1 files changed, 32 insertions, 44 deletions

diff --git a/drivers/hid/hid-logitech-dj.c b/drivers/hid/hid-logitech-dj.c
index 2b56efcbdf61..5e8a7ed42344 100644
--- a/drivers/hid/hid-logitech-dj.c
+++ b/drivers/hid/hid-logitech-dj.c
@@ -26,6 +26,7 @@
 #include <linux/hid.h>
 #include <linux/module.h>
 #include <linux/usb.h>
+#include <asm/unaligned.h>
 #include "usbhid/usbhid.h"
 #include "hid-ids.h"
 #include "hid-logitech-dj.h"
@@ -155,6 +156,14 @@ static const char media_descriptor[] = {
 /* Maximum size of all defined hid reports in bytes (including report id) */
 #define MAX_REPORT_SIZE 8
 
+/* Make sure all descriptors are present here */
+#define MAX_RDESC_SIZE                          \
+        (sizeof(kbd_descriptor) +               \
+         sizeof(mse_descriptor) +               \
+         sizeof(consumer_descriptor) +          \
+         sizeof(syscontrol_descriptor) +        \
+         sizeof(media_descriptor))
+
 /* Number of possible hid report types that can be created by this driver.
  *
  * Right now, RF report types have the same report types (or report id's)
@@ -265,8 +274,8 @@ static void logi_dj_recv_add_djhid_device(struct dj_receiver_dev *djrcv_dev,
                 goto dj_device_allocate_fail;
         }
 
-        dj_dev->reports_supported = le32_to_cpu(
-                dj_report->report_params[DEVICE_PAIRED_RF_REPORT_TYPE]);
+        dj_dev->reports_supported = get_unaligned_le32(
+                dj_report->report_params + DEVICE_PAIRED_RF_REPORT_TYPE);
         dj_dev->hdev = dj_hiddev;
         dj_dev->dj_receiver_dev = djrcv_dev;
         dj_dev->device_index = dj_report->device_index;
@@ -473,9 +482,17 @@ static int logi_dj_output_hidraw_report(struct hid_device *hid, u8 * buf,
         return 0;
 }
 
+static void rdcat(char **rdesc, unsigned int *rsize, const char *data, unsigned int size)
+{
+        memcpy(*rdesc + *rsize, data, size);
+        *rsize += size;
+}
+
 static int logi_dj_ll_parse(struct hid_device *hid)
 {
         struct dj_device *djdev = hid->driver_data;
+        unsigned int rsize = 0;
+        char *rdesc;
         int retval;
 
         dbg_hid("%s\n", __func__);
@@ -483,70 +500,38 @@ static int logi_dj_ll_parse(struct hid_device *hid)
         djdev->hdev->version = 0x0111;
         djdev->hdev->country = 0x00;
 
+        rdesc = kmalloc(MAX_RDESC_SIZE, GFP_KERNEL);
+        if (!rdesc)
+                return -ENOMEM;
+
         if (djdev->reports_supported & STD_KEYBOARD) {
                 dbg_hid("%s: sending a kbd descriptor, reports_supported: %x\n",
                         __func__, djdev->reports_supported);
-                retval = hid_parse_report(hid,
-                                          (u8 *) kbd_descriptor,
-                                          sizeof(kbd_descriptor));
-                if (retval) {
-                        dbg_hid("%s: sending a kbd descriptor, hid_parse failed"
-                                " error: %d\n", __func__, retval);
-                        return retval;
-                }
+                rdcat(&rdesc, &rsize, kbd_descriptor, sizeof(kbd_descriptor));
         }
 
         if (djdev->reports_supported & STD_MOUSE) {
                 dbg_hid("%s: sending a mouse descriptor, reports_supported: "
                         "%x\n", __func__, djdev->reports_supported);
-                retval = hid_parse_report(hid,
-                                          (u8 *) mse_descriptor,
-                                          sizeof(mse_descriptor));
-                if (retval) {
-                        dbg_hid("%s: sending a mouse descriptor, hid_parse "
-                                "failed error: %d\n", __func__, retval);
-                        return retval;
-                }
+                rdcat(&rdesc, &rsize, mse_descriptor, sizeof(mse_descriptor));
         }
 
         if (djdev->reports_supported & MULTIMEDIA) {
                 dbg_hid("%s: sending a multimedia report descriptor: %x\n",
                         __func__, djdev->reports_supported);
-                retval = hid_parse_report(hid,
-                                          (u8 *) consumer_descriptor,
-                                          sizeof(consumer_descriptor));
-                if (retval) {
-                        dbg_hid("%s: sending a consumer_descriptor, hid_parse "
-                                "failed error: %d\n", __func__, retval);
-                        return retval;
-                }
+                rdcat(&rdesc, &rsize, consumer_descriptor, sizeof(consumer_descriptor));
         }
 
         if (djdev->reports_supported & POWER_KEYS) {
                 dbg_hid("%s: sending a power keys report descriptor: %x\n",
                         __func__, djdev->reports_supported);
-                retval = hid_parse_report(hid,
-                                          (u8 *) syscontrol_descriptor,
-                                          sizeof(syscontrol_descriptor));
-                if (retval) {
-                        dbg_hid("%s: sending a syscontrol_descriptor, "
-                                "hid_parse failed error: %d\n",
-                                __func__, retval);
-                        return retval;
-                }
+                rdcat(&rdesc, &rsize, syscontrol_descriptor, sizeof(syscontrol_descriptor));
         }
 
         if (djdev->reports_supported & MEDIA_CENTER) {
                 dbg_hid("%s: sending a media center report descriptor: %x\n",
                         __func__, djdev->reports_supported);
-                retval = hid_parse_report(hid,
-                                          (u8 *) media_descriptor,
-                                          sizeof(media_descriptor));
-                if (retval) {
-                        dbg_hid("%s: sending a media_descriptor, hid_parse "
-                                "failed error: %d\n", __func__, retval);
-                        return retval;
-                }
+                rdcat(&rdesc, &rsize, media_descriptor, sizeof(media_descriptor));
         }
 
         if (djdev->reports_supported & KBD_LEDS) {
@@ -554,7 +539,10 @@ static int logi_dj_ll_parse(struct hid_device *hid)
                         __func__, djdev->reports_supported);
         }
 
-        return 0;
+        retval = hid_parse_report(hid, rdesc, rsize);
+        kfree(rdesc);
+
+        return retval;
 }
 
 static int logi_dj_ll_input_event(struct input_dev *dev, unsigned int type,