[PATCH v1 1/2] add device state flags and add error state

[Oleksij Rempel]

Add state flags for each registered device and set error state on each
dev_err print.
This states can be used by users to identify erroneous device.

Signed-off-by: Oleksij Rempel <o.rempel at pengutronix.de>
---
 include/driver.h | 13 +++++++++++++
 include/printk.h |  5 ++++-
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/include/driver.h b/include/driver.h
index d84fe35d50..b64a8e258c 100644
--- a/include/driver.h
+++ b/include/driver.h
@@ -88,6 +88,9 @@ struct device_d {
 	 * when the driver should actually detect client devices
 	 */
 	int     (*detect) (struct device_d *);
+
+#define DEV_ERR			BIT(0)
+	u32	run_flags;
 };
 
 /** @brief Describes a driver present in the system */
@@ -361,6 +364,16 @@ static inline int dev_close_default(struct device_d *dev, struct filep *f)
 	return 0;
 }
 
+static inline void dev_set_err(struct device_d *dev)
+{
+	dev->run_flags |= DEV_ERR;
+}
+
+static inline bool dev_have_err(struct device_d *dev)
+{
+	return !!(dev->run_flags & DEV_ERR);
+}
+
 struct bus_type {
 	char *name;
 	int (*match)(struct device_d *dev, struct driver_d *drv);
diff --git a/include/printk.h b/include/printk.h
index f83ad3bf07..6c563be3e6 100644
--- a/include/printk.h
+++ b/include/printk.h
@@ -61,7 +61,10 @@ static inline int pr_print(int level, const char *format, ...)
 #define dev_crit(dev, format, arg...)		\
 	__dev_printf(2, (dev) , format , ## arg)
 #define dev_err(dev, format, arg...)		\
-	__dev_printf(3, (dev) , format , ## arg)
+	({ \
+		dev_set_err(dev); \
+		__dev_printf(3, (dev) , format , ## arg); \
+	})
 #define dev_warn(dev, format, arg...)		\
 	__dev_printf(4, (dev) , format , ## arg)
 #define dev_notice(dev, format, arg...)		\
-- 
2.29.2