usb: dwc3: fix wrong bit mask in dwc3_event_devt

commit 06f9b6e59661cee510b04513b13ea7927727d758 upstream.

Around DWC USB3 2.30a release another bit has been added to the
Device-Specific Event (DEVT) Event Information (EvtInfo) bitfield.

Because of that, what used to be 8 bits long, has become 9 bits long.

Per dwc3 2.30a+ spec in the Device-Specific Event (DEVT), the field of
Event Information Bits(EvtInfo) uses [24:16] bits, and it has 9 bits
not 8 bits. And the following reserved field uses [31:25] bits not
[31:24] bits, and it has 7 bits.

So in dwc3_event_devt, the bit mask should be:
event_info	[24:16]		9 bits
reserved31_25	[31:25]		7 bits

This patch makes sure that newer core releases will work fine with
Linux and that we will decode the event information properly on new
core releases.

[ balbi@ti.com : improve commit log a bit ]

Signed-off-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 4795c0c..ae2b763 100644 (file)
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -716,15 +716,15 @@ struct dwc3_event_depevt {
  *     12      - VndrDevTstRcved
  * @reserved15_12: Reserved, not used
  * @event_info: Information about this event
- * @reserved31_24: Reserved, not used
+ * @reserved31_25: Reserved, not used
  */
 struct dwc3_event_devt {
        u32     one_bit:1;
        u32     device_event:7;
        u32     type:4;
        u32     reserved15_12:4;
-       u32     event_info:8;
-       u32     reserved31_24:8;
+       u32     event_info:9;
+       u32     reserved31_25:7;
 } __packed;
 
 /**