at91: kernel v5.15: copy config and patches from 5.10

[openwrt/openwrt.git] / target / linux / at91 / patches-5.15 / 127-regulator-core-validate-selector-against-linear_min_.patch

diff --git a/target/linux/at91/patches-5.15/127-regulator-core-validate-selector-against-linear_min_.patch b/target/linux/at91/patches-5.15/127-regulator-core-validate-selector-against-linear_min_.patch
new file mode 100644 (file)
index 0000000..14eedb0
--- /dev/null
+++ b/target/linux/at91/patches-5.15/127-regulator-core-validate-selector-against-linear_min_.patch
@@ -0,0 +1,64 @@
+From 3aee4f22ed0a22d3d6d22fc49812c03d876c7637 Mon Sep 17 00:00:00 2001
+From: Claudiu Beznea <claudiu.beznea@microchip.com>
+Date: Fri, 13 Nov 2020 17:21:05 +0200
+Subject: [PATCH 127/247] regulator: core: validate selector against
+ linear_min_sel
+
+There are regulators who's min selector is not zero. Selectors loops
+(looping b/w zero and regulator::desc::n_voltages) might throw errors
+because invalid selectors are used (lower than
+regulator::desc::linear_min_sel). For this situations validate selectors
+against regulator::desc::linear_min_sel.
+
+Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
+Link: https://lore.kernel.org/r/1605280870-32432-2-git-send-email-claudiu.beznea@microchip.com
+Signed-off-by: Mark Brown <broonie@kernel.org>
+---
+ drivers/regulator/core.c    | 9 +++++++--
+ drivers/regulator/helpers.c | 3 ++-
+ 2 files changed, 9 insertions(+), 3 deletions(-)
+
+--- a/drivers/regulator/core.c
++++ b/drivers/regulator/core.c
+@@ -2992,7 +2992,8 @@ static int _regulator_list_voltage(struc
+               return rdev->desc->fixed_uV;
+ 
+       if (ops->list_voltage) {
+-              if (selector >= rdev->desc->n_voltages)
++              if (selector >= rdev->desc->n_voltages ||
++                  selector < rdev->desc->linear_min_sel)
+                       return -EINVAL;
+               if (lock)
+                       regulator_lock(rdev);
+@@ -3143,7 +3144,8 @@ int regulator_list_hardware_vsel(struct
+       struct regulator_dev *rdev = regulator->rdev;
+       const struct regulator_ops *ops = rdev->desc->ops;
+ 
+-      if (selector >= rdev->desc->n_voltages)
++      if (selector >= rdev->desc->n_voltages ||
++          selector < rdev->desc->linear_min_sel)
+               return -EINVAL;
+       if (ops->set_voltage_sel != regulator_set_voltage_sel_regmap)
+               return -EOPNOTSUPP;
+@@ -4066,6 +4068,9 @@ int regulator_set_voltage_time(struct re
+ 
+       for (i = 0; i < rdev->desc->n_voltages; i++) {
+               /* We only look for exact voltage matches here */
++              if (i < rdev->desc->linear_min_sel)
++                      continue;
++
+               voltage = regulator_list_voltage(regulator, i);
+               if (voltage < 0)
+                       return -EINVAL;
+--- a/drivers/regulator/helpers.c
++++ b/drivers/regulator/helpers.c
+@@ -647,7 +647,8 @@ int regulator_list_voltage_table(struct
+               return -EINVAL;
+       }
+ 
+-      if (selector >= rdev->desc->n_voltages)
++      if (selector >= rdev->desc->n_voltages ||
++          selector < rdev->desc->linear_min_sel)
+               return -EINVAL;
+ 
+       return rdev->desc->volt_table[selector];