Hello Olliver Schinagl, This is a semi-automatic email about new static checker warnings. The patch d29f54df8b16: "regulator: axp20x: add support for set_ramp_delay for AXP209" from Dec 11, 2018, leads to the following Smatch complaint: drivers/regulator/axp20x-regulator.c:375 axp20x_set_ramp_delay() warn: variable dereferenced before check 'rdev' (see line 369) drivers/regulator/axp20x-regulator.c 368 { 369 struct axp20x_dev *axp20x = rdev_get_drvdata(rdev); ^^^^ 370 const struct regulator_desc *desc = rdev->desc; ^^^^^^^^^^ Dereferences 371 u8 reg, mask, enable, cfg = 0xff; 372 const int *slew_rates; 373 int rate_count = 0; 374 375 if (!rdev) ^^^^^ Check too late. 376 return -EINVAL; 377 regards, dan carpenter