mtd: rawnand: timings: Make onfi_fill_interface_config() a void helper

Warn the user if the parameters are wrong but basically it would mean
there is a serious issue in the NAND core. So no need to ever check
its output, let's make this helper return void.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Link: https://lore.kernel.org/linux-mtd/20200529111322.7184-21-miquel.raynal@bootlin.com

drivers/mtd/nand/raw/internals.h

@@ -84,7 +84,7 @@ int nand_bbm_get_next_page(struct nand_chip *chip, int page);
 int nand_markbad_bbm(struct nand_chip *chip, loff_t ofs);
 int nand_erase_nand(struct nand_chip *chip, struct erase_info *instr,
 		    int allowbbt);
-int onfi_fill_interface_config(struct nand_chip *chip,
+void onfi_fill_interface_config(struct nand_chip *chip,
 				struct nand_interface_config *iface,
 				enum nand_interface_type type,
 				unsigned int timing_mode);

drivers/mtd/nand/raw/nand_base.c

@@ -1041,10 +1041,8 @@ static int nand_choose_interface_config(struct nand_chip *chip)
 	}
 
 	for (mode = fls(modes) - 1; mode >= 0; mode--) {
-		ret = onfi_fill_interface_config(chip, &chip->interface_config,
+		onfi_fill_interface_config(chip, &chip->interface_config,
 					   NAND_SDR_IFACE, mode);
-		if (ret)
-			continue;
 
 		/*
 		 * Pass NAND_DATA_IFACE_CHECK_ONLY to only check if the

drivers/mtd/nand/raw/nand_timings.c

@@ -347,18 +347,18 @@ onfi_find_closest_sdr_mode(const struct nand_sdr_timings *spec_timings)
  * @type: The interface type
  * @timing_mode: The ONFI timing mode
  */
-int onfi_fill_interface_config(struct nand_chip *chip,
+void onfi_fill_interface_config(struct nand_chip *chip,
 				struct nand_interface_config *iface,
 				enum nand_interface_type type,
 				unsigned int timing_mode)
 {
 	struct onfi_params *onfi = chip->parameters.onfi;
 
-	if (type != NAND_SDR_IFACE)
-		return -EINVAL;
+	if (WARN_ON(type != NAND_SDR_IFACE))
+		return;
 
-	if (timing_mode >= ARRAY_SIZE(onfi_sdr_timings))
-		return -EINVAL;
+	if (WARN_ON(timing_mode >= ARRAY_SIZE(onfi_sdr_timings)))
+		return;
 
 	*iface = onfi_sdr_timings[timing_mode];
 
@@ -378,6 +378,4 @@ int onfi_fill_interface_config(struct nand_chip *chip,
 		/* nanoseconds -> picoseconds */
 		timings->tCCS_min = 1000UL * onfi->tCCS;
 	}
-
-	return 0;
 }