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net: pse-pd: Fix deadlock in current limit functions

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commit 488fb6effe03e20f38d34da7425de77bbd3e2665 upstream.

Fix a deadlock in pse_pi_get_current_limit and pse_pi_set_current_limit
caused by consecutive mutex_lock calls. One in the function itself and
another in pse_pi_get_voltage.

Resolve the issue by using the unlocked version of pse_pi_get_voltage
instead.

Fixes: e0a5e2bba38a ("net: pse-pd: Use power limit at driver side instead of current limit")
Signed-off-by: Kory Maincent <kory.maincent@bootlin.com>
Link: https://patch.msgid.link/20250212151751.1515008-1-kory.maincent@bootlin.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Kory Maincent
2025-02-12 16:17:51 +01:00
committed by Greg Kroah-Hartman
parent 384c8291f7
commit 4abbe664a1
1 changed files with 2 additions and 2 deletions
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drivers/net/pse-pd/pse_core.c
+2 -2
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@@ -309,7 +309,7 @@ static int pse_pi_get_current_limit(struct regulator_dev *rdev)
goto out;
mW = ret;
ret = pse_pi_get_voltage(rdev);
ret = _pse_pi_get_voltage(rdev);
if (!ret) {
dev_err(pcdev->dev, "Voltage null\n");
ret = -ERANGE;
@@ -346,7 +346,7 @@ static int pse_pi_set_current_limit(struct regulator_dev *rdev, int min_uA,
id = rdev_get_id(rdev);
mutex_lock(&pcdev->lock);
ret = pse_pi_get_voltage(rdev);
ret = _pse_pi_get_voltage(rdev);
if (!ret) {
dev_err(pcdev->dev, "Voltage null\n");
ret = -ERANGE;