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 CAC4E2500DA; Tue, 3 Dec 2024 15:30:23 +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=1733239823; cv=none; b=tfetf7ULxSx+ud/D60GW/3BOc5ueQ6R7J18DNZrk5xgar2Fvuh4bVUj/A0OKAwp1KoEIiLWfGrPczTLYLBP3nv0TdiSeIYgVOAm+fotNAb5lMGq2qxGzBXv+z+YhEBq8J7A6EneYBlla86YvPZ5Cvrrm9dIzRezx8ZsHieBpp6g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733239823; c=relaxed/simple; bh=lyD7nUhXyWrb6oJ+uYj1EmfqTRfaL9l0BL0X330xgRc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=WSMgja6iDM7qdqWSbfw7KSeYJNDIzJ6MNXzOdoaLYOuBKLpnzUX2avreQOiKl7d6H5CFefD34voiXA3BwIrGtWtXKo6XITqh5jltxBEJ0KMhJfEUEM8/orGZbMDysMUGIeHLWlkU5x3w03SLfiTxZ8MzOhBRz5PMHolahouR4FE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=V22cThNl; 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="V22cThNl" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 518CCC4CECF; Tue, 3 Dec 2024 15:30:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1733239823; bh=lyD7nUhXyWrb6oJ+uYj1EmfqTRfaL9l0BL0X330xgRc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=V22cThNlOrjFWAFyWv9J01cZbSi5TCkWlOaleSwxV7GkUYXD/4HUcseqH5AxYY2vR TX/HGLlPCtN7BgMLG7XrgewOtzFPrLpa5YzYLiq9x8baUq3I0tqOogO+ID8NeEyScJ dwy+SKhvKdppkdnOEkVxyV5bxvsf5dr7BfWQ3t8Q= 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 6.11 715/817] serial: 8250: omap: Move pm_runtime_get_sync Date: Tue, 3 Dec 2024 15:44:47 +0100 Message-ID: <20241203144023.901991712@linuxfoundation.org> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20241203143955.605130076@linuxfoundation.org> References: <20241203143955.605130076@linuxfoundation.org> User-Agent: quilt/0.67 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 6.11-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 @@ -777,12 +777,12 @@ 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); if (priv->habit & UART_HAS_EFR2) serial_out(up, UART_OMAP_EFR2, 0x0);