static const u16 DFLT_STICK_CAL_CEN = 2000;
 static const u16 DFLT_STICK_CAL_MAX = 3500;
 static const u16 DFLT_STICK_CAL_MIN = 500;
+static void joycon_use_default_calibration(struct joycon_ctlr *ctlr,
+                                          struct joycon_stick_cal *cal_x,
+                                          struct joycon_stick_cal *cal_y,
+                                          const char *stick, int ret)
+{
+       hid_warn(ctlr->hdev,
+                "Failed to read %s stick cal, "
+                "using defaults; e=%d\n",
+                stick, ret);
+

Sorry, missed this on my first readthrough. I think the coding style
mentions not to break up the logged string into multiple lines, since
it'll harm greppability.

-Daniel