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Mon, 20 Jul 2026 03:39:57 -0700 (PDT) From: Uday Khare To: lgirdwood@gmail.com, broonie@kernel.org Cc: perex@perex.cz, tiwai@suse.com, linux-sound@vger.kernel.org, linux-kernel@vger.kernel.org, Uday Khare Subject: [PATCH] ASoC: max98095: fix missing IS_ERR() before PTR_ERR() on mclk lookup Date: Mon, 20 Jul 2026 16:09:50 +0530 Message-ID: <20260720103950.14474-1-udaykhare77@gmail.com> X-Mailer: git-send-email 2.55.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" In max98095_probe(), the -EPROBE_DEFER check after devm_clk_get() is broken due to a missing IS_ERR() guard. The code intends to return -EPROBE_DEFER only when the clock lookup fails with that specific error. However, without IS_ERR() the check: if (PTR_ERR(max98095->mclk) =3D=3D -EPROBE_DEFER) is called unconditionally, including when devm_clk_get() succeeds and returns a valid pointer. Calling PTR_ERR() on a valid pointer reinterprets its address as a signed long; the result is arbitrary and is almost never equal to -EPROBE_DEFER, so the check silently does nothing in the success case. When devm_clk_get() fails with any error other than -EPROBE_DEFER the check is also skipped, leaving max98095->mclk holding an error pointer with no indication to the caller. This means a deferred probe will never actually be triggered for this device, and any non-EPROBE_DEFER clock error is silently swallowed with the error pointer left in the mclk field. Fix this by adding the missing IS_ERR() guard around the PTR_ERR() call, matching the pattern already used in the sibling max98088 and wm8960 drivers. Fixes: e3048c3d2be5 ("ASoC: max98095: Add master clock handling") Signed-off-by: Uday Khare --- sound/soc/codecs/max98095.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/sound/soc/codecs/max98095.c b/sound/soc/codecs/max98095.c index ced9bd4d94da..130b6694a634 100644 --- a/sound/soc/codecs/max98095.c +++ b/sound/soc/codecs/max98095.c @@ -1987,8 +1987,9 @@ static int max98095_probe(struct snd_soc_component *c= omponent) int ret =3D 0; =20 max98095->mclk =3D devm_clk_get(component->dev, "mclk"); - if (PTR_ERR(max98095->mclk) =3D=3D -EPROBE_DEFER) - return -EPROBE_DEFER; + if (IS_ERR(max98095->mclk)) + if (PTR_ERR(max98095->mclk) =3D=3D -EPROBE_DEFER) + return -EPROBE_DEFER; =20 /* reset the codec, the DSP core, and disable all interrupts */ max98095_reset(component); --=20 2.55.0