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In the function "pm3309c_parse_dt_node", when the dimming analog control mode (by I2C messages) is enabled, the local variable "prop_levels" is tested without any initialization, as indicated by the following smatch warning: drivers/video/backlight/mp3309c.c:279 pm3309c_parse_dt_node() error: uninitialized symbol 'prop_levels'. To avoid any problem in case of undefined behavior, we need to initialize it to "NULL". Reported-by: Dan Carpenter <dan.carpenter@linaro.org> Closes: https://lore.kernel.org/dri-devel/af0a1870-693b-442f-9b11-0503cfcd944a@moroto.mountain/ Fixes: 2e914516a58c ("backlight: mp3309c: Add support for MPS MP3309C") Signed-off-by: Flavio Suligoi <f.suligoi@asem.it> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Link: https://lore.kernel.org/r/20231129164514.2772719-1-f.suligoi@asem.it Signed-off-by: Lee Jones <lee@kernel.org>