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authorHuang Rui <ray.huang@amd.com>2013-06-26 17:08:11 (GMT)
committerFelipe Balbi <balbi@ti.com>2013-07-15 09:59:56 (GMT)
commit1974d494dea05ea227cb42f5e918828801e237aa (patch)
tree85ee4ba1629c3628d69df41d0eb67c3f74cad32f /drivers/usb/dwc3
parent7628083227b6bc4a7e33d7c381d7a4e558424b6b (diff)
downloadlinux-1974d494dea05ea227cb42f5e918828801e237aa.tar.xz
usb: dwc3: fix wrong bit mask in dwc3_event_type
Per dwc3 2.50a spec, the is_devspec bit is used to distinguish the Device Endpoint-Specific Event or Device-Specific Event (DEVT). If the bit is 1, the event is represented Device-Specific Event, then use [7:1] bits as Device Specific Event to marked the type. It has 7 bits, and we can see the reserved8_31 variable name which means from 8 to 31 bits marked reserved, actually there are 24 bits not 25 bits between that. And 1 + 7 + 24 = 32, the event size is 4 byes. So in dwc3_event_type, the bit mask should be: is_devspec [0] 1 bit type [7:1] 7 bits reserved8_31 [31:8] 24 bits This patch should be backported to kernels as old as 3.2, that contain the commit 72246da40f3719af3bfd104a2365b32537c27d83 "usb: Introduce DesignWare USB3 DRD Driver". Cc: <stable@vger.kernel.org> Signed-off-by: Huang Rui <ray.huang@amd.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/dwc3')
-rw-r--r--drivers/usb/dwc3/core.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index b69d322..27dad99 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -759,8 +759,8 @@ struct dwc3 {
struct dwc3_event_type {
u32 is_devspec:1;
- u32 type:6;
- u32 reserved8_31:25;
+ u32 type:7;
+ u32 reserved8_31:24;
} __packed;
#define DWC3_DEPEVT_XFERCOMPLETE 0x01