From patchwork Thu Oct 10 18:48:02 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Judith Mendez X-Patchwork-Id: 835362 Received: from lelv0143.ext.ti.com (lelv0143.ext.ti.com [198.47.23.248]) (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 F3AE61CCEF0; Thu, 10 Oct 2024 18:48:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.47.23.248 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728586099; cv=none; b=WRFketTX9B5QqfQljbul5MoKJq9ATCoIRG/afX8ELIXQUpPI5xMJxnO/JxNqJpQtt0dCQbvQpJ5Yx+WSJrXhsLecKshYgFQNgF7uQxV0knVHUsXtlMpy5flSSsZpkbisPHH8Ax8tBf5fy2dMybi0eu3EnpPukLyc+lXZa7K0SYs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728586099; c=relaxed/simple; bh=PQJkDvEyk3UIfsKwpvyY3mLyiKWfKdTOLxySV12GXAA=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=Rxx+sR5MvToAwLKGRR0o2tYVH2N3AZC0PIXyGej5x5Wf3Vi7r8hM3Cq0tsrwJSUsF33Z1lOq3XkdMyILeybd76ne9GvMTvQH0vWlxfLD1d3KjER1WmNSvNHMuE9RXXw+sbh7RWxtpYtH+5Vlc0dajSJPE8B5EFvoep/x+rQRGTU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=ti.com; spf=pass smtp.mailfrom=ti.com; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b=KrwFmaU3; arc=none smtp.client-ip=198.47.23.248 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=ti.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ti.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="KrwFmaU3" Received: from fllv0035.itg.ti.com ([10.64.41.0]) by lelv0143.ext.ti.com (8.15.2/8.15.2) with ESMTP id 49AIm6HT127830; Thu, 10 Oct 2024 13:48:06 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1728586086; bh=1oTPBF+SUaJaGZnyWmHn1NEj1otLNrz6Cnmjj8FEe5s=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=KrwFmaU33OAvMoM65SdPjTIQr2STEQGegSm2qJ7bWElyUgYtMvnC511P9urEWgarX N3aHkrc98mR6WvYkbpMApcuchpKusx0X4QXh6BQg5c2mWLehzsxXdattcuOvRDPj4V uXQ/MGDbCc2P+SxMsWKRV9JIf1O8qb1kHqnaKwPA= Received: from DFLE101.ent.ti.com (dfle101.ent.ti.com [10.64.6.22]) by fllv0035.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 49AIm6oB034468 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 10 Oct 2024 13:48:06 -0500 Received: from DFLE110.ent.ti.com (10.64.6.31) by DFLE101.ent.ti.com (10.64.6.22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.23; Thu, 10 Oct 2024 13:48:06 -0500 Received: from lelvsmtp5.itg.ti.com (10.180.75.250) by DFLE110.ent.ti.com (10.64.6.31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.23 via Frontend Transport; Thu, 10 Oct 2024 13:48:06 -0500 Received: from judy-hp.dhcp.ti.com (judy-hp.dhcp.ti.com [128.247.81.105]) by lelvsmtp5.itg.ti.com (8.15.2/8.15.2) with ESMTP id 49AIm3VA011182; Thu, 10 Oct 2024 13:48:06 -0500 From: Judith Mendez To: Grygorii Strashko , Santosh Shilimkar , Kevin Hilman , Linus Walleij , Bartosz Golaszewski CC: , , , , Judith Mendez , Bin Liu Subject: [PATCH 2/2] serial: 8250: omap: Move pm_runtime_get_sync Date: Thu, 10 Oct 2024 13:48:02 -0500 Message-ID: <20241010184802.203441-3-jm@ti.com> X-Mailer: git-send-email 2.46.2 In-Reply-To: <20241010184802.203441-1-jm@ti.com> References: <20241010184802.203441-1-jm@ti.com> Precedence: bulk X-Mailing-List: linux-serial@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-C2ProcessedOrg: 333ef613-75bf-4e12-a4b1-8e3623f5dcea Currently in omap_8250_shutdown, the dma->rx_running flag is set to zero in omap_8250_rx_dma_flush. Next pm_runtime_get_sync is called, which is a runtime resume call stack which can re-set the flag. When the call omap_8250_shutdown returns, the flag is expected to be UN-SET, but this is not the case. This is causing issues the next time UART is re-opened and omap_8250_rx_dma is called. Fix by moving pm_runtime_get_sync before the omap_8250_rx_dma_flush. Fixes: 0e31c8d173ab ("tty: serial: 8250_omap: add custom DMA-RX callback") Signed-off-by: Bin Liu Signed-off-by: Judith Mendez --- drivers/tty/serial/8250/8250_omap.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/tty/serial/8250/8250_omap.c b/drivers/tty/serial/8250/8250_omap.c index 88b58f44e4e9..0dd68bdbfbcf 100644 --- a/drivers/tty/serial/8250/8250_omap.c +++ b/drivers/tty/serial/8250/8250_omap.c @@ -776,12 +776,12 @@ static void omap_8250_shutdown(struct uart_port *port) struct uart_8250_port *up = up_to_u8250p(port); struct omap8250_priv *priv = port->private_data; + pm_runtime_get_sync(port->dev); + flush_work(&priv->qos_work); if (up->dma) omap_8250_rx_dma_flush(up); - pm_runtime_get_sync(port->dev); - serial_out(up, UART_OMAP_WER, 0); if (priv->habit & UART_HAS_EFR2) serial_out(up, UART_OMAP_EFR2, 0x0);