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authorClark Williams <williams@redhat.com>2012-01-12 22:11:05 -0600
committerClark Williams <williams@redhat.com>2012-01-12 22:11:05 -0600
commit937f5e333d0b05638126f651135d3b8fd6b43665 (patch)
tree8c85f620680aca1496b8914288bb38ce11c320fc /include/linux/usb/ch9.h
parentd76fe430665fac3f44ee88958713ecc524fd778d (diff)
parentb8ed9e5b8c34dc9fb1882669e45b21e3d0194881 (diff)
Merge commit 'v3.2.1' into rt-3.2.1-rt9v3.2.1-rt9
Diffstat (limited to 'include/linux/usb/ch9.h')
-rw-r--r--include/linux/usb/ch9.h20
1 files changed, 19 insertions, 1 deletions
diff --git a/include/linux/usb/ch9.h b/include/linux/usb/ch9.h
index d5da6c68c250..61b29057b054 100644
--- a/include/linux/usb/ch9.h
+++ b/include/linux/usb/ch9.h
@@ -605,8 +605,26 @@ 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))
+static inline int
+usb_ss_max_streams(const struct usb_ss_ep_comp_descriptor *comp)
+{
+ int max_streams;
+
+ if (!comp)
+ return 0;
+
+ max_streams = comp->bmAttributes & 0x1f;
+
+ if (!max_streams)
+ return 0;
+
+ max_streams = 1 << max_streams;
+
+ return max_streams;
+}
+
/* Bits 1:0 of bmAttributes if this is an isoc endpoint */
#define USB_SS_MULT(p) (1 + ((p) & 0x3))