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Thu, 26 Mar 2026 02:30:23 -0700 (PDT) Message-ID: <0e89c8c2b5851211b2c1f2dc413e6775ab46364b.camel@gmail.com> Subject: Re: [PATCH v2 2/2] ASoC: adau1372: Fix clock leak on PLL lock failure From: Nuno =?ISO-8859-1?Q?S=E1?= To: Jihed Chaibi , lars@metafoo.de, nuno.sa@analog.com Cc: lgirdwood@gmail.com, broonie@kernel.org, perex@perex.cz, tiwai@suse.com, linux-sound@vger.kernel.org, linux-kernel@vger.kernel.org Date: Thu, 26 Mar 2026 09:31:10 +0000 In-Reply-To: <20260325210704.76847-3-jihed.chaibi.dev@gmail.com> References: <20260325210704.76847-1-jihed.chaibi.dev@gmail.com> <20260325210704.76847-3-jihed.chaibi.dev@gmail.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.58.3 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Wed, 2026-03-25 at 22:07 +0100, Jihed Chaibi wrote: > adau1372_enable_pll() was a void function that logged a dev_err() on > PLL lock timeout but did not propagate the error. As a result, > adau1372_set_power() would continue with adau1372->enabled set to true > despite the PLL being unlocked, and the mclk left enabled with no > corresponding disable on the error path. >=20 > Convert adau1372_enable_pll() to return int, using -ETIMEDOUT on lock > timeout and propagating regmap errors directly. In adau1372_set_power(), > check the return value and unwind in reverse order: restore regcache to > cache-only mode, reassert GPIO power-down, and disable the clock before > returning the error. >=20 > Signed-off-by: Jihed Chaibi > --- Also deserves a Fixes tag IMO. > Changes in v2: > - Also unwind regcache and GPIO power-down state on PLL lock failure, > =C2=A0 as noted by Mark Brown. >=20 > =C2=A0sound/soc/codecs/adau1372.c | 17 ++++++++++++++--- > =C2=A01 file changed, 14 insertions(+), 3 deletions(-) >=20 > diff --git a/sound/soc/codecs/adau1372.c b/sound/soc/codecs/adau1372.c > index 6345342218d6..e3eba241bdf7 100644 > --- a/sound/soc/codecs/adau1372.c > +++ b/sound/soc/codecs/adau1372.c > @@ -762,7 +762,7 @@ static int adau1372_startup(struct snd_pcm_substream = *substream, struct > snd_soc_ > =C2=A0 return 0; > =C2=A0} >=20 > -static void adau1372_enable_pll(struct adau1372 *adau1372) > +static int adau1372_enable_pll(struct adau1372 *adau1372) > =C2=A0{ > =C2=A0 unsigned int val, timeout =3D 0; > =C2=A0 int ret; > @@ -778,8 +778,12 @@ static void adau1372_enable_pll(struct adau1372 *ada= u1372) > =C2=A0 timeout++; > =C2=A0 } while (!(val & 1) && timeout < 3); >=20 > - if (ret < 0 || !(val & 1)) > + if (ret < 0 || !(val & 1)) { > =C2=A0 dev_err(adau1372->dev, "Failed to lock PLL\n"); > + return ret < 0 ? ret : -ETIMEDOUT; > + } > + > + return 0; > =C2=A0} >=20 > =C2=A0static int adau1372_set_power(struct adau1372 *adau1372, bool enabl= e) > @@ -807,7 +811,14 @@ static int adau1372_set_power(struct adau1372 *adau1= 372, bool enable) > =C2=A0 * accessed. > =C2=A0 */ > =C2=A0 if (adau1372->use_pll) { > - adau1372_enable_pll(adau1372); > + ret =3D adau1372_enable_pll(adau1372); > + if (ret) { > + regcache_cache_only(adau1372->regmap, true); > + if (adau1372->pd_gpio) > + gpiod_set_value(adau1372->pd_gpio, 1); > + clk_disable_unprepare(adau1372->mclk); > + return ret; > + } > =C2=A0 clk_ctrl |=3D ADAU1372_CLK_CTRL_CLKSRC; > =C2=A0 } >=20 > -- > 2.47.3