uart drivers: use xzalloc instead of xmalloc

The flags in struct console_device have to be initialized
to zero. Otherwise the following can happen:

- console_register sets the initial baudrate of a new console
  before we set the global console init state to CONSOLE_INIT_FULL.
- In console_baudrate_set we test whether the current console is
  active which may be true because of unitialized flags.
- we then call getc() to wait for the user to accept the new settings
  and we are stuck because of the CONSOLE_UNINITIALIZED state
  we will never get anything from getc().

Looking back this explains some cases for me when barebox refused
to start and I really wonder why this did not become a more visible
problem before.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/serial/serial_imx.c b/drivers/serial/serial_imx.c
index 4923dcbd94..8547f36171 100644
--- a/drivers/serial/serial_imx.c
+++ b/drivers/serial/serial_imx.c
@@ -320,7 +320,7 @@ static int imx_serial_probe(struct device_d *dev)
 	struct imx_serial_priv *priv;
 	uint32_t val;
 
-	priv = xmalloc(sizeof(*priv));
+	priv = xzalloc(sizeof(*priv));
 	cdev = &priv->cdev;
 
 	priv->regs = dev_request_mem_region(dev, 0);