diff options
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/power/trace.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/base/power/trace.c b/drivers/base/power/trace.c index 17e24e3f442..9f4258df4cf 100644 --- a/drivers/base/power/trace.c +++ b/drivers/base/power/trace.c @@ -207,6 +207,37 @@ static int show_dev_hash(unsigned int value) static unsigned int hash_value_early_read; +int show_trace_dev_match(char *buf, size_t size) +{ + unsigned int value = hash_value_early_read / (USERHASH * FILEHASH); + int ret = 0; + struct list_head *entry; + + /* + * It's possible that multiple devices will match the hash and we can't + * tell which is the culprit, so it's best to output them all. + */ + device_pm_lock(); + entry = dpm_list.prev; + while (size && entry != &dpm_list) { + struct device *dev = to_device(entry); + unsigned int hash = hash_string(DEVSEED, dev_name(dev), + DEVHASH); + if (hash == value) { + int len = snprintf(buf, size, "%s\n", + dev_driver_string(dev)); + if (len > size) + len = size; + buf += len; + ret += len; + size -= len; + } + entry = entry->prev; + } + device_pm_unlock(); + return ret; +} + static int early_resume_init(void) { hash_value_early_read = read_magic_time(); |