From b84befa3126634d78e31260f538453d534742908 Mon Sep 17 00:00:00 2001 From: Jonathan Cavitt Date: Tue, 4 Nov 2025 16:41:51 +0000 Subject: [PATCH] drm/i915/display: Add default case to mipi_exec_send_packet Add a default case to the switch case statement in mipi_exec_send_packet to prevent attempts to read an uninitialized ret value. It's unlikely the default case will ever occur during regular exeuction, but if more MIPI DSI Processor-to-Peripheral transaction types are ever added, then having this in place will be a useful safety guard. Signed-off-by: Jonathan Cavitt Fixes: 23db1577ce2d ("drm/i915/dsi: log send packet sequence errors") Reviewed-by: Jani Nikula Link: https://patch.msgid.link/20251104164150.16795-2-jonathan.cavitt@intel.com Signed-off-by: Jani Nikula --- drivers/gpu/drm/i915/display/intel_dsi_vbt.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c index 31edf57a296fc..4b815ce6b1fe2 100644 --- a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c +++ b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c @@ -171,6 +171,9 @@ static const u8 *mipi_exec_send_packet(struct intel_dsi *intel_dsi, case MIPI_DSI_DCS_LONG_WRITE: ret = mipi_dsi_dcs_write_buffer(dsi_device, data, len); break; + default: + ret = -EINVAL; + break; } if (ret < 0) -- 2.47.3