[PATCH 6/8] ASoC: codecs: wcd-mbhc-v2: fix resource leaks on component remove

Johan Hovold
2023-07-05T12:33:32Z

The MBHC resources must be released on component probe failure and
removal so can not be tied to the lifetime of the component device.

This is specifically needed to allow probe deferrals of the sound card
which otherwise fails when reprobing the codec component:

snd-sc8280xp sound: ASoC: failed to instantiate card -517
genirq: Flags mismatch irq 299. 00002001 (mbhc sw intr) vs. 00002001 (mbhc sw intr)
wcd938x_codec audio-codec: Failed to request mbhc interrupts -16
wcd938x_codec audio-codec: mbhc initialization failed
wcd938x_codec audio-codec: ASoC: error at snd_soc_component_probe on audio-codec: -16
snd-sc8280xp sound: ASoC: failed to instantiate card -16

Fixes: 0e5c9e7ff899 ("ASoC: codecs: wcd: add multi button Headset detection support")
Cc: stable@vger.kernel.org # 5.14
Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
---
sound/soc/codecs/wcd-mbhc-v2.c | 57 ++++++++++++++++++++++++----------
1 file changed, 41 insertions(+), 16 deletions(-)

diff --git a/sound/soc/codecs/wcd-mbhc-v2.c b/sound/soc/codecs/wcd-mbhc-v2.c
index 1911750f7445..5da1934527f3 100644
--- a/sound/soc/codecs/wcd-mbhc-v2.c
+++ b/sound/soc/codecs/wcd-mbhc-v2.c
@@ -1454,7 +1454,7 @@ struct wcd_mbhc *wcd_mbhc_init(struct snd_soc_component *component,
return ERR_PTR(-EINVAL);
}

- mbhc = devm_kzalloc(dev, sizeof(*mbhc), GFP_KERNEL);
+ mbhc = kzalloc(sizeof(*mbhc), GFP_KERNEL);
if (!mbhc)
return ERR_PTR(-ENOMEM);

@@ -1474,61 +1474,76 @@ struct wcd_mbhc *wcd_mbhc_init(struct snd_soc_component *component,

INIT_WORK(&mbhc->correct_plug_swch, wcd_correct_swch_plug);

- ret = devm_request_threaded_irq(dev, mbhc->intr_ids->mbhc_sw_intr, NULL,
+ ret = request_threaded_irq(mbhc->intr_ids->mbhc_sw_intr, NULL,
wcd_mbhc_mech_plug_detect_irq,
IRQF_ONESHOT | IRQF_TRIGGER_RISING,
"mbhc sw intr", mbhc);
if (ret)
- goto err;
+ goto err_free_mbhc;

- ret = devm_request_threaded_irq(dev, mbhc->intr_ids->mbhc_btn_press_intr, NULL,
+ ret = request_threaded_irq(mbhc->intr_ids->mbhc_btn_press_intr, NULL,
wcd_mbhc_btn_press_handler,
IRQF_ONESHOT | IRQF_TRIGGER_RISING,
"Button Press detect", mbhc);
if (ret)
- goto err;
+ goto err_free_sw_intr;

- ret = devm_request_threaded_irq(dev, mbhc->intr_ids->mbhc_btn_release_intr, NULL,
+ ret = request_threaded_irq(mbhc->intr_ids->mbhc_btn_release_intr, NULL,
wcd_mbhc_btn_release_handler,
IRQF_ONESHOT | IRQF_TRIGGER_RISING,
"Button Release detect", mbhc);
if (ret)
- goto err;
+ goto err_free_btn_press_intr;

- ret = devm_request_threaded_irq(dev, mbhc->intr_ids->mbhc_hs_ins_intr, NULL,
+ ret = request_threaded_irq(mbhc->intr_ids->mbhc_hs_ins_intr, NULL,
wcd_mbhc_adc_hs_ins_irq,
IRQF_ONESHOT | IRQF_TRIGGER_RISING,
"Elect Insert", mbhc);
if (ret)
- goto err;
+ goto err_free_btn_release_intr;

disable_irq_nosync(mbhc->intr_ids->mbhc_hs_ins_intr);

- ret = devm_request_threaded_irq(dev, mbhc->intr_ids->mbhc_hs_rem_intr, NULL,
+ ret = request_threaded_irq(mbhc->intr_ids->mbhc_hs_rem_intr, NULL,
wcd_mbhc_adc_hs_rem_irq,
IRQF_ONESHOT | IRQF_TRIGGER_RISING,
"Elect Remove", mbhc);
if (ret)
- goto err;
+ goto err_free_hs_ins_intr;

disable_irq_nosync(mbhc->intr_ids->mbhc_hs_rem_intr);

- ret = devm_request_threaded_irq(dev, mbhc->intr_ids->hph_left_ocp, NULL,
+ ret = request_threaded_irq(mbhc->intr_ids->hph_left_ocp, NULL,
wcd_mbhc_hphl_ocp_irq,
IRQF_ONESHOT | IRQF_TRIGGER_RISING,
"HPH_L OCP detect", mbhc);
if (ret)
- goto err;
+ goto err_free_hs_rem_intr;

- ret = devm_request_threaded_irq(dev, mbhc->intr_ids->hph_right_ocp, NULL,
+ ret = request_threaded_irq(mbhc->intr_ids->hph_right_ocp, NULL,
wcd_mbhc_hphr_ocp_irq,
IRQF_ONESHOT | IRQF_TRIGGER_RISING,
"HPH_R OCP detect", mbhc);
if (ret)
- goto err;
+ goto err_free_hph_left_ocp;

return mbhc;
-err:
+
+err_free_hph_left_ocp:
+ free_irq(mbhc->intr_ids->hph_left_ocp, mbhc);
+err_free_hs_rem_intr:
+ free_irq(mbhc->intr_ids->mbhc_hs_rem_intr, mbhc);
+err_free_hs_ins_intr:
+ free_irq(mbhc->intr_ids->mbhc_hs_ins_intr, mbhc);
+err_free_btn_release_intr:
+ free_irq(mbhc->intr_ids->mbhc_btn_release_intr, mbhc);
+err_free_btn_press_intr:
+ free_irq(mbhc->intr_ids->mbhc_btn_press_intr, mbhc);
+err_free_sw_intr:
+ free_irq(mbhc->intr_ids->mbhc_sw_intr, mbhc);
+err_free_mbhc:
+ kfree(mbhc);
+
dev_err(dev, "Failed to request mbhc interrupts %d\n", ret);

return ERR_PTR(ret);
@@ -1537,9 +1552,19 @@ EXPORT_SYMBOL(wcd_mbhc_init);

void wcd_mbhc_deinit(struct wcd_mbhc *mbhc)
{
+ free_irq(mbhc->intr_ids->hph_right_ocp, mbhc);
+ free_irq(mbhc->intr_ids->hph_left_ocp, mbhc);
+ free_irq(mbhc->intr_ids->mbhc_hs_rem_intr, mbhc);
+ free_irq(mbhc->intr_ids->mbhc_hs_ins_intr, mbhc);
+ free_irq(mbhc->intr_ids->mbhc_btn_release_intr, 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);
mutex_unlock(&mbhc->lock);
+
+ kfree(mbhc);
}
EXPORT_SYMBOL(wcd_mbhc_deinit);

--
2.39.3