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h=X-UI-Sender-Class:To:Cc:From:Subject:Date; b=nOFABXuSEyJfQ+HzeMlkSDSfMFh4dxpNxJx3/66SkKUGGsT+1M95NbI3Mmh5oIBJp IWIlZyMr5pEQiy9NlofxuuN1LjkTVPhWqe1sCdAGBpcWw1r9K+lCL6s3S0xH6WVBOK Wbh9q2JUKhSr0EN9QsEg5wPbpj8iFeEQA7rU233o= X-UI-Sender-Class: c548c8c5-30a9-4db5-a2e7-cb6cb037b8f9 Received: from [192.168.1.2] ([2.244.93.244]) by smtp.web.de (mrweb005 [213.165.67.108]) with ESMTPSA (Nemesis) id 1MnX5F-1ilNQa27RF-00jcf8; Sat, 02 May 2020 18:48:17 +0200 To: linux-clk@vger.kernel.org, Michael Turquette , Santosh Shilimkar , Stephen Boyd Cc: LKML , kernel-janitors@vger.kernel.org From: Markus Elfring Subject: clk: keystone: Clarification for a return value check in _of_pll_clk_init() Autocrypt: addr=Markus.Elfring@web.de; prefer-encrypt=mutual; keydata= mQINBFg2+xABEADBJW2hoUoFXVFWTeKbqqif8VjszdMkriilx90WB5c0ddWQX14h6w5bT/A8 +v43YoGpDNyhgA0w9CEhuwfZrE91GocMtjLO67TAc2i2nxMc/FJRDI0OemO4VJ9RwID6ltwt mpVJgXGKkNJ1ey+QOXouzlErVvE2fRh+KXXN1Q7fSmTJlAW9XJYHS3BDHb0uRpymRSX3O+E2 lA87C7R8qAigPDZi6Z7UmwIA83ZMKXQ5stA0lhPyYgQcM7fh7V4ZYhnR0I5/qkUoxKpqaYLp YHBczVP+Zx/zHOM0KQphOMbU7X3c1pmMruoe6ti9uZzqZSLsF+NKXFEPBS665tQr66HJvZvY GMDlntZFAZ6xQvCC1r3MGoxEC1tuEa24vPCC9RZ9wk2sY5Csbva0WwYv3WKRZZBv8eIhGMxs rcpeGShRFyZ/0BYO53wZAPV1pEhGLLxd8eLN/nEWjJE0ejakPC1H/mt5F+yQBJAzz9JzbToU 5jKLu0SugNI18MspJut8AiA1M44CIWrNHXvWsQ+nnBKHDHHYZu7MoXlOmB32ndsfPthR3GSv jN7YD4Ad724H8fhRijmC1+RpuSce7w2JLj5cYj4MlccmNb8YUxsE8brY2WkXQYS8Ivse39MX BE66MQN0r5DQ6oqgoJ4gHIVBUv/ZwgcmUNS5gQkNCFA0dWXznQARAQABtCZNYXJrdXMgRWxm cmluZyA8TWFya3VzLkVsZnJpbmdAd2ViLmRlPokCVAQTAQgAPhYhBHDP0hzibeXjwQ/ITuU9 Figxg9azBQJYNvsQAhsjBQkJZgGABQsJCAcCBhUICQoLAgQWAgMBAh4BAheAAAoJEOU9Figx g9azcyMP/iVihZkZ4VyH3/wlV3nRiXvSreqg+pGPI3c8J6DjP9zvz7QHN35zWM++1yNek7Ar OVXwuKBo18ASlYzZPTFJZwQQdkZSV+atwIzG3US50ZZ4p7VyUuDuQQVVqFlaf6qZOkwHSnk+ CeGxlDz1POSHY17VbJG2CzPuqMfgBtqIU1dODFLpFq4oIAwEOG6fxRa59qbsTLXxyw+PzRaR LIjVOit28raM83Efk07JKow8URb4u1n7k9RGAcnsM5/WMLRbDYjWTx0lJ2WO9zYwPgRykhn2 sOyJVXk9xVESGTwEPbTtfHM+4x0n0gC6GzfTMvwvZ9G6xoM0S4/+lgbaaa9t5tT/PrsvJiob kfqDrPbmSwr2G5mHnSM9M7B+w8odjmQFOwAjfcxoVIHxC4Cl/GAAKsX3KNKTspCHR0Yag78w i8duH/eEd4tB8twcqCi3aCgWoIrhjNS0myusmuA89kAWFFW5z26qNCOefovCx8drdMXQfMYv g5lRk821ZCNBosfRUvcMXoY6lTwHLIDrEfkJQtjxfdTlWQdwr0mM5ye7vd83AManSQwutgpI q+wE8CNY2VN9xAlE7OhcmWXlnAw3MJLW863SXdGlnkA3N+U4BoKQSIToGuXARQ14IMNvfeKX NphLPpUUnUNdfxAHu/S3tPTc/E/oePbHo794dnEm57LuuQINBFg2+xABEADZg/T+4o5qj4cw nd0G5pFy7ACxk28mSrLuva9tyzqPgRZ2bdPiwNXJUvBg1es2u81urekeUvGvnERB/TKekp25 4wU3I2lEhIXj5NVdLc6eU5czZQs4YEZbu1U5iqhhZmKhlLrhLlZv2whLOXRlLwi4jAzXIZAu 76mT813jbczl2dwxFxcT8XRzk9+dwzNTdOg75683uinMgskiiul+dzd6sumdOhRZR7YBT+xC wzfykOgBKnzfFscMwKR0iuHNB+VdEnZw80XGZi4N1ku81DHxmo2HG3icg7CwO1ih2jx8ik0r riIyMhJrTXgR1hF6kQnX7p2mXe6K0s8tQFK0ZZmYpZuGYYsV05OvU8yqrRVL/GYvy4Xgplm3 DuMuC7/A9/BfmxZVEPAS1gW6QQ8vSO4zf60zREKoSNYeiv+tURM2KOEj8tCMZN3k3sNASfoG fMvTvOjT0yzMbJsI1jwLwy5uA2JVdSLoWzBD8awZ2X/eCU9YDZeGuWmxzIHvkuMj8FfX8cK/ 2m437UA877eqmcgiEy/3B7XeHUipOL83gjfq4ETzVmxVswkVvZvR6j2blQVr+MhCZPq83Ota xNB7QptPxJuNRZ49gtT6uQkyGI+2daXqkj/Mot5tKxNKtM1Vbr/3b+AEMA7qLz7QjhgGJcie qp4b0gELjY1Oe9dBAXMiDwARAQABiQI8BBgBCAAmFiEEcM/SHOJt5ePBD8hO5T0WKDGD1rMF Alg2+xACGwwFCQlmAYAACgkQ5T0WKDGD1rOYSw/+P6fYSZjTJDAl9XNfXRjRRyJSfaw6N1pA Ahuu0MIa3djFRuFCrAHUaaFZf5V2iW5xhGnrhDwE1Ksf7tlstSne/G0a+Ef7vhUyeTn6U/0m +/BrsCsBUXhqeNuraGUtaleatQijXfuemUwgB+mE3B0SobE601XLo6MYIhPh8MG32MKO5kOY hB5jzyor7WoN3ETVNQoGgMzPVWIRElwpcXr+yGoTLAOpG7nkAUBBj9n9TPpSdt/npfok9ZfL /Q+ranrxb2Cy4tvOPxeVfR58XveX85ICrW9VHPVq9sJf/a24bMm6+qEg1V/G7u/AM3fM8U2m tdrTqOrfxklZ7beppGKzC1/WLrcr072vrdiN0icyOHQlfWmaPv0pUnW3AwtiMYngT96BevfA qlwaymjPTvH+cTXScnbydfOQW8220JQwykUe+sHRZfAF5TS2YCkQvsyf7vIpSqo/ttDk4+xc Z/wsLiWTgKlih2QYULvW61XU+mWsK8+ZlYUrRMpkauN4CJ5yTpvp+Orcz5KixHQmc5tbkLWf x0n1QFc1xxJhbzN+r9djSGGN/5IBDfUqSANC8cWzHpWaHmSuU3JSAMB/N+yQjIad2ztTckZY pwT6oxng29LzZspTYUEzMz3wK2jQHw+U66qBFk8whA7B2uAU1QdGyPgahLYSOa4XAEGb6wbI FEE= Message-ID: Date: Sat, 2 May 2020 18:48:16 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Language: en-GB Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:1bLnWoWMwoNjavQBlX0SyTNle5P9ix8u7LcAPnhwclEW9W3V7Up Qm5sHKhl4rN/xCflW81nOpbargyg5lexzMWueSmd7ztk1kbL7tA+zcTt4q5GI1kE5CfOSU0 M9xPqEIB9Yrtg0h5BATrF2FzyL7CsS25kycB3LUxth8TVyNrqnOYo9CUgozYLIi/QCeLXCQ IvUmp2xRRnn2hKsYBSGXQ== X-Spam-Flag: NO X-UI-Out-Filterresults: notjunk:1;V03:K0:C0x3Fw4bwP0=:MVSPYv4LeQmiBhmCBfapZh TwkLGXCvAwFqbndVQUs0Exqn6Uo903lAf2YkSYicEMw1LGBEbiLAD76geeiIpkx37sL735+MY 5cBnqQeqLhHVOGAqCRN0dScn/9+Y54PVTbgHWNDh+ZkV33k7qZp8z/WrWCVJTYuHY6vPjOjw0 XNhnOArg67vwL8L0YhyYrSIqT65TUvnj8k3vTEPIOhW5Q/TDUnbc3eAersGfRIFxTEqyEdre2 eelHpp3zEigHG7j1ZxR78uHtTUOvKY9lLdq0nF9ATyQXJ+3g3bv0uavuE9NgRlOpIdX6WaWiE Z6mZukblhmXq/mRAI2eoIGKKYIbGW1icnGwy7Hf9m/grw0IALghS6ZyZBsaCb2PjF84PMjcrL mdIdTloB6iu66f0bxZhQYgqBGwJNt4/n8h5WAnYAxBJOWWcwmMS3x2f+MvsCrCbNDGv6ErQzH DDHDPjrXpswE9z60C6KwYYu5yb7339WuKrN8hR+BvzylgHov+WHXvaGJqt9Vq+WZ8TT0nOaXN IISyyP5aDF/r4PO33zkUStyoib/3JTzUCcT3tikx54OhgBl66bqMktPYsbWf4AYPKXbiX+hW3 2hD7+mc83r4Or4CijehCYHuI3AgjwlsgSZqWo1BYavAd+3aFZp7HW+JtKCwNxh6iGOU1Shm3x 68FgXcnb3u3FPpf5oM07hCxx+9L0PNPZIK/KHym/phJMqsTLjx6lL7Aeew54aqg28volz3kXf UALx/3cq0ngPtAC0a4ebpzAX3VB0BgxibTi1CQDC3CPIIW+fTkLpq4ZX6WesGGGsT7L0Cz1iN MwCeCBMXO6CH/OfkcGetIN1dZHslqmg03AHBFmbyjR8YRKQC4mDmOpT3qxPUpWalwsAjhQJoo U8FMjBReTh3qbmPJi8/KAinQPS0SNgzBKLtz2LbQcXPaa6D3ERquBgqsUR1xQMBKqquGQ9l/Z T/JYJXZ71QBGBnrRnpvCmIp/ztL6QXRn9D0n/tbCmvVAEcfY1cwpiW9MCRNe4C7KWu0eYpRbb ctBUD89c/TunyL9DLUU8Q9vC4ujBFQppbl/PZSZ/eaC27K67OakvAh/BxjhSV4RpQVSNxl20u zjjb9PGIdpHTvSeug6jyWdEiUFF+FpjnqvWjK4M488Zgtjv+ZIYM6oFAlqU+iMrlDjupN0lxk d7acrlcZ0ylKe2I8VFphiakkD8NheAp7tjrliYXspcXofm6rxMrNh9RGPEmvbYkenRgagUxme ZI900XuSEQ8flHEVn Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, I have tried another small script out for the semantic patch language. This source code analysis approach points out that the function =E2=80=9Cc= lk_register_pll=E2=80=9D is called by the function =E2=80=9C_of_pll_clk_init=E2=80=9D. https://elixir.bootlin.com/linux/v5.7-rc3/source/drivers/clk/keystone/pll.= c#L153 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/dr= ivers/clk/keystone/pll.c?id=3D690e2aba7beb1ef06352803bea41a68a3c695015#n15= 3 A null pointer check is performed at this place. The function =E2=80=9Cclk_register_pll=E2=80=9D (from the same source file= ) can eventually return the pointer =E2=80=9CERR_PTR(-ENOMEM)=E2=80=9D. Is there a need to take this special case also into account? Regards, Markus