[PATCH v9 09/22] drm/bridge: synopsys: dw-dp: Free output_fmts when none are valid
Sebastian Reichel <[email protected]> Mon, 03 Aug 2026 20:05:10 +0200
| Newsgroups | org.infradead.lists.linux-rockchip,org.freedesktop.lists.dri-devel,org.infradead.lists.linux-arm-kernel,org.kernel.vger.linux-devicetree,org.kernel.vger.linux-kernel |
|---|---|
| Message-ID | <20260803-synopsys-dw-dp-improvements-v9-9-2e6e46135312@collabora.com> |
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 <[email protected]>
Signed-off-by: Sebastian Reichel <[email protected]>
---
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
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