@ -206,6 +209,9 @@ present_flush(WindowPtr window)
if (!screen_priv->info)
return;
if (!screen_priv->info->flush)
return;
(*screen_priv->info->flush) (window);
}