Instead of exiting the loop as expected when an entry is found, the
list_for_each_entry() continues until the traversal is complete. It
could lead to a invalid reference to 'ddi_select' after the loop, and
could lead to multiple 'is_*' flags being set with true mistakely, too.
The invalid reference to 'ddi_select' is here:
cdv_dpll_set_clock_cdv(dev, crtc, &clock, is_lvds, ddi_select);
To fix this, when found the entry, add a break after the switch statement.
Fixes: d66760962d75 ("gma500: Program the DPLL lane based on the selected digitial port")
Signed-off-by: Xiaomeng Tong <xiam0nd.tong@xxxxxxxxx>
---
drivers/gpu/drm/gma500/cdv_intel_display.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/gma500/cdv_intel_display.c b/drivers/gpu/drm/gma500/cdv_intel_display.c
index 94ebc48a4349..3e93019b17cb 100644
--- a/drivers/gpu/drm/gma500/cdv_intel_display.c
+++ b/drivers/gpu/drm/gma500/cdv_intel_display.c
@@ -616,6 +616,8 @@ static int cdv_intel_crtc_mode_set(struct drm_crtc *crtc,
DRM_ERROR("invalid output type.\n");
return 0;
}
+
+ break;
}
if (dev_priv->dplla_96mhz)
--
2.17.1
