This is a note to let you know that I've just added the patch titled
usb: dwc3: fix wrong bit mask in dwc3_event_devt
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
usb-dwc3-fix-wrong-bit-mask-in-dwc3_event_devt.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 06f9b6e59661cee510b04513b13ea7927727d758 Mon Sep 17 00:00:00 2001
From: Huang Rui <[email protected]>
Date: Tue, 7 Jan 2014 17:45:50 +0800
Subject: usb: dwc3: fix wrong bit mask in dwc3_event_devt
From: Huang Rui <[email protected]>
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.
[ [email protected] : improve commit log a bit ]
Signed-off-by: Huang Rui <[email protected]>
Signed-off-by: Felipe Balbi <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/usb/dwc3/core.h | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -719,15 +719,15 @@ 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;
/**
Patches currently in stable-queue which might be from [email protected] are
queue-3.4/usb-dwc3-fix-wrong-bit-mask-in-dwc3_event_devt.patch
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