[PATCH v9 09/22] drm/bridge: synopsys: dw-dp: Free output_fmts when none are valid

[Sebastian Reichel]

If dw_dp_bandwidth_ok() returns false for all formats, *num_output_fmts
might end up becoming 0. In this case functions calling it assume that
nothing needs to be free'd, so free output_fmts within the function to
avoid leaking memory.

Fixes: 86eecc3a9c2e ("drm/bridge: synopsys: Add DW DPTX Controller support library")
Reported-by: Sashiko <sashiko-bot at kernel.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel at collabora.com>
---
 drivers/gpu/drm/bridge/synopsys/dw-dp.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-dp.c b/drivers/gpu/drm/bridge/synopsys/dw-dp.c
index 22a244de08aa..bde938b0d116 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-dp.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-dp.c
@@ -1813,6 +1813,11 @@ static u32 *dw_dp_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
 		output_fmts[j++] = fmt->bus_format;
 	}
 
+	if (j == 0) {
+		kfree(output_fmts);
+		output_fmts = NULL;
+	}
+
 	*num_output_fmts = j;
 
 	return output_fmts;

-- 
2.53.0