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dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="K9kefnNk" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 02E591F000FF; Thu, 17 Sep 2026 15:36:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789659390; bh=xTXW7uV7jJVL51Axx4zFbVYO+4vJeM7He4b78bXCOpY=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=K9kefnNka4+iVFRhfxCO+tL1ejBCr31qAIrlIX/Vs1mtSNyQ9dJVzRjrKu4jEQCy4 xQ/rJ1isqC/6kvniZ5fGefprgwumXEAUtHuIzsum5sXTbZ+c0bREUgfDB3NwMIlV8X QuzqKwID6qPF1eHg2KTgQPAEawKDfEVvP4wOsS/MAxH1IPVcenMAgkZ1/DuV/M+xxl o0G3FN7EvQ/tmlR2vEkHQfYEtO0idk2FCQX2LbfKcmLHjPVym6W80d9tbNDCoBsQzC Ump2ffHzUdO7pETS9oOo2c8mPGt5DLoozTgtvmDJOO6tNwpsXzCa5dUI+sqcxDsyKL K/uuR9WNjVe9A== From: sashiko-bot@kernel.org Subject: Re: [PATCH v19 2/5] phy: core: Add phy_get_by_of_node() Reply-To: sashiko-reviews@lists.linux.dev To: =?utf-8?b?QnJ5YW4gTydEb25vZ2h1ZQ==?= Cc: olteanv@gmail.com, linux-clk@vger.kernel.org, robh@kernel.org, conor+dt@kernel.org, devicetree@vger.kernel.org, linux-phy@lists.infradead.org, neil.armstrong@linaro.org, vkoul@kernel.org, media-ci@linuxtv.org In-Reply-To: <20260917-b4-linux-next-25-03-13-dtsi-x1e80100-camss-v19-2-21ad8a76e941@linaro.org> References: <20260917-b4-linux-next-25-03-13-dtsi-x1e80100-camss-v19-0-21ad8a76e941@linaro.org> <20260917-b4-linux-next-25-03-13-dtsi-x1e80100-camss-v19-2-21ad8a76e941@linaro.org> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Thu, 17 Sep 2026 15:36:29 +0000 Message-Id: <20260917153630.02E591F000FF@smtp.kernel.org> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Thank you for your contribution! Sashiko AI review found 2 potential issue(= s) to consider: - [High] phy: core: missing #phy-cells validation in phy_get_by_of_node() c= auses silent misbehavior - [Medium] phy: core: missing usb-nop-xceiv compatibility check in phy_get_= by_of_node() -- commit da2f62e45c36c5bbb5ae2340d33b32c34093c095 Author: Bryan O'Donoghue phy: core: Add phy_get_by_of_node() Add new function phy_get_by_of_node() allowing lookup of a phy by device_node. Separates existing logic in _of_phy_get() into an internal helper method _of_phy_get_with_args() to allow for reuse in new method. > diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c > index 89addd732bff3..4a8e1d3cdfe75 100644 > --- a/drivers/phy/phy-core.c > +++ b/drivers/phy/phy-core.c [ ... ] > @@ -1001,6 +1017,41 @@ struct phy *devm_of_phy_get_by_index(struct device= *dev, struct device_node *np, > } > EXPORT_SYMBOL_GPL(devm_of_phy_get_by_index); > =20 > +/** > + * phy_get_by_of_node() - lookup and obtain a reference to a phy by devi= ce_node > + * @np: node containing the phy > + * > + * Returns the phy associated with the device node or ERR_PTR. > + */ > +struct phy *phy_get_by_of_node(struct device_node *np) > +{ > + struct of_phandle_args args =3D { .np =3D np, .args_count =3D 0 }; [Severity: High] Does this hardcoded args_count =3D 0 bypass the #phy-cells validation that normally happens in of_parse_phandle_with_args()? If called on a PHY provider node with #phy-cells > 0 (e.g. resolved via an = OF graph endpoint), the provider's of_xlate callback will receive args_count = =3D 0. Since many callbacks don't check args_count and directly access args->args[= 0] (which is initialized to 0), could they silently return PHY 0 instead of returning an error, causing the caller to operate on the wrong PHY instance? > + struct phy *phy; > + > + if (!np) > + return ERR_PTR(-EINVAL); > + > + mutex_lock(&phy_provider_mutex); > + > + phy =3D _of_phy_get_with_args(&args); [Severity: Medium] Is this missing a compatibility check for "usb-nop-xceiv"? In _of_phy_get(), legacy USB PHYs are explicitly checked and return -ENODEV so they can gracefully fall back to the older usb-phy subsystem. Because phy_get_by_of_node() directly calls _of_phy_get_with_args() without this check, could a driver using this API on a legacy USB PHY node fail to find a generic PHY provider and receive -EPROBE_DEFER, causing an infinite probe deferral loop? > + > + if (IS_ERR(phy)) > + goto out_unlock; --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20260917-b4-linux-n= ext-25-03-13-dtsi-x1e80100-camss-v19-0-21ad8a76e941@linaro.org?part=3D2