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Commit 8fcb01f1 authored by Meghana Ashok's avatar Meghana Ashok Committed by Gerrit - the friendly Code Review server
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soc: qcom: ssr: Add subsys_set_error API 



Adding a new API subsys_set_error() which can indicate reason why a
subsystem failed to come up. This error reason can be useful for some
userspace helper application to take appropriate action.

Change-Id: I6df3580befd48a6b83bb8fd1099475da42fc9cf2
Signed-off-by: default avatarMeghana Ashok <meghanaa@codeaurora.org>
parent f5c81bb5

drivers/soc/qcom/subsystem_restart.c

+14 −0
Original line number Diff line number Diff line
@@ -160,6 +160,7 @@ struct subsys_device { 
	struct work_struct work;

	struct wakeup_source ssr_wlock;

	char wlname[64];

	char error_buf[64];

	struct work_struct device_restart_work;

	struct subsys_tracking track;
@@ -351,6 +352,12 @@ static void subsys_set_state(struct subsys_device *subsys, 
	spin_unlock_irqrestore(&subsys->track.s_lock, flags);

}



static ssize_t error_show(struct device *dev,

				struct device_attribute *attr, char *buf)

{

	return snprintf(buf, PAGE_SIZE, "%s\n", to_subsys(dev)->error_buf);

}



/**

 * subsytem_default_online() - Mark a subsystem as online by default

 * @dev: subsystem to mark as online
@@ -369,6 +376,7 @@ static struct device_attribute subsys_attrs[] = { 
	__ATTR_RO(name),

	__ATTR_RO(state),

	__ATTR_RO(crash_count),

	__ATTR_RO(error),

	__ATTR(restart_level, 0644, restart_level_show, restart_level_store),

	__ATTR(firmware_name, 0644, firmware_name_show, firmware_name_store),

	__ATTR(system_debug, 0644, system_debug_show, system_debug_store),
@@ -1180,6 +1188,12 @@ bool subsys_get_crash_status(struct subsys_device *dev) 
	return dev->crashed;

}



void subsys_set_error(struct subsys_device *dev, const char *error_msg)

{

	snprintf(dev->error_buf, sizeof(dev->error_buf), "%s", error_msg);

	sysfs_notify(&dev->dev.kobj, NULL, "error");

}



static struct subsys_device *desc_to_subsys(struct device *d)

{

	struct subsys_device *device, *subsys_dev = 0;

include/soc/qcom/subsystem_restart.h

+1 −0
Original line number Diff line number Diff line
@@ -125,6 +125,7 @@ extern void subsys_unregister(struct subsys_device *dev); 
extern void subsys_default_online(struct subsys_device *dev);

extern void subsys_set_crash_status(struct subsys_device *dev, bool crashed);

extern bool subsys_get_crash_status(struct subsys_device *dev);

extern void subsys_set_error(struct subsys_device *dev, const char *error_msg);

void notify_proxy_vote(struct device *device);

void notify_proxy_unvote(struct device *device);

void complete_err_ready(struct subsys_device *subsys);