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 0B2A817BB16; Tue, 3 Dec 2024 14:39:41 +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=1733236781; cv=none; b=MlmoaknqilGmrwsW3X4F/PlhaFvRPeSHjSvbbhdARHuX7+I5HB/eWyskYk+gySrVwlel3fnrwsKHfwNXvyNsiGodLgY/xXFrlL2lZzz5wkXOtdjf92RzpI/NpLtVlmFQks+Fi+fgw/wJ+yiUBJybHqUWMU2JgrNIGNxAjPhKE3M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733236781; c=relaxed/simple; bh=JlY4hdPL1598l86pqdsXG5cy+AzOU/zpQuIVse5xEqk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=LNjFHGpeBTozuUIIrxxR2m5WknXIWIL+Jcis15SuSwzIOJG3Z0eMnx/ch9axnHiY5SmLbK8xLeqbTJNJpg4KQiTwyjTFECGZRKjuwyMatSrNv4mHiTkd/eXKRa57gOQE7qeWT47P166R0bbUYA/+e0GKODm3T0iqqzsmFps+8hU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=2ZfOtzFX; 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="2ZfOtzFX" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6E278C4CED6; Tue, 3 Dec 2024 14:39:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1733236780; bh=JlY4hdPL1598l86pqdsXG5cy+AzOU/zpQuIVse5xEqk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=2ZfOtzFXfs1sRSs7jKtlgXAuD90te0MXCp7fdAaQF81gle2qzlL+f1wu4ClAzfnAV 0Q+eApSZyJY66YyniwdXkdDEwnLpdi7g4gkl2LsWoBZ9WNxaWiQCi2XTvSH1ssE/cU 0r/XPZzkAditErITBfL86rYZ/DcyeUrlULS1G0e4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Bin Liu , Judith Mendez , Kevin Hilman Subject: [PATCH 4.19 116/138] serial: 8250: omap: Move pm_runtime_get_sync Date: Tue, 3 Dec 2024 15:32:25 +0100 Message-ID: <20241203141928.003368392@linuxfoundation.org> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20241203141923.524658091@linuxfoundation.org> References: <20241203141923.524658091@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 4.19-stable review patch. If anyone has any objections, please let me know. ------------------ From: Bin Liu commit bcc7ba668818dcadd2f1db66b39ed860a63ecf97 upstream. 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. cc: stable@vger.kernel.org Fixes: 0e31c8d173ab ("tty: serial: 8250_omap: add custom DMA-RX callback") Signed-off-by: Bin Liu [Judith: Add commit message] Signed-off-by: Judith Mendez Reviewed-by: Kevin Hilman Tested-by: Kevin Hilman Link: https://lore.kernel.org/r/20241031172315.453750-1-jm@ti.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250_omap.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/tty/serial/8250/8250_omap.c +++ b/drivers/tty/serial/8250/8250_omap.c @@ -643,12 +643,12 @@ static void omap_8250_shutdown(struct ua 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); up->ier = 0;