We have moved the busy-wait loop out of drivers and into the uclass. This
means that we must reset the watchdog when busy-waiting.
Note: some drivers may still have a busy-wait even with driver model, as
a transition mechanism. Driver model will tolerate this, and is can be
cleaned up when all users of the driver use driver model. An example is
ns16550.
Signed-off-by: Simon Glass <s...@chromium.org>
---
drivers/serial/serial-uclass.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/serial/serial-uclass.c b/drivers/serial/serial-uclass.c
index e93c624..aeaf2d2 100644
--- a/drivers/serial/serial-uclass.c
+++ b/drivers/serial/serial-uclass.c
@@ -11,9 +11,12 @@
#include <os.h>
#include <serial.h>
#include <stdio_dev.h>
+#include <watchdog.h>
#include <dm/lists.h>
#include <dm/device-internal.h>
+#include <ns16550.h>
+
DECLARE_GLOBAL_DATA_PTR;
/* The currently-selected console serial device */
@@ -119,6 +122,8 @@ static int serial_getc_dev(struct udevice *dev)
do {
err = ops->getc(dev);
+ if (err == -EAGAIN)
+ WATCHDOG_RESET();
} while (err == -EAGAIN);
return err >= 0 ? err : 0;
--
2.1.0.rc2.206.gedb03e5
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