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 AA9DDBA48 for ; Tue, 7 Mar 2023 18:20:04 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0BA47C4339B; Tue, 7 Mar 2023 18:20:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1678213204; bh=0pE87RiyZMep/b+1Fh5ZG2RRKfHzq6oBN7PTl9rMKXc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=y+PX0WQlUS+aMrxbczWifK2yFwk6GzTnPP9txmBhQC69v1RZHheL11FUrKYHLnXeX w1d5VzV7HMps8+Ex7NxRTlrDDC0WMB2P0hjisxnjbCzDjSV2Qpkmf7kHw872OWWk46 NBJDVhraAm2RqpBB25Z7Ep8GTKfEonbPZ62LKzWg= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Yi Yang , Sasha Levin Subject: [PATCH 6.1 432/885] serial: tegra: Add missing clk_disable_unprepare() in tegra_uart_hw_init() Date: Tue, 7 Mar 2023 17:56:06 +0100 Message-Id: <20230307170021.188253087@linuxfoundation.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230307170001.594919529@linuxfoundation.org> References: <20230307170001.594919529@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Yi Yang [ Upstream commit 38f28cfe9d08e3a47ef008798b275fef8118fc20 ] Add the missing clk_disable_unprepare() before return from tegra_uart_hw_init() in the error handling path. When request_irq() fails in tegra_uart_startup(), 'tup->uart_clk' has been enabled, fix it by adding clk_disable_unprepare(). Fixes: cc9ca4d95846 ("serial: tegra: Only print FIFO error message when an error occurs") Fixes: d781ec21bae6 ("serial: tegra: report clk rate errors") Signed-off-by: Yi Yang Link: https://lore.kernel.org/r/20221126020852.113378-1-yiyang13@huawei.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/tty/serial/serial-tegra.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/tty/serial/serial-tegra.c b/drivers/tty/serial/serial-tegra.c index cda9cd4fa92c8..c08360212aa20 100644 --- a/drivers/tty/serial/serial-tegra.c +++ b/drivers/tty/serial/serial-tegra.c @@ -1047,6 +1047,7 @@ static int tegra_uart_hw_init(struct tegra_uart_port *tup) if (tup->cdata->fifo_mode_enable_status) { ret = tegra_uart_wait_fifo_mode_enabled(tup); if (ret < 0) { + clk_disable_unprepare(tup->uart_clk); dev_err(tup->uport.dev, "Failed to enable FIFO mode: %d\n", ret); return ret; @@ -1068,6 +1069,7 @@ static int tegra_uart_hw_init(struct tegra_uart_port *tup) */ ret = tegra_set_baudrate(tup, TEGRA_UART_DEFAULT_BAUD); if (ret < 0) { + clk_disable_unprepare(tup->uart_clk); dev_err(tup->uport.dev, "Failed to set baud rate\n"); return ret; } @@ -1227,10 +1229,13 @@ static int tegra_uart_startup(struct uart_port *u) dev_name(u->dev), tup); if (ret < 0) { dev_err(u->dev, "Failed to register ISR for IRQ %d\n", u->irq); - goto fail_hw_init; + goto fail_request_irq; } return 0; +fail_request_irq: + /* tup->uart_clk is already enabled in tegra_uart_hw_init */ + clk_disable_unprepare(tup->uart_clk); fail_hw_init: if (!tup->use_rx_pio) tegra_uart_dma_channel_free(tup, true); -- 2.39.2