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drm/i915/display: Add default case to mipi_exec_send_packet

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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 <jonathan.cavitt@intel.com>
Fixes: 23db1577ce ("drm/i915/dsi: log send packet sequence errors")
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patch.msgid.link/20251104164150.16795-2-jonathan.cavitt@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
This commit is contained in:
Jonathan Cavitt 2025-11-04 16:41:51 +00:00 committed by Jani Nikula
parent 38759cc5ad
commit b84befa312
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/i915/display/intel_dsi_vbt.c
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@ -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)