[PATCH] Generic HID layer - input and event reporting

hid_input_report() was needlessly USB-specific in USB HID. This patch
makes the function independent of HID implementation and fixes all
the current users. Bluetooth patches comply with this prototype.

Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

4 files changed, 68 insertions, 62 deletions

diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index 1dd9e4f0df1e..18c2b3cf6bcc 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -940,5 +940,64 @@ int hid_set_field(struct hid_field *field, unsigned offset, __s32 value)
 }
 EXPORT_SYMBOL_GPL(hid_set_field);
 
+int hid_input_report(struct hid_device *hid, int type, u8 *data, int size, int interrupt)
+{
+        struct hid_report_enum *report_enum = hid->report_enum + type;
+        struct hid_report *report;
+        int n, rsize;
+
+        if (!hid)
+                return -ENODEV;
+
+        if (!size) {
+                dbg("empty report");
+                return -1;
+        }
+
+#ifdef DEBUG_DATA
+        printk(KERN_DEBUG __FILE__ ": report (size %u) (%snumbered)\n", len, report_enum->numbered ? "" : "un");
+#endif
+
+        n = 0;                          /* Normally report number is 0 */
+        if (report_enum->numbered) {    /* Device uses numbered reports, data[0] is report number */
+                n = *data++;
+                size--;
+        }
+
+#ifdef DEBUG_DATA
+        {
+                int i;
+                printk(KERN_DEBUG __FILE__ ": report %d (size %u) = ", n, size);
+                for (i = 0; i < size; i++)
+                        printk(" %02x", data[i]);
+                printk("\n");
+        }
+#endif
+
+        if (!(report = report_enum->report_id_hash[n])) {
+                dbg("undefined report_id %d received", n);
+                return -1;
+        }
+
+        rsize = ((report->size - 1) >> 3) + 1;
+
+        if (size < rsize) {
+                dbg("report %d is too short, (%d < %d)", report->id, size, rsize);
+                return -1;
+        }
+
+        if ((hid->claimed & HID_CLAIMED_HIDDEV) && hid->hiddev_report_event)
+                hid->hiddev_report_event(hid, report);
+
+        for (n = 0; n < report->maxfield; n++)
+                hid_input_field(hid, report->field[n], data, interrupt);
+
+        if (hid->claimed & HID_CLAIMED_INPUT)
+                hidinput_report_event(hid, report);
+
+        return 0;
+}
+EXPORT_SYMBOL_GPL(hid_input_report);
+
 MODULE_LICENSE(DRIVER_LICENSE);
 
diff --git a/drivers/usb/input/hid-core.c b/drivers/usb/input/hid-core.c
index 4fc828041d0f..a20ff61624b1 100644
--- a/drivers/usb/input/hid-core.c
+++ b/drivers/usb/input/hid-core.c
@@ -169,65 +169,6 @@ done:
         spin_unlock_irqrestore(&usbhid->inlock, flags);
 }
 
-
-static int hid_input_report(int type, struct urb *urb, int interrupt)
-{
-        struct hid_device *hid = urb->context;
-        struct hid_report_enum *report_enum = hid->report_enum + type;
-        u8 *data = urb->transfer_buffer;
-        int len = urb->actual_length;
-        struct hid_report *report;
-        int n, size;
-
-        if (!len) {
-                dbg("empty report");
-                return -1;
-        }
-
-#ifdef DEBUG_DATA
-        printk(KERN_DEBUG __FILE__ ": report (size %u) (%snumbered)\n", len, report_enum->numbered ? "" : "un");
-#endif
-
-        n = 0;                          /* Normally report number is 0 */
-        if (report_enum->numbered) {    /* Device uses numbered reports, data[0] is report number */
-                n = *data++;
-                len--;
-        }
-
-#ifdef DEBUG_DATA
-        {
-                int i;
-                printk(KERN_DEBUG __FILE__ ": report %d (size %u) = ", n, len);
-                for (i = 0; i < len; i++)
-                        printk(" %02x", data[i]);
-                printk("\n");
-        }
-#endif
-
-        if (!(report = report_enum->report_id_hash[n])) {
-                dbg("undefined report_id %d received", n);
-                return -1;
-        }
-
-        size = ((report->size - 1) >> 3) + 1;
-
-        if (len < size) {
-                dbg("report %d is too short, (%d < %d)", report->id, len, size);
-                memset(data + len, 0, size - len);
-        }
-
-        if (hid->claimed & HID_CLAIMED_HIDDEV)
-                hiddev_report_event(hid, report);
-
-        for (n = 0; n < report->maxfield; n++)
-                hid_input_field(hid, report->field[n], data, interrupt);
-
-        if (hid->claimed & HID_CLAIMED_INPUT)
-                hidinput_report_event(hid, report);
-
-        return 0;
-}
-
 /*
  * Input interrupt completion handler.
  */
@@ -241,7 +182,9 @@ static void hid_irq_in(struct urb *urb)
         switch (urb->status) {
                 case 0:                 /* success */
                         usbhid->retry_delay = 0;
-                        hid_input_report(HID_INPUT_REPORT, urb, 1);
+                        hid_input_report(urb->context, HID_INPUT_REPORT,
+                                         urb->transfer_buffer,
+                                         urb->actual_length, 1);
                         break;
                 case -EPIPE:            /* stall */
                         clear_bit(HID_IN_RUNNING, &usbhid->iofl);
@@ -426,7 +369,8 @@ static void hid_ctrl(struct urb *urb)
         switch (urb->status) {
                 case 0:                 /* success */
                         if (usbhid->ctrl[usbhid->ctrltail].dir == USB_DIR_IN)
-                                hid_input_report(usbhid->ctrl[usbhid->ctrltail].report->type, urb, 0);
+                                hid_input_report(urb->context, usbhid->ctrl[usbhid->ctrltail].report->type,
+                                                urb->transfer_buffer, urb->actual_length, 0);
                         break;
                 case -ESHUTDOWN:        /* unplug */
                         unplug = 1;
@@ -1286,6 +1230,7 @@ static struct hid_device *usb_hid_configure(struct usb_interface *intf)
         hid->hidinput_close = hidinput_close;
 #ifdef CONFIG_USB_HIDDEV
         hid->hiddev_hid_event = hiddev_hid_event;
+        hid->hiddev_report_event = hiddev_report_event;
 #endif
 
         return hid;
diff --git a/drivers/usb/input/hiddev.c b/drivers/usb/input/hiddev.c
index 0c2647eb9eec..114d6c9f64b1 100644
--- a/drivers/usb/input/hiddev.c
+++ b/drivers/usb/input/hiddev.c
@@ -214,6 +214,7 @@ void hiddev_report_event(struct hid_device *hid, struct hid_report *report)
 
         hiddev_send_event(hid, &uref);
 }
+
 /*
  * fasync file op
  */
diff --git a/include/linux/hid.h b/include/linux/hid.h
index 5a969a137b85..342b4e639acb 100644
--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -436,7 +436,7 @@ struct hid_device {							/* device report descriptor */
         /* hiddev event handler */
         void (*hiddev_hid_event) (struct hid_device *, struct hid_field *field,
                                   struct hid_usage *, __s32);
-
+        void (*hiddev_report_event) (struct hid_device *, struct hid_report *);
 #ifdef CONFIG_USB_HIDINPUT_POWERBOOK
         unsigned long pb_pressed_fn[NBITS(KEY_MAX)];
         unsigned long pb_pressed_numlock[NBITS(KEY_MAX)];
@@ -492,6 +492,7 @@ extern int hidinput_connect(struct hid_device *);
 extern void hidinput_disconnect(struct hid_device *);
 
 int hid_set_field(struct hid_field *, unsigned, __s32);
+int hid_input_report(struct hid_device *, int type, u8 *, int, int);
 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field);
 void hid_input_field(struct hid_device *hid, struct hid_field *field, __u8 *data, int interrupt);
 void hid_output_report(struct hid_report *report, __u8 *data);