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authorAlan Stern <stern@rowland.harvard.edu>2007-07-30 17:05:22 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2007-10-12 17:55:00 -0400
commitbdd016ba64d909329cb4bacacc8443901c00e112 (patch)
treecf20440d7d613377b5e2b4cec9764f2dc9e04928 /include/linux/usb.h
parent5b653c79c04c6b152b8dc7d18f8c8a7f77f4b235 (diff)
USB: add ep->enable
This patch (as944) adds an explicit "enabled" field to the usb_host_endpoint structure and uses it in place of the current mechanism. This is merely a time-space tradeoff; it makes checking whether URBs may be submitted to an endpoint simpler. The existing mechanism is efficient when converting urb->pipe to an endpoint pointer, but it's not so efficient when urb->ep is used instead. As a side effect, the procedure for enabling an endpoint is now a little more complicated. The ad-hoc inline code in usb.c and hub.c for enabling ep0 is now replaced with calls to usb_enable_endpoint, which is no longer static. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include/linux/usb.h')
-rw-r--r--include/linux/usb.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/usb.h b/include/linux/usb.h
index 105e3e9362d0..818a1b4f737a 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -52,6 +52,7 @@ struct ep_device;
52 * @ep_dev: ep_device for sysfs info 52 * @ep_dev: ep_device for sysfs info
53 * @extra: descriptors following this endpoint in the configuration 53 * @extra: descriptors following this endpoint in the configuration
54 * @extralen: how many bytes of "extra" are valid 54 * @extralen: how many bytes of "extra" are valid
55 * @enabled: URBs may be submitted to this endpoint
55 * 56 *
56 * USB requests are always queued to a given endpoint, identified by a 57 * USB requests are always queued to a given endpoint, identified by a
57 * descriptor within an active interface in a given USB configuration. 58 * descriptor within an active interface in a given USB configuration.
@@ -64,6 +65,7 @@ struct usb_host_endpoint {
64 65
65 unsigned char *extra; /* Extra descriptors */ 66 unsigned char *extra; /* Extra descriptors */
66 int extralen; 67 int extralen;
68 int enabled;
67}; 69};
68 70
69/* host-side wrapper for one interface setting's parsed descriptors */ 71/* host-side wrapper for one interface setting's parsed descriptors */