From 22ad1e7f86e1fb96488d71512e2797153a6ad839 Mon Sep 17 00:00:00 2001 From: Sarah Sharp Date: Fri, 2 Apr 2010 15:33:56 -0700 Subject: [PATCH] USB: Add parsing of SuperSpeed endpoint companion descriptor. Allow the xHCI drivers (and any new USB 3.0 drivers) to parse the SuperSpeed endpoint companion descriptor to find the maximum number of bulk endpoint streams the endpoint supports. This is used to calculate the maximum total number of streams the driver can allocate. Signed-off-by: Sarah Sharp Signed-off-by: Greg Kroah-Hartman --- include/linux/usb/ch9.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/include/linux/usb/ch9.h b/include/linux/usb/ch9.h index e58369ff8168..603b61aadd65 100644 --- a/include/linux/usb/ch9.h +++ b/include/linux/usb/ch9.h @@ -556,6 +556,8 @@ struct usb_ss_ep_comp_descriptor { } __attribute__ ((packed)); #define USB_DT_SS_EP_COMP_SIZE 6 +/* Bits 4:0 of bmAttributes if this is a bulk endpoint */ +#define USB_SS_MAX_STREAMS(p) (1 << (p & 0x1f)) /*-------------------------------------------------------------------------*/ -- 2.20.1