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authorDavid Vrabel <david.vrabel@csr.com>2009-08-24 14:44:30 +0100
committerGreg Kroah-Hartman <gregkh@suse.de>2009-12-11 11:55:14 -0800
commit4c1bd3d7a7d114dabd58f62f386ac4bfd268be1f (patch)
tree1c8d7d6df693c71ac0b3dcc4124498d91c939f2d /include/linux/usb.h
parent09ce497e79a930ac4912d6bc295baab82b39f8ab (diff)
USB: make urb scatter-gather support more generic
The WHCI HCD will also support urbs with scatter-gather lists. Add a usb_bus field to indicated how many sg list elements are supported by the HCD. Use this to decide whether to pass the scatter-list to the HCD or not. Make the usb-storage driver use this new field. Signed-off-by: David Vrabel <david.vrabel@csr.com> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: Matthew Dharm <mdharm-usb@one-eyed-alien.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include/linux/usb.h')
-rw-r--r--include/linux/usb.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/usb.h b/include/linux/usb.h
index a34fa89f147..6e91ee4f5b8 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -331,6 +331,7 @@ struct usb_bus {
u8 otg_port; /* 0, or number of OTG/HNP port */
unsigned is_b_host:1; /* true during some HNP roleswitches */
unsigned b_hnp_enable:1; /* OTG: did A-Host enable HNP? */
+ unsigned sg_tablesize; /* 0 or largest number of sg list entries */
int devnum_next; /* Next open device number in
* round-robin allocation */