HID: sony: Don't use magic numbers in sixaxis_set_operational_usb()

Remove the magic numbers used in sixaxis_set_operational_usb():
  - use the already defined SIXAXIS_REPORT_0xF2_SIZE;
  - define and use SIXAXIS_REPORT_0xF5_SIZE;
  - set the dummy buffer size to accommodate any report that is going to
    be requested.

Signed-off-by: Antonio Ospite <ao2@ao2.it>
Acked-by: Frank Praznik <frank.praznik@oh.rr.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

1 files changed, 8 insertions, 5 deletions

diff --git a/drivers/hid/hid-sony.c b/drivers/hid/hid-sony.c
index 4d6376cac0bd..64f2f51e6698 100644
--- a/drivers/hid/hid-sony.c
+++ b/drivers/hid/hid-sony.c
@@ -803,6 +803,7 @@ union sixaxis_output_report_01 {
 #define DS4_REPORT_0x11_SIZE 78
 #define DS4_REPORT_0x81_SIZE 7
 #define SIXAXIS_REPORT_0xF2_SIZE 17
+#define SIXAXIS_REPORT_0xF5_SIZE 8
 
 static spinlock_t sony_dev_list_lock;
 static LIST_HEAD(sony_device_list);
@@ -1131,13 +1132,15 @@ static void sony_input_configured(struct hid_device *hdev,
 static int sixaxis_set_operational_usb(struct hid_device *hdev)
 {
         int ret;
-        char *buf = kmalloc(18, GFP_KERNEL);
+        const int buf_size =
+                max(SIXAXIS_REPORT_0xF2_SIZE, SIXAXIS_REPORT_0xF5_SIZE);
+        char *buf = kmalloc(buf_size, GFP_KERNEL);
 
         if (!buf)
                 return -ENOMEM;
 
-        ret = hid_hw_raw_request(hdev, 0xf2, buf, 17, HID_FEATURE_REPORT,
-                                 HID_REQ_GET_REPORT);
+        ret = hid_hw_raw_request(hdev, 0xf2, buf, SIXAXIS_REPORT_0xF2_SIZE,
+                                 HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
 
         if (ret < 0) {
                 hid_err(hdev, "can't set operational mode: step 1\n");
@@ -1148,8 +1151,8 @@ static int sixaxis_set_operational_usb(struct hid_device *hdev)
          * Some compatible controllers like the Speedlink Strike FX and
          * Gasia need another query plus an USB interrupt to get operational.
          */
-        ret = hid_hw_raw_request(hdev, 0xf5, buf, 8, HID_FEATURE_REPORT,
-                                 HID_REQ_GET_REPORT);
+        ret = hid_hw_raw_request(hdev, 0xf5, buf, SIXAXIS_REPORT_0xF5_SIZE,
+                                 HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
 
         if (ret < 0) {
                 hid_err(hdev, "can't set operational mode: step 2\n");