[U-Boot] [PATCH 2/7] serial: serial_msm: fail probe if settings clocks fails

[Ramon Fried]

Failure to set the clocks will causes data abort exception when
trying to write to AHB uart registers.
This patch ensures that we don't touch these registers if clock
setting failed.

Signed-off-by: Ramon Fried <ramon.fried at gmail.com>
---
 drivers/serial/serial_msm.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/serial/serial_msm.c b/drivers/serial/serial_msm.c
index 119e6b9846..250e48c996 100644
--- a/drivers/serial/serial_msm.c
+++ b/drivers/serial/serial_msm.c
@@ -183,8 +183,8 @@ static int msm_serial_probe(struct udevice *dev)
 {
 	struct msm_serial_data *priv = dev_get_priv(dev);
 
-	msm_uart_clk_init(dev); /* Ignore return value and hope clock was
-				  properly initialized by earlier loaders */
+	if (msm_uart_clk_init(dev))
+		return -EINVAL;
 
 	if (readl(priv->base + UARTDM_SR) & UARTDM_SR_UART_OVERRUN)
 		writel(UARTDM_CR_CMD_RESET_ERR, priv->base + UARTDM_CR);
-- 
2.14.1