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Message-ID: <1574850165-13135-1-git-send-email-yannick.fertre@st.com>
Date: Wed, 27 Nov 2019 11:22:45 +0100
From: Yannick Fertre <yannick.fertre@...com>
To: Yannick Fertre <yannick.fertre@...com>,
Philippe Cornu <philippe.cornu@...com>,
Benjamin Gaignard <benjamin.gaignard@...com>,
David Airlie <airlied@...ux.ie>,
Daniel Vetter <daniel@...ll.ch>,
Maxime Coquelin <mcoquelin.stm32@...il.com>,
Alexandre Torgue <alexandre.torgue@...com>,
<dri-devel@...ts.freedesktop.org>,
<linux-stm32@...md-mailman.stormreply.com>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>
Subject: [PATCH] drm/bridge/synopsys: dsi: check post disable
From: Yannick Fertré <yannick.fertre@...com>
Some bridges did not registered the post_disable function.
To avoid a crash, check it before calling.
Signed-off-by: Yannick Fertre <yannick.fertre@...com>
---
drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
index cc806ba..1e37233 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
@@ -886,7 +886,8 @@ static void dw_mipi_dsi_bridge_post_disable(struct drm_bridge *bridge)
* This needs to be fixed in the drm_bridge framework and the API
* needs to be updated to manage our own call chains...
*/
- dsi->panel_bridge->funcs->post_disable(dsi->panel_bridge);
+ if (dsi->panel_bridge->funcs->post_disable)
+ dsi->panel_bridge->funcs->post_disable(dsi->panel_bridge);
if (dsi->slave) {
dw_mipi_dsi_disable(dsi->slave);
--
2.7.4
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