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Charlie-cy WuandFelix Fietkau
da1c4a2e00
Split mt7921_mcu_regd_update() into two functions to prevent recursive
mutex acquisition. Introduce __mt7921_mcu_regd_update() as the internal
implementation that assumes the mutex is already held by the caller,
while mt7921_mcu_regd_update() remains as the external interface that
handles mutex acquisition and release.
This fixes a deadlock issue when mt7921_regd_set_6ghz_power_type() is
called with the device mutex already held. Without this change, calling
mt7921_mcu_regd_update() would attempt to acquire the same mutex again,
causing a recursive lock deadlock.
The __mt7921_mcu_regd_update() function can be safely called when the
caller has already acquired the device mutex, avoiding the deadlock
while maintaining proper synchronization for regulatory domain updates.
Fixes: dc2608cf5224 ("wifi: mt76: mt7921: refactor regulatory notifier flow")
Signed-off-by: Charlie-cy Wu <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Felix Fietkau <[email protected]>
22 lines
679 B
C
22 lines
679 B
C
/* SPDX-License-Identifier: BSD-3-Clause-Clear */
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/* Copyright (C) 2025 MediaTek Inc. */
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#ifndef __MT7921_REGD_H
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#define __MT7921_REGD_H
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struct mt792x_dev;
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struct wiphy;
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struct regulatory_request;
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int mt7921_mcu_regd_update(struct mt792x_dev *dev, u8 *alpha2,
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enum environment_cap country_ie_env);
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int __mt7921_mcu_regd_update(struct mt792x_dev *dev, u8 *alpha2,
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enum environment_cap country_ie_env);
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void mt7921_regd_notifier(struct wiphy *wiphy,
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struct regulatory_request *request);
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bool mt7921_regd_clc_supported(struct mt792x_dev *dev);
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int mt7921_regd_change(struct mt792x_phy *phy, char *alpha2);
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int mt7921_regd_init(struct mt792x_phy *phy);
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#endif
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