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drm: fixes crct set_mode when encoder mode_fixup is null.

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Avoids null crash when encoders don't implement mode_fixup.

Signed-off-by: Carlos Palminha <palminha@synopsys.com>
[danvet: Also update kerneldoc.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1455106522-32307-1-git-send-email-palminha@synopsys.com
This commit is contained in:
Carlos Palminha
2016-02-10 12:15:22 +00:00
committed by Daniel Vetter
parent 71dfb744bd
commit 3c5b267314
2 changed files with 7 additions and 5 deletions
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10
drivers/gpu/drm/drm_crtc_helper.c
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@@ -337,10 +337,12 @@ bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
}
encoder_funcs = encoder->helper_private;
if (!(ret = encoder_funcs->mode_fixup(encoder, mode,
adjusted_mode))) {
DRM_DEBUG_KMS("Encoder fixup failed\n");
goto done;
if (encoder_funcs->mode_fixup) {
if (!(ret = encoder_funcs->mode_fixup(encoder, mode,
adjusted_mode))) {
DRM_DEBUG_KMS("Encoder fixup failed\n");
goto done;
}
}
}