Input: serio - add modalias attribute and environment variable to
simplify hotplug scripts.
Signed-off-by: Dmitry Torokhov <[email protected]>
---
drivers/input/serio/serio.c | 42 ++++++++++++++++++++++++++----------------
1 files changed, 26 insertions(+), 16 deletions(-)
Index: work/drivers/input/serio/serio.c
===================================================================
--- work.orig/drivers/input/serio/serio.c
+++ work/drivers/input/serio/serio.c
@@ -389,6 +389,14 @@ static ssize_t serio_show_description(st
return sprintf(buf, "%s\n", serio->name);
}
+static ssize_t serio_show_modalias(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct serio *serio = to_serio_port(dev);
+
+ return sprintf(buf, "serio:ty%02Xpr%02Xid%02Xex%02X\n",
+ serio->id.type, serio->id.proto, serio->id.id, serio->id.extra);
+}
+
static ssize_t serio_show_id_type(struct device *dev, struct device_attribute *attr, char *buf)
{
struct serio *serio = to_serio_port(dev);
@@ -487,6 +495,7 @@ static ssize_t serio_set_bind_mode(struc
static struct device_attribute serio_device_attrs[] = {
__ATTR(description, S_IRUGO, serio_show_description, NULL),
+ __ATTR(modalias, S_IRUGO, serio_show_modalias, NULL),
__ATTR(drvctl, S_IWUSR, NULL, serio_rebind_driver),
__ATTR(bind_mode, S_IWUSR | S_IRUGO, serio_show_bind_mode, serio_set_bind_mode),
__ATTR_NULL
@@ -785,36 +794,37 @@ static int serio_bus_match(struct device
#ifdef CONFIG_HOTPLUG
-#define PUT_ENVP(fmt, val) \
-do { \
- envp[i++] = buffer; \
- length += snprintf(buffer, buffer_size - length, fmt, val); \
- if (buffer_size - length <= 0 || i >= num_envp) \
- return -ENOMEM; \
- length++; \
- buffer += length; \
-} while (0)
+#define SERIO_ADD_HOTPLUG_VAR(fmt, val...) \
+ do { \
+ int err = add_hotplug_env_var(envp, num_envp, &i, \
+ buffer, buffer_size, &len, \
+ fmt, val); \
+ if (err) \
+ return err; \
+ } while (0)
+
static int serio_hotplug(struct device *dev, char **envp, int num_envp, char *buffer, int buffer_size)
{
struct serio *serio;
int i = 0;
- int length = 0;
+ int len = 0;
if (!dev)
return -ENODEV;
serio = to_serio_port(dev);
- PUT_ENVP("SERIO_TYPE=%02x", serio->id.type);
- PUT_ENVP("SERIO_PROTO=%02x", serio->id.proto);
- PUT_ENVP("SERIO_ID=%02x", serio->id.id);
- PUT_ENVP("SERIO_EXTRA=%02x", serio->id.extra);
-
+ SERIO_ADD_HOTPLUG_VAR("SERIO_TYPE=%02x", serio->id.type);
+ SERIO_ADD_HOTPLUG_VAR("SERIO_PROTO=%02x", serio->id.proto);
+ SERIO_ADD_HOTPLUG_VAR("SERIO_ID=%02x", serio->id.id);
+ SERIO_ADD_HOTPLUG_VAR("SERIO_EXTRA=%02x", serio->id.extra);
+ SERIO_ADD_HOTPLUG_VAR("MODALIAS=serio:ty%02Xpr%02Xid%02Xex%02X",
+ serio->id.type, serio->id.proto, serio->id.id, serio->id.extra);
envp[i] = NULL;
return 0;
}
-#undef PUT_ENVP
+#undef SERIO_ADD_HOTPLUG_VAR
#else
-
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