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path: root/drivers/hid/hid-debug.c
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Diffstat (limited to 'drivers/hid/hid-debug.c')
-rw-r--r--drivers/hid/hid-debug.c36
1 files changed, 36 insertions, 0 deletions
diff --git a/drivers/hid/hid-debug.c b/drivers/hid/hid-debug.c
index 933fff0fff1f..7e56cb3855e3 100644
--- a/drivers/hid/hid-debug.c
+++ b/drivers/hid/hid-debug.c
@@ -580,17 +580,49 @@ void hid_debug_event(struct hid_device *hdev, char *buf)
int i;
struct hid_debug_list *list;
+ mutex_lock(&hdev->debug_list_lock);
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;
}
+ mutex_unlock(&hdev->debug_list_lock);
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;
@@ -960,7 +992,9 @@ static int hid_debug_events_open(struct inode *inode, struct file *file)
file->private_data = list;
mutex_init(&list->read_mutex);
+ mutex_lock(&list->hdev->debug_list_lock);
list_add_tail(&list->node, &list->hdev->debug_list);
+ mutex_unlock(&list->hdev->debug_list_lock);
out:
return err;
@@ -1055,7 +1089,9 @@ static int hid_debug_events_release(struct inode *inode, struct file *file)
{
struct hid_debug_list *list = file->private_data;
+ mutex_lock(&list->hdev->debug_list_lock);
list_del(&list->node);
+ mutex_unlock(&list->hdev->debug_list_lock);
kfree(list->hid_debug_buf);
kfree(list);