diff options
Diffstat (limited to 'drivers/hid/hid-debug.c')
| -rw-r--r-- | drivers/hid/hid-debug.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/drivers/hid/hid-debug.c b/drivers/hid/hid-debug.c index 933fff0fff1..8453214ec37 100644 --- a/drivers/hid/hid-debug.c +++ b/drivers/hid/hid-debug.c @@ -579,18 +579,51 @@ void hid_debug_event(struct hid_device *hdev, char *buf) { int i; struct hid_debug_list *list; + unsigned long flags; + spin_lock_irqsave(&hdev->debug_list_lock, flags); list_for_each_entry(list, &hdev->debug_list, node) { for (i = 0; i < strlen(buf); i++) list->hid_debug_buf[(list->tail + i) % HID_DEBUG_BUFSIZE] = buf[i]; list->tail = (list->tail + i) % HID_DEBUG_BUFSIZE; } + spin_unlock_irqrestore(&hdev->debug_list_lock, flags); wake_up_interruptible(&hdev->debug_wait); } EXPORT_SYMBOL_GPL(hid_debug_event); +void hid_dump_report(struct hid_device *hid, int type, u8 *data, + int size) +{ + struct hid_report_enum *report_enum; + char *buf; + unsigned int i; + + buf = kmalloc(sizeof(char) * HID_DEBUG_BUFSIZE, GFP_ATOMIC); + + if (!buf) + return; + + report_enum = hid->report_enum + type; + + /* dump the report */ + snprintf(buf, HID_DEBUG_BUFSIZE - 1, + "\nreport (size %u) (%snumbered) = ", size, + report_enum->numbered ? "" : "un"); + hid_debug_event(hid, buf); + + for (i = 0; i < size; i++) { + snprintf(buf, HID_DEBUG_BUFSIZE - 1, + " %02x", data[i]); + hid_debug_event(hid, buf); + } + hid_debug_event(hid, "\n"); + kfree(buf); +} +EXPORT_SYMBOL_GPL(hid_dump_report); + void hid_dump_input(struct hid_device *hdev, struct hid_usage *usage, __s32 value) { char *buf; @@ -945,6 +978,7 @@ static int hid_debug_events_open(struct inode *inode, struct file *file) { int err = 0; struct hid_debug_list *list; + unsigned long flags; if (!(list = kzalloc(sizeof(struct hid_debug_list), GFP_KERNEL))) { err = -ENOMEM; @@ -960,7 +994,9 @@ static int hid_debug_events_open(struct inode *inode, struct file *file) file->private_data = list; mutex_init(&list->read_mutex); + spin_lock_irqsave(&list->hdev->debug_list_lock, flags); list_add_tail(&list->node, &list->hdev->debug_list); + spin_unlock_irqrestore(&list->hdev->debug_list_lock, flags); out: return err; @@ -1054,8 +1090,11 @@ static unsigned int hid_debug_events_poll(struct file *file, poll_table *wait) static int hid_debug_events_release(struct inode *inode, struct file *file) { struct hid_debug_list *list = file->private_data; + unsigned long flags; + spin_lock_irqsave(&list->hdev->debug_list_lock, flags); list_del(&list->node); + spin_unlock_irqrestore(&list->hdev->debug_list_lock, flags); kfree(list->hid_debug_buf); kfree(list); |