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([183.91.15.56]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-cbbb66b5ffesm2959018a12.19.2026.07.27.02.43.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 27 Jul 2026 02:43:36 -0700 (PDT) From: phucduc.bui@gmail.com To: Mark Brown , Liam Girdwood , Jaroslav Kysela , Takashi Iwai , Lars-Peter Clausen , nuno.sa@analog.com, Shenghao Ding , Kevin Lu Cc: Baojun Xu , Sen Wang , Steven Eckhoff , Srinivas Kandagatla , Kuninori Morimoto , Charles Keepax , Linus Walleij , u.kleine-koenig@baylibre.com, Thorsten Blum , Kees Cook , Chen Ni , Bartosz Golaszewski , Shengjiu Wang , Sebastian Krzyszkowiak , Pengpeng Hou , Richard Fitzgerald , patches@opensource.cirrus.com, linux-kernel@vger.kernel.org, linux-sound@vger.kernel.org, linux-arm-msm@vger.kernel.org, bui duc phuc Subject: [PATCH v2 11/26] ASoC: codecs: wcd-mbhc: Use guard() for mutex locks Date: Mon, 27 Jul 2026 16:40:31 +0700 Message-ID: <20260727094046.23001-12-phucduc.bui@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260727094046.23001-1-phucduc.bui@gmail.com> References: <20260727094046.23001-1-phucduc.bui@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: bui duc phuc Clean up the code using guard() for mutex locks. Merely code refactoring, and no behavior change. Signed-off-by: bui duc phuc --- sound/soc/codecs/wcd-mbhc-v2.c | 140 ++++++++++++++++----------------- 1 file changed, 66 insertions(+), 74 deletions(-) diff --git a/sound/soc/codecs/wcd-mbhc-v2.c b/sound/soc/codecs/wcd-mbhc-v2.c index bb0c8478a8eb..1b7d481e5132 100644 --- a/sound/soc/codecs/wcd-mbhc-v2.c +++ b/sound/soc/codecs/wcd-mbhc-v2.c @@ -1,6 +1,7 @@ // SPDX-License-Identifier: GPL-2.0-only // Copyright (c) 2015-2021, The Linux Foundation. All rights reserved. +#include #include #include #include @@ -419,9 +420,8 @@ static void wcd_cancel_hs_detect_plug(struct wcd_mbhc *mbhc, struct work_struct *work) { mbhc->hs_detect_work_stop = true; - mutex_unlock(&mbhc->lock); + guard(mutex)(&mbhc->lock); cancel_work_sync(work); - mutex_lock(&mbhc->lock); } static void wcd_mbhc_cancel_pending_work(struct wcd_mbhc *mbhc) @@ -458,7 +458,7 @@ static void wcd_mbhc_find_plug_and_report(struct wcd_mbhc *mbhc, if (mbhc->current_plug == plug_type) return; - mutex_lock(&mbhc->lock); + guard(mutex)(&mbhc->lock); switch (plug_type) { case MBHC_PLUG_TYPE_HEADPHONE: @@ -481,7 +481,6 @@ static void wcd_mbhc_find_plug_and_report(struct wcd_mbhc *mbhc, mbhc->current_plug, plug_type); break; } - mutex_unlock(&mbhc->lock); } static void wcd_schedule_hs_detect_plug(struct wcd_mbhc *mbhc, @@ -673,29 +672,28 @@ static irqreturn_t wcd_mbhc_btn_press_handler(int irq, void *data) int mask; unsigned long msec_val; - mutex_lock(&mbhc->lock); + guard(mutex)(&mbhc->lock); wcd_cancel_btn_work(mbhc); mbhc->is_btn_press = true; msec_val = jiffies_to_msecs(jiffies - mbhc->jiffies_atreport); /* Too short, ignore button press */ if (msec_val < MBHC_BUTTON_PRESS_THRESHOLD_MIN) - goto done; + return IRQ_HANDLED; /* If switch interrupt already kicked in, ignore button press */ if (mbhc->in_swch_irq_handler) - goto done; + return IRQ_HANDLED; /* Plug isn't headset, ignore button press */ if (mbhc->current_plug != MBHC_PLUG_TYPE_HEADSET) - goto done; + return IRQ_HANDLED; mask = wcd_mbhc_get_button_mask(mbhc); mbhc->buttons_pressed |= mask; if (schedule_delayed_work(&mbhc->mbhc_btn_dwork, msecs_to_jiffies(400)) == 0) WARN(1, "Button pressed twice without release event\n"); -done: - mutex_unlock(&mbhc->lock); + return IRQ_HANDLED; } @@ -704,14 +702,14 @@ static irqreturn_t wcd_mbhc_btn_release_handler(int irq, void *data) struct wcd_mbhc *mbhc = data; int ret; - mutex_lock(&mbhc->lock); + guard(mutex)(&mbhc->lock); if (mbhc->is_btn_press) mbhc->is_btn_press = false; else /* fake btn press */ - goto exit; + return IRQ_HANDLED; if (!(mbhc->buttons_pressed & WCD_MBHC_JACK_BUTTON_MASK)) - goto exit; + return IRQ_HANDLED; ret = wcd_cancel_btn_work(mbhc); if (ret == 0) { /* Reporting long button release event */ @@ -725,8 +723,6 @@ static irqreturn_t wcd_mbhc_btn_release_handler(int irq, void *data) } } mbhc->buttons_pressed &= ~WCD_MBHC_JACK_BUTTON_MASK; -exit: - mutex_unlock(&mbhc->lock); return IRQ_HANDLED; } @@ -768,62 +764,60 @@ static int wcd_mbhc_initialise(struct wcd_mbhc *mbhc) return ret; } - mutex_lock(&mbhc->lock); - - if (mbhc->cfg->typec_analog_mux) - mbhc->swap_thr = GND_MIC_USBC_SWAP_THRESHOLD; - else - mbhc->swap_thr = GND_MIC_SWAP_THRESHOLD; - - /* setup HS detection */ - if (mbhc->mbhc_cb->hph_pull_up_control_v2) - mbhc->mbhc_cb->hph_pull_up_control_v2(component, - mbhc->cfg->typec_analog_mux ? - HS_PULLUP_I_OFF : HS_PULLUP_I_DEFAULT); - else if (mbhc->mbhc_cb->hph_pull_up_control) - mbhc->mbhc_cb->hph_pull_up_control(component, - mbhc->cfg->typec_analog_mux ? - I_OFF : I_DEFAULT); - else - wcd_mbhc_write_field(mbhc, WCD_MBHC_HS_L_DET_PULL_UP_CTRL, - mbhc->cfg->typec_analog_mux ? 0 : 3); - - wcd_mbhc_write_field(mbhc, WCD_MBHC_HPHL_PLUG_TYPE, mbhc->cfg->hphl_swh); - wcd_mbhc_write_field(mbhc, WCD_MBHC_GND_PLUG_TYPE, mbhc->cfg->gnd_swh); - wcd_mbhc_write_field(mbhc, WCD_MBHC_SW_HPH_LP_100K_TO_GND, 1); - if (mbhc->cfg->gnd_det_en && mbhc->mbhc_cb->mbhc_gnd_det_ctrl) - mbhc->mbhc_cb->mbhc_gnd_det_ctrl(component, true); - wcd_mbhc_write_field(mbhc, WCD_MBHC_HS_L_DET_PULL_UP_COMP_CTRL, 1); - - /* Plug detect is triggered manually if analog goes through USBCC */ - if (mbhc->cfg->typec_analog_mux) - wcd_mbhc_write_field(mbhc, WCD_MBHC_L_DET_EN, 0); - else - wcd_mbhc_write_field(mbhc, WCD_MBHC_L_DET_EN, 1); - - if (mbhc->cfg->typec_analog_mux) - /* Insertion debounce set to 48ms */ - wcd_mbhc_write_field(mbhc, WCD_MBHC_INSREM_DBNC, 4); - else - /* Insertion debounce set to 96ms */ - wcd_mbhc_write_field(mbhc, WCD_MBHC_INSREM_DBNC, 6); + scoped_guard(mutex, &mbhc->lock) { + if (mbhc->cfg->typec_analog_mux) + mbhc->swap_thr = GND_MIC_USBC_SWAP_THRESHOLD; + else + mbhc->swap_thr = GND_MIC_SWAP_THRESHOLD; + + /* setup HS detection */ + if (mbhc->mbhc_cb->hph_pull_up_control_v2) + mbhc->mbhc_cb->hph_pull_up_control_v2(component, + mbhc->cfg->typec_analog_mux ? + HS_PULLUP_I_OFF : HS_PULLUP_I_DEFAULT); + else if (mbhc->mbhc_cb->hph_pull_up_control) + mbhc->mbhc_cb->hph_pull_up_control(component, + mbhc->cfg->typec_analog_mux ? + I_OFF : I_DEFAULT); + else + wcd_mbhc_write_field(mbhc, WCD_MBHC_HS_L_DET_PULL_UP_CTRL, + mbhc->cfg->typec_analog_mux ? 0 : 3); + + wcd_mbhc_write_field(mbhc, WCD_MBHC_HPHL_PLUG_TYPE, mbhc->cfg->hphl_swh); + wcd_mbhc_write_field(mbhc, WCD_MBHC_GND_PLUG_TYPE, mbhc->cfg->gnd_swh); + wcd_mbhc_write_field(mbhc, WCD_MBHC_SW_HPH_LP_100K_TO_GND, 1); + if (mbhc->cfg->gnd_det_en && mbhc->mbhc_cb->mbhc_gnd_det_ctrl) + mbhc->mbhc_cb->mbhc_gnd_det_ctrl(component, true); + wcd_mbhc_write_field(mbhc, WCD_MBHC_HS_L_DET_PULL_UP_COMP_CTRL, 1); + + /* Plug detect is triggered manually if analog goes through USBCC */ + if (mbhc->cfg->typec_analog_mux) + wcd_mbhc_write_field(mbhc, WCD_MBHC_L_DET_EN, 0); + else + wcd_mbhc_write_field(mbhc, WCD_MBHC_L_DET_EN, 1); - /* Button Debounce set to 16ms */ - wcd_mbhc_write_field(mbhc, WCD_MBHC_BTN_DBNC, 2); + if (mbhc->cfg->typec_analog_mux) + /* Insertion debounce set to 48ms */ + wcd_mbhc_write_field(mbhc, WCD_MBHC_INSREM_DBNC, 4); + else + /* Insertion debounce set to 96ms */ + wcd_mbhc_write_field(mbhc, WCD_MBHC_INSREM_DBNC, 6); - /* enable bias */ - mbhc->mbhc_cb->mbhc_bias(component, true); - /* enable MBHC clock */ - if (mbhc->mbhc_cb->clk_setup) - mbhc->mbhc_cb->clk_setup(component, - mbhc->cfg->typec_analog_mux ? false : true); + /* Button Debounce set to 16ms */ + wcd_mbhc_write_field(mbhc, WCD_MBHC_BTN_DBNC, 2); - /* program HS_VREF value */ - wcd_program_hs_vref(mbhc); + /* enable bias */ + mbhc->mbhc_cb->mbhc_bias(component, true); + /* enable MBHC clock */ + if (mbhc->mbhc_cb->clk_setup) + mbhc->mbhc_cb->clk_setup(component, + mbhc->cfg->typec_analog_mux ? false : true); - wcd_program_btn_threshold(mbhc, false); + /* program HS_VREF value */ + wcd_program_hs_vref(mbhc); - mutex_unlock(&mbhc->lock); + wcd_program_btn_threshold(mbhc, false); + } pm_runtime_put_autosuspend(component->dev); @@ -1327,7 +1321,7 @@ static irqreturn_t wcd_mbhc_adc_hs_rem_irq(int irq, void *data) unsigned long timeout; int adc_threshold, output_mv, retry = 0; - mutex_lock(&mbhc->lock); + guard(mutex)(&mbhc->lock); timeout = jiffies + msecs_to_jiffies(WCD_FAKE_REMOVAL_MIN_PERIOD_MS); adc_threshold = wcd_mbhc_adc_get_hs_thres(mbhc); @@ -1342,7 +1336,7 @@ static irqreturn_t wcd_mbhc_adc_hs_rem_irq(int irq, void *data) /* Check for fake removal */ if ((output_mv <= adc_threshold) && retry > FAKE_REM_RETRY_ATTEMPTS) - goto exit; + return IRQ_HANDLED; } while (!time_after(jiffies, timeout)); /* @@ -1359,8 +1353,6 @@ static irqreturn_t wcd_mbhc_adc_hs_rem_irq(int irq, void *data) wcd_mbhc_elec_hs_report_unplug(mbhc); wcd_mbhc_write_field(mbhc, WCD_MBHC_BTN_ISRC_CTL, 0); -exit: - mutex_unlock(&mbhc->lock); return IRQ_HANDLED; } @@ -1622,10 +1614,10 @@ void wcd_mbhc_deinit(struct wcd_mbhc *mbhc) free_irq(mbhc->intr_ids->mbhc_btn_press_intr, mbhc); free_irq(mbhc->intr_ids->mbhc_sw_intr, mbhc); - mutex_lock(&mbhc->lock); - wcd_cancel_hs_detect_plug(mbhc, &mbhc->correct_plug_swch); - cancel_work_sync(&mbhc->mbhc_plug_detect_work); - mutex_unlock(&mbhc->lock); + scoped_guard(mutex, &mbhc->lock) { + wcd_cancel_hs_detect_plug(mbhc, &mbhc->correct_plug_swch); + cancel_work_sync(&mbhc->mbhc_plug_detect_work); + } kfree(mbhc); } -- 2.43.0