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Miller" , Esben Haabendal , Heiner Kallweit , Jakub Kicinski , Michal Simek , Wei Yongjun Subject: Re: [PATCH] net: xilinx: fix potential NULL dereference in temac_probe() From: Markus Elfring 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= To: Florian Fainelli , Xu Wang , linux-arm-kernel@lists.infradead.org, netdev@vger.kernel.org Message-ID: Date: Tue, 14 Jul 2020 11:42:32 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.9.0 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:vLi6h1xpjWMUCKcSNNNgX+icND2lD7ixmP/+xib65ObXwxp/pN6 Requoa3BsHECASb/PaU0viV5ZNyfdtqA7vVkT7filAT2oZ4d5mdvkjxMm9ma2pQRLCIXG3F z1dftJP+Y9PQp54GUwtsS1LPy+kT8IhprU810ByqExc2oOr/+bRcI1WmhG5chuBH2Kbvb1k oKp9G2RfG8ycPGEutGvPg== X-Spam-Flag: NO X-UI-Out-Filterresults: notjunk:1;V03:K0:SmFznmHh7L8=:RF9548JLrgaZgM/UjOeIvT SzqVtYGkgKAfr3jvou1iJnaEToaslpN2x+1bz+rEsUgnAig4gOzQ6OG5bhPaPaakAn7FJzm4m LrScKma38z+exxUH5z5YP/TNZPHs79YimS9aw4TOLKPAdn6EwpRE/DXXwAxX1tfb01cgQBjtB EEw3/OU0Y3vG/UcdazDX30c4fVpZaQ3cu0ErpeUSgiTrfdlJgwCHL5rh72F3B/MhCGWf7p1Yt h5+rTlFNfj887z3rAtDi3mqG9mcLTlpLn49DCC4SOP3go6KcBxBm40DO4SunP8lnG9ht5hMAB lbkwRyV8KoJWeNSMhzPJutWGFmMh1umzZhOtx8zCQI65PwJmLwmnxV8CYX3l7KQCu7A1gWfN5 lqWdtJMMah6WbMR7vH+krtQ3nxPQmQd4vbmQNNeRb16d+lvpRupffqCY80/KSU9uiUGXxxzIT meWteWZUm2IRskruFqgmwuWR6QC5N3dhTRH0G0y8pKXDlsnG2PeLzC2FaBagzonadLSUoGu8j DZirrtB4Cz9r0GSbqLO4H6GPBCQuwkVQQxlJOW26FbKPfC5j5lkfHAWN4Hh1FUq5HDi+yvoB4 JwLh5b9+x7HRw1ZADOJnMHX3pNmtf7O4qfCbGa/yuC/zJcKxdvIZypLWYuE/7fsKJgDQFUR09 4fa3KwinHJpplVv6IEPZiqSaCci5ree9BJMu09Tde/dNxB8jgiQpQF/LwcWPPoXKa4liO2sHO b8BIGwyba8uWUh4sYLuW8VZ5nTl79VGvu5jcxCaN1Dz6Ww7b4V1A6vREhOsReAOrFRNAq1aUn VXypJLMDLaI39cS3fcEDlX1LejeBawzGJHlie8KHXYlqyEFNvxYUP9Xjt65bNFiZjdufKFiAd PwIJbZoKhs3VDQcE5oFgu7YWYV4gioA5ShaTMptCJZ36WXcp3nwSG3BkuoN9vFSLvxzosaOn4 qdmwxeY6pjf1owmiY+f7v7C9LjVqdfrggpc7EXVSRN4DCeKhUd2yIw4vdL57WtwcDmi6PZzNe UYf08WxUD2OYRiPw8T2XZu3s3OF9E/yO5Fkk2MYQi0h/eJvEbk/1vDfNa4oVUghrNL1fAcfkB +IIsKxPrCjOiCLinoCzTImhp5o4Ifzk05Ll5XGFqH9VOnxN2HwSytA3sz7RsnBWWrCPTq4Tp0 bRreulSgz15l1aaLwGNw/DKQ+gkTj2KPm/GTunroSPzxde3ScVrqJzVUYp7EyAUet4D2o1+5D twfZKyOCk32jVMAr4RE7gn5IB5iTu9Ji4PwsYdQ== Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > If you use devm_ioremap_resource() you can remove the !res check > entirely which would be equally acceptable as a fix. Would you like to use the wrapper function =E2=80=9Cdevm_platform_get_and_= ioremap_resource=E2=80=9D then? https://elixir.bootlin.com/linux/v5.8-rc4/source/drivers/base/platform.c#L= 66 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/dr= ivers/base/platform.c?id=3D0dc589da873b58b70f4caf4b070fb0cf70fdd1dc#n66 Regards, Markus