From patchwork Tue Jan 7 16:29:28 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Russell King (Oracle)" X-Patchwork-Id: 13929330 X-Patchwork-Delegate: kuba@kernel.org 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 CCAA11F7575 for ; Tue, 7 Jan 2025 16:29:39 +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=1736267382; cv=none; b=q9PlEmCzKtnGZV5BwNj89263ZuBNw4j9LBJxFr/TGORejXfmYfPW6RmqcuGhYaqSDG756UlVVC1o51oq+H0bBHShr8XdgvgaQ0g7uc7BPWgUjYSPqLhvUZYqv+XNMzNHVAhwkHSaNYy+5KxXp4kQze9JqiP52vJUbQvjGoZTYtA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736267382; c=relaxed/simple; bh=MbbElpiISCmXlQ+d02zeQiaXWQGdSHJu5HKs9PxwHAA=; h=In-Reply-To:References:From:To:Cc:Subject:MIME-Version: Content-Disposition:Content-Type:Message-Id:Date; b=Qa+rcbBZtyU1Htk9GXP3mPO9/SNbYCR15qH81RtquIfx4GqxsDBCjdoaCuJD6ILc9HqP9+w9qcjQkcm51tTtbJsDopJ0+zI0blE3ZoAkj9OFan2q7fcZZ+m7KlDrL2oPgXVH4uv9/M9Bis2cGUW2On2Xdxh1x70zimeHmPrqXPw= 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=acBQQ+Ny; 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="acBQQ+Ny" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Date:Sender:Message-Id:Content-Type: Content-Transfer-Encoding:MIME-Version:Subject:Cc:To:From:References: In-Reply-To:Reply-To: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=AtobVMnr8E5gzN8ZgvrreHjtEy+CmRHbLYgzCHnDnG4=; b=acBQQ+NyHAqjSuSoJzPyYnAk3v 4n+lmW/UgxASD7sLSNkoXl5EANM5UHgfIZ/2530W9UaVyNDKtpYYbDCkxV2OVfGEeWVSe9r0l8mbn 5ZVzo81Fpfevfrf0VG4JbcCmBWhk/YkVAURV0xkGoptuC+98Q109QMk8r45FwwjMqsmmxhGFvUuz8 gbNErKg2ETG1MohLqC8fz768v1Z0iVblTlZTB9qdOiPsq1x+8IPPGVHOjM6/igTRZ8F28hdbLDWnb O/KsaNI9PGcG54RwEjKOpNZ7drgrjzvuY4Pe86QZiQLUk7yHj+Y8kKc5XL9D7e8M9d/x6zreSBCIF U3+faP8w==; Received: from e0022681537dd.dyn.armlinux.org.uk ([fd8f:7570:feb6:1:222:68ff:fe15:37dd]:59402 helo=rmk-PC.armlinux.org.uk) by pandora.armlinux.org.uk with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1tVCSR-0007nz-1X; Tue, 07 Jan 2025 16:29:31 +0000 Received: from rmk by rmk-PC.armlinux.org.uk with local (Exim 4.94.2) (envelope-from ) id 1tVCSO-007Y43-Fa; Tue, 07 Jan 2025 16:29:28 +0000 In-Reply-To: References: From: "Russell King (Oracle)" To: Andrew Lunn , Heiner Kallweit Cc: Alexandre Torgue , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Jose Abreu , linux-arm-kernel@lists.infradead.org, linux-stm32@st-md-mailman.stormreply.com, Maxime Coquelin , netdev@vger.kernel.org, Paolo Abeni Subject: [PATCH net-next v3 12/18] net: stmmac: move priv->eee_enabled into stmmac_eee_init() Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Disposition: inline Message-Id: Sender: Russell King Date: Tue, 07 Jan 2025 16:29:28 +0000 X-Patchwork-Delegate: kuba@kernel.org All call sites for stmmac_eee_init() assign the return code to priv->eee_enabled. Rather than having this coded at each call site, move the assignment inside stmmac_eee_init(). Since stmmac_init_eee() takes priv->lock before checking the state of priv->eee_enabled, move the assignment within the locked region. Also, stmmac_suspend() checks the state of this member under the lock. While two concurrent calls to stmmac_init_eee() aren't possible, there is a possibility that stmmac_suspend() may run concurrently with a change of priv->eee_enabled unless we modify it under the lock. Reviewed-by: Andrew Lunn Signed-off-by: Russell King (Oracle) --- .../net/ethernet/stmicro/stmmac/stmmac_main.c | 18 +++++++++++------- 1 file changed, 11 insertions(+), 7 deletions(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index 94bb6b07f96f..b7e0026c271b 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -462,11 +462,13 @@ static void stmmac_eee_ctrl_timer(struct timer_list *t) * can also manage EEE, this function enable the LPI state and start related * timer. */ -static bool stmmac_eee_init(struct stmmac_priv *priv) +static void stmmac_eee_init(struct stmmac_priv *priv) { /* Check if MAC core supports the EEE feature. */ - if (!priv->dma_cap.eee) - return false; + if (!priv->dma_cap.eee) { + priv->eee_enabled = false; + return; + } mutex_lock(&priv->lock); @@ -483,8 +485,9 @@ static bool stmmac_eee_init(struct stmmac_priv *priv) priv->plat->mult_fact_100ns, false); } + priv->eee_enabled = false; mutex_unlock(&priv->lock); - return false; + return; } if (priv->eee_active && !priv->eee_enabled) { @@ -507,9 +510,10 @@ static bool stmmac_eee_init(struct stmmac_priv *priv) STMMAC_LPI_T(priv->tx_lpi_timer)); } + priv->eee_enabled = true; + mutex_unlock(&priv->lock); netdev_dbg(priv->dev, "Energy-Efficient Ethernet initialized\n"); - return true; } /* stmmac_get_tx_hwtstamp - get HW TX timestamps @@ -967,7 +971,7 @@ static void stmmac_mac_link_down(struct phylink_config *config, stmmac_mac_set(priv, priv->ioaddr, false); priv->eee_active = false; - priv->eee_enabled = stmmac_eee_init(priv); + stmmac_eee_init(priv); stmmac_set_eee_pls(priv, priv->hw, false); if (stmmac_fpe_supported(priv)) @@ -1080,7 +1084,7 @@ static void stmmac_mac_link_up(struct phylink_config *config, STMMAC_FLAG_RX_CLK_RUNS_IN_LPI)); priv->tx_lpi_timer = phy->eee_cfg.tx_lpi_timer; priv->eee_active = phy->enable_tx_lpi; - priv->eee_enabled = stmmac_eee_init(priv); + stmmac_eee_init(priv); stmmac_set_eee_pls(priv, priv->hw, true); }