diff options
| author | Vivek Gautam <gautam.vivek@samsung.com> | 2013-03-21 12:06:48 +0530 |
|---|---|---|
| committer | Sarah Sharp <sarah.a.sharp@linux.intel.com> | 2013-03-25 10:39:18 -0700 |
| commit | 1c11a172cb30492f5f6a82c6e118fdcd9946c34f (patch) | |
| tree | 65c567f41d7e67a63a15c0114478a39cb3785b4b /drivers/usb/host/xhci.h | |
| parent | bafcaf6d84b5d1bf92dabd1ffe7753ed36b7552e (diff) | |
usb: xhci: Fix TRB transfer length macro used for Event TRB.
Use proper macro while extracting TRB transfer length from
Transfer event TRBs. Adding a macro EVENT_TRB_LEN (bits 0:23)
for the same, and use it instead of TRB_LEN (bits 0:16) in
case of event TRBs.
This patch should be backported to kernels as old as 2.6.31, that
contain the commit b10de142119a676552df3f0d2e3a9d647036c26a "USB: xhci:
Bulk transfer support". This patch will have issues applying to older
kernels.
Signed-off-by: Vivek gautam <gautam.vivek@samsung.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: stable@vger.kernel.org
Diffstat (limited to 'drivers/usb/host/xhci.h')
| -rw-r--r-- | drivers/usb/host/xhci.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index d798b693191..63582719e0f 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -972,6 +972,10 @@ struct xhci_transfer_event { __le32 flags; }; +/* Transfer event TRB length bit mask */ +/* bits 0:23 */ +#define EVENT_TRB_LEN(p) ((p) & 0xffffff) + /** Transfer Event bit fields **/ #define TRB_TO_EP_ID(p) (((p) >> 16) & 0x1f) |