From: Trent Piepho <tpiepho@impinj.com>
Date: Thu, 4 Apr 2019 21:52:04 +0000 (+0000)
Subject: power: pfuze100: Fix off by one error in voltage table handling
X-Git-Tag: v2019.07~36^2~92
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d3eaf95ec67c8a7897052812ca30367cdf764c17;p=platform%2Fkernel%2Fu-boot.git

power: pfuze100: Fix off by one error in voltage table handling

The code that sets a regulator by looking up the voltage in a table had
an off by one error.  vsel_mask is a bitmask, not the number of table
entries, so a vsel_mask value of 0x7 indicates there are 8, not 7,
entries in the table.

Cc: Peng Fan <Peng.Fan@freescale.com>
Cc: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Trent Piepho <tpiepho@impinj.com>
---

diff --git a/drivers/power/regulator/pfuze100.c b/drivers/power/regulator/pfuze100.c
index 99073d6..d6d35f3 100644
--- a/drivers/power/regulator/pfuze100.c
+++ b/drivers/power/regulator/pfuze100.c
@@ -482,11 +482,11 @@ static int pfuze100_regulator_val(struct udevice *dev, int op, int *uV)
 		debug("Set voltage for REGULATOR_TYPE_FIXED regulator\n");
 		return -EINVAL;
 	} else if (desc->volt_table) {
-		for (i = 0; i < desc->vsel_mask; i++) {
+		for (i = 0; i <= desc->vsel_mask; i++) {
 			if (*uV == desc->volt_table[i])
 				break;
 		}
-		if (i == desc->vsel_mask) {
+		if (i == desc->vsel_mask + 1) {
 			debug("Unsupported voltage %u\n", *uV);
 			return -EINVAL;
 		}