linux-kernel - [PATCH 4/7] tty: xilinx_uartps: Check clk

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Message-ID: <20220429081422.3630070-5-shubhrajyoti.datta@xilinx.com>
Date:   Fri, 29 Apr 2022 13:44:19 +0530
From:   Shubhrajyoti Datta <shubhrajyoti.datta@...inx.com>
To:     <linux-serial@...r.kernel.org>
CC:     <michal.simek@...inx.com>, <jirislaby@...nel.org>,
        <gregkh@...uxfoundation.org>, <git@...inx.com>,
        <linux-kernel@...r.kernel.org>,
        Shubhrajyoti Datta <shubhrajyoti.datta@...inx.com>
Subject: [PATCH 4/7] tty: xilinx_uartps: Check clk_enable return value

Check for the clock enable return value.

Addresses-Coverity: Event check_return.
Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@...inx.com>
---
 drivers/tty/serial/xilinx_uartps.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c
index 868f4e587263..bf0415f0a194 100644
--- a/drivers/tty/serial/xilinx_uartps.c
+++ b/drivers/tty/serial/xilinx_uartps.c
@@ -1347,12 +1347,18 @@ static int cdns_uart_resume(struct device *device)
 	unsigned long flags;
 	u32 ctrl_reg;
 	int may_wake;
+	int ret;
 
 	may_wake = device_may_wakeup(device);
 
 	if (console_suspend_enabled && uart_console(port) && !may_wake) {
-		clk_enable(cdns_uart->pclk);
-		clk_enable(cdns_uart->uartclk);
+		ret = clk_enable(cdns_uart->pclk);
+		if (ret)
+			return ret;
+
+		ret = clk_enable(cdns_uart->uartclk);
+		if (ret)
+			return ret;
 
 		spin_lock_irqsave(&port->lock, flags);
 
-- 
2.25.1