Thread (4 messages) flat view 4 messages, 2 authors, 2021-08-25
STALE1825d LANDED

Landed in mainline as 98e47570ba98 on 2021-08-25.

[PATCH 1/2] regulator: vctrl: Use locked regulator_get_voltage in probe path

From: Chen-Yu Tsai <wenst@chromium.org>
Date: 2021-08-25 03:37:31
Also in: linux-rockchip, lkml
Subsystem: the rest, voltage and current regulator framework · Maintainers: Linus Torvalds, Liam Girdwood, Mark Brown

In commit e9153311491d ("regulator: vctrl-regulator: Avoid deadlock getting
and setting the voltage"), all calls to get/set the voltage of the
control regulator were switched to unlocked versions to avoid deadlocks.
However, the call in the probe path is done without regulator locks
held. In this case the locked version should be used.

Switch back to the locked regulator_get_voltage() in the probe path to
avoid any mishaps.

Fixes: e9153311491d ("regulator: vctrl-regulator: Avoid deadlock getting and setting the voltage")
Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
---
 drivers/regulator/vctrl-regulator.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/regulator/vctrl-regulator.c b/drivers/regulator/vctrl-regulator.c
index cbadb1c99679..93d33201ffe0 100644
--- a/drivers/regulator/vctrl-regulator.c
+++ b/drivers/regulator/vctrl-regulator.c
@@ -490,7 +490,8 @@ static int vctrl_probe(struct platform_device *pdev)
 		if (ret)
 			return ret;
 
-		ctrl_uV = regulator_get_voltage_rdev(vctrl->ctrl_reg->rdev);
+		/* Use locked consumer API when not in regulator framework */
+		ctrl_uV = regulator_get_voltage(vctrl->ctrl_reg);
 		if (ctrl_uV < 0) {
 			dev_err(&pdev->dev, "failed to get control voltage\n");
 			return ctrl_uV;
-- 
2.33.0.rc2.250.ged5fa647cd-goog


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