From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pandora.armlinux.org.uk (pandora.armlinux.org.uk [78.32.30.218]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 173E132ABCF for ; Tue, 27 Jan 2026 11:10:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=78.32.30.218 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769512211; cv=none; b=nMQsaLIBielAgNJNFCSWJD/lT5aNPyM3WVz6bVKzp2KHMstL+g/G+h9fqu5E3i8d1bb1LowOsT58VVMRDq1yeboV+I+dyvH4stdA0WjUlq45f48nyxJi8lwfoS0UcDjRf7Fe2N/ATrWfbatwaVPlA8p+TQeEkLDX3YbLemqi4fk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769512211; c=relaxed/simple; bh=nHzpPrah+NxvNjAAOV5VJStKl3UycyMPaf5a7uMspwY=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=D1+xC4jvdU2cfV6IfGCeauxYAbemsItipafyfz0ezItZ9f8JseIF0VnZvGEvLTZ1H6TxtSMqxiVGgnJ2QmR/bjqVV4T8laQJipIyiNAzNJhwYsa0wPthmu4aFPL5FDP3F008xqybhLGyR2levoKN1Znetxv+Fml1/FxHby2Rq4A= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=armlinux.org.uk; spf=none smtp.mailfrom=armlinux.org.uk; dkim=pass (2048-bit key) header.d=armlinux.org.uk header.i=@armlinux.org.uk header.b=B7evQ+OD; arc=none smtp.client-ip=78.32.30.218 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=armlinux.org.uk Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=armlinux.org.uk Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=armlinux.org.uk header.i=@armlinux.org.uk header.b="B7evQ+OD" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Sender:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=C5kmyXmetHxPdh/WTT268j77oIgJM0XUtVp82QU84iQ=; b=B7evQ+ODdW2+aP46GJqcq6oiXA nmadI0zNatIr0NlH/4vZgZi9HrdbVb7+BswGQtdfEM1XFFn3cKR9koHBQ1RFmoi+i+cH0r+eQEAXb FqoWxcqvdS7jf61YZtl0nFhUFloIRf6fCpNdRv/cOQp77qDKDp5CFbxNmXDkGdz/MutbVhS4SepXK EMZyXrERK8+QTdh+STKGqZZOzYke+CcgrqBr0VOdKrAKbCjYnrMW5FEbfrTd7Dqe2kBQkAwm5LHBO DBH0fkvEGP5xUlDYg0Dh/7O/boi9g/rQqw+nmv1Lem/OcUqY9Qf/vIO7lsq4CF3B+YVnzPRuQ8cc2 S44uKfAQ==; Received: from shell.armlinux.org.uk ([fd8f:7570:feb6:1:5054:ff:fe00:4ec]:46790) by pandora.armlinux.org.uk with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.98.2) (envelope-from ) id 1vkgxO-0000000061k-14b8; Tue, 27 Jan 2026 11:10:02 +0000 Received: from linux by shell.armlinux.org.uk with local (Exim 4.98.2) (envelope-from ) id 1vkgxK-000000005rw-19Ps; Tue, 27 Jan 2026 11:09:58 +0000 Date: Tue, 27 Jan 2026 11:09:58 +0000 From: "Russell King (Oracle)" To: Jakub Kicinski Cc: linux-stm32@st-md-mailman.stormreply.com, andrew+netdev@lunn.ch, linux-arm-kernel@lists.infradead.org, netdev@vger.kernel.org, pabeni@redhat.com, linux-rockchip@lists.infradead.org, heiko@sntech.de, alexandre.torgue@foss.st.com, andrew@lunn.ch, davem@davemloft.net, edumazet@google.com Subject: Re: [net-next,v2,06/22] net: stmmac: rk: add SoC specific ->init() method Message-ID: References: <20260127004020.3785641-1-kuba@kernel.org> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: Russell King (Oracle) On Tue, Jan 27, 2026 at 12:51:45AM +0000, Russell King (Oracle) wrote: > On Mon, Jan 26, 2026 at 04:40:20PM -0800, Jakub Kicinski wrote: > > This is an AI-generated review of your patch. The human sending this > > email has considered the AI review valid, or at least plausible. > > > > For local reproduction steps see https://netdev-ai.bots.linux.dev/ai-local.html > > --- > > net: stmmac: rk: add SoC specific ->init() method > > > > This commit adds infrastructure for SoC-specific initialization by adding > > an init callback to rk_gmac_ops and calling it from rk_gmac_setup(). > > > > > diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c > > > index 7f8ffd1549bc..4117f6863ff0 100644 > > > --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c > > > +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c > > > > [ ... ] > > > > > @@ -1618,6 +1619,14 @@ static struct rk_priv_data *rk_gmac_setup(struct platform_device *pdev, > > > > > > bsp_priv->dev = dev; > > > > > > + if (ops->init) { > > > + ret = ops->init(bsp_priv); > > > + if (ret) { > > > + dev_err_probe(dev, ret, "failed to init BSP\n"); > > > + return ERR_PTR(ret); > > ^^^^^^^^^^^^^^^ > > > > If ops->init() fails here, does bsp_priv->phy_reset need to be released? > > > > Earlier in rk_gmac_setup(), at line 1610, the code calls: > > > > bsp_priv->phy_reset = of_reset_control_get(plat->phy_node, NULL); > > > > of_reset_control_get() is not a devm-managed function, so the reset control > > would need to be explicitly released with reset_control_put() on error paths. > > > > This new error return happens after phy_reset could have been acquired (when > > the device has an integrated PHY), but before the function successfully > > returns. If this path is taken, it appears the reset control would be leaked. > > > > Currently no SoC sets ops->init so this path cannot trigger, but when a > > future SoC implements this callback, the leak would occur on init failure > > for devices with integrated PHYs. > > However, the driver does not release this resource when cleaning up, so > that's already a bug as the driver currently stands. I think this could > be converted to devm_reset_control_get(), which would resolve both > leakages, but not sure. Note that fixing this is going to add yet another patch to the series, because this is a pre-existing bug in the driver. It can't be replaced with devm_reset_control_get(), because this driver is getting resources for a foreign device (we don't have the struct device pointer.) So, it isn't going to be a simple patch to fix this. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!