From patchwork Mon Jan 9 15:30:44 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Walle X-Patchwork-Id: 13093753 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7AAEDC61DB3 for ; Mon, 9 Jan 2023 15:32:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To:References:Message-Id :MIME-Version:Subject:Date:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=F0uu+NgsREDAsSyj7MDMx9sKJo/dxumHR4bmitQGZPQ=; b=J1k26atngkiV5z hBJMtD3xxGw/199mbybn+DlaXF5XjVfH4IyxnZ5xYVQ+nzO4glgPIUS52l+bu+7hqQ7YmOP7jCgzt tZJnaHTbAhVypOS3+yHceJAJOXZPRu2mXNNOhxbnpDND0zFvFH4Jtng2n4dJyfKNos+8hPrLK6HqI Els9OzYh/P6+VaG/XhCd6J5wexs43Ti/4gswDc9CD3whdwKsDdD3E84UIH/bq+/ENGeApM5d0GDKn pzgv1UU96/96KXBYu0nc7xrXwX4B3Fo8rKg14pqJJZyJsDzU734ZWRFzCAln39WEaa8X3FMgy8/JX wGVZRV4QigU7w3JeSrVQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pEu7B-002G1B-GR; Mon, 09 Jan 2023 15:31:09 +0000 Received: from 0001.3ffe.de ([2a01:4f8:c0c:9d57::1] helo=mail.3ffe.de) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1pEu6z-002Fth-LA; Mon, 09 Jan 2023 15:30:59 +0000 Received: from mwalle01.sab.local (unknown [213.135.10.150]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mail.3ffe.de (Postfix) with ESMTPSA id 0282E1654; Mon, 9 Jan 2023 16:30:55 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=walle.cc; s=mail2022082101; t=1673278255; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=cwldWyFf7CaFTxQBOBymigKCBxPFmfPQFSYXECFA1MQ=; b=oBe/wDiEGzYu9Fc30RDGqfOtePnx+5N67Jc8XWAwViJATJbP5JciHihYt08LZ2CPnqoGXm uZArpFXb8LGFjfjAjXXX7S79M2PS+79KJbqSZO69qsWKd3bzRrrLYAYIXYg6ql+KNj6eYf QFLV/7qysP76I17N9ZXUkpM8Co/fADHz8zTv8pRK0+sadsWUa23hOO8F8/TFqbhkDxEDNV Kh4IJzK9xvXaw84ecISSaMUBh90vtEkIuwjqMygFfeNX7aQTRJKU3bGSi62Qh3a0YIRJXQ PD2iEEB36IH2lBcrduXuSgnBMlXDpiUEHLj2BemVjPRj+aiM8jY7HGIZ/J1pvg== From: Michael Walle Date: Mon, 09 Jan 2023 16:30:44 +0100 Subject: [PATCH net-next v3 04/11] net: mdio: C22 is now optional, EOPNOTSUPP if not provided MIME-Version: 1.0 Message-Id: <20221227-v6-2-rc1-c45-seperation-v3-4-ade1deb438da@walle.cc> References: <20221227-v6-2-rc1-c45-seperation-v3-0-ade1deb438da@walle.cc> In-Reply-To: <20221227-v6-2-rc1-c45-seperation-v3-0-ade1deb438da@walle.cc> To: Heiner Kallweit , Russell King , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Jose Abreu , Sergey Shtylyov , Wei Fang , Shenwei Wang , Clark Wang , NXP Linux Team , Sean Wang , Landen Chao , DENG Qingfang , Florian Fainelli , Vladimir Oltean , Matthias Brugger Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, Andrew Lunn , Geert Uytterhoeven , Michael Walle , Vladimir Oltean X-Mailer: b4 0.11.1 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230109_073057_941364_D564E4FC X-CRM114-Status: GOOD ( 11.24 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Andrew Lunn When performing a C22 operation, check that the bus driver actually provides the methods, and return -EOPNOTSUPP if not. C45 only busses do exist, and in future their C22 methods will be NULL. Signed-off-by: Andrew Lunn Signed-off-by: Michael Walle --- drivers/net/phy/mdio_bus.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c index c992a9fd8b01..f71ba6ab85a7 100644 --- a/drivers/net/phy/mdio_bus.c +++ b/drivers/net/phy/mdio_bus.c @@ -766,7 +766,10 @@ int __mdiobus_read(struct mii_bus *bus, int addr, u32 regnum) lockdep_assert_held_once(&bus->mdio_lock); - retval = bus->read(bus, addr, regnum); + if (bus->read) + retval = bus->read(bus, addr, regnum); + else + retval = -EOPNOTSUPP; trace_mdio_access(bus, 1, addr, regnum, retval, retval); mdiobus_stats_acct(&bus->stats[addr], true, retval); @@ -792,7 +795,10 @@ int __mdiobus_write(struct mii_bus *bus, int addr, u32 regnum, u16 val) lockdep_assert_held_once(&bus->mdio_lock); - err = bus->write(bus, addr, regnum, val); + if (bus->write) + err = bus->write(bus, addr, regnum, val); + else + err = -EOPNOTSUPP; trace_mdio_access(bus, 0, addr, regnum, val, err); mdiobus_stats_acct(&bus->stats[addr], false, err);