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Subject[PATCH] driver core: Make probe_type of driver accessible via sysfs
Date
Like drivers_autoprobe of bus, make probe_type of driver
accessible via sysfs, so we can get and set a driver's probe_type
happily.

Signed-off-by: Wenchao Hao <haowenchao@huawei.com>
---
drivers/base/bus.c | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)

diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index 1f6b4bd61056..e006562cb638 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -583,6 +583,25 @@ static ssize_t uevent_store(struct device_driver *drv, const char *buf,
}
static DRIVER_ATTR_WO(uevent);

+static ssize_t probe_type_show(struct device_driver *drv, char *buf)
+{
+ return sysfs_emit(buf, "%d\n", drv->probe_type);
+}
+
+static ssize_t probe_type_store(struct device_driver *drv, const char *buf,
+ size_t count)
+{
+ if (buf[0] == '0')
+ drv->probe_type = 0;
+ else if (buf[0] == '1')
+ drv->probe_type = 1;
+ else if (buf[0] == '2')
+ drv->probe_type = 2;
+
+ return count;
+}
+static DRIVER_ATTR_RW(probe_type);
+
/**
* bus_add_driver - Add a driver to the bus.
* @drv: driver.
@@ -626,6 +645,12 @@ int bus_add_driver(struct device_driver *drv)
printk(KERN_ERR "%s: uevent attr (%s) failed\n",
__func__, drv->name);
}
+ error = driver_create_file(drv, &driver_attr_probe_type);
+ if (error) {
+ printk(KERN_ERR "%s: probe_type attr (%s) failed\n",
+ __func__, drv->name);
+ }
+
error = driver_add_groups(drv, bus->drv_groups);
if (error) {
/* How the hell do we get out of this pickle? Give up */
--
2.27.0
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