From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 3717A308F0B; Tue, 30 Sep 2025 15:14:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759245265; cv=none; b=AxJebvQcK0q0FqYu1GQNuwyLn5EKb8If6LzhAmmjk9VLQbNTrrzQt0Rf8FB5FPBFfQOh1u6vW3kJW8TqZb0R8GpZpGV+z+xs8fM64nuTqtfzyPBHJgPw1v/KmP1YJiW7cagyrtNq2SeVIS7gpRlfJMcSX2MXvLaUhVg11Op6aSk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759245265; c=relaxed/simple; bh=OHAzn37fHH/Q/yP53y6dQCdF2xmpw+1sxvsCEA8hthM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=PO5w5022vwbkjER/AUa/FLv6M/4AkuzJnGAQAzZRKYsNDEIzn+LQ+vkA0Rro+E8NRd8PxZSbCk5pkJW1mcL03QG1P2R/DCpq53MjIdoTJASD15k3XaUCAswTvIU8qP7lXkBYVNzbZNlex/OWgzOK2A/QQk3FfLcVbVZFacNGEno= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=j6oLFNAC; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="j6oLFNAC" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AE0E5C113D0; Tue, 30 Sep 2025 15:14:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1759245265; bh=OHAzn37fHH/Q/yP53y6dQCdF2xmpw+1sxvsCEA8hthM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=j6oLFNAC8e0sA9cJgzxdjB/nXXiZtgCGxG7scEVrfhu3EZZbSUXDA22N9eQr4RodP whYEVQww3IVcmZ1zAY/svdogJFgVqTvDpaWVfIyp1WNP5oHQRZSyGyQs+HTrhqwuXx jSLsvklnUZI82NtLzQtbnYp++jvczloql3wrdhl0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Geert Uytterhoeven , Marc Kleine-Budde , Sasha Levin Subject: [PATCH 5.15 115/151] can: rcar_can: rcar_can_resume(): fix s2ram with PSCI Date: Tue, 30 Sep 2025 16:47:25 +0200 Message-ID: <20250930143832.188564608@linuxfoundation.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20250930143827.587035735@linuxfoundation.org> References: <20250930143827.587035735@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Geert Uytterhoeven [ Upstream commit 5c793afa07da6d2d4595f6c73a2a543a471bb055 ] On R-Car Gen3 using PSCI, s2ram powers down the SoC. After resume, the CAN interface no longer works, until it is brought down and up again. Fix this by calling rcar_can_start() from the PM resume callback, to fully initialize the controller instead of just restarting it. Signed-off-by: Geert Uytterhoeven Link: https://patch.msgid.link/699b2f7fcb60b31b6f976a37f08ce99c5ffccb31.1755165227.git.geert+renesas@glider.be Signed-off-by: Marc Kleine-Budde Signed-off-by: Sasha Levin --- drivers/net/can/rcar/rcar_can.c | 8 +------- 1 file changed, 1 insertion(+), 7 deletions(-) diff --git a/drivers/net/can/rcar/rcar_can.c b/drivers/net/can/rcar/rcar_can.c index 68ad7da5c07e0..e21b73315b986 100644 --- a/drivers/net/can/rcar/rcar_can.c +++ b/drivers/net/can/rcar/rcar_can.c @@ -863,7 +863,6 @@ static int __maybe_unused rcar_can_resume(struct device *dev) { struct net_device *ndev = dev_get_drvdata(dev); struct rcar_can_priv *priv = netdev_priv(ndev); - u16 ctlr; int err; if (!netif_running(ndev)) @@ -875,12 +874,7 @@ static int __maybe_unused rcar_can_resume(struct device *dev) return err; } - ctlr = readw(&priv->regs->ctlr); - ctlr &= ~RCAR_CAN_CTLR_SLPM; - writew(ctlr, &priv->regs->ctlr); - ctlr &= ~RCAR_CAN_CTLR_CANM; - writew(ctlr, &priv->regs->ctlr); - priv->can.state = CAN_STATE_ERROR_ACTIVE; + rcar_can_start(ndev); netif_device_attach(ndev); netif_start_queue(ndev); -- 2.51.0