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| author | David Vrabel <david.vrabel@csr.com> | 2009-08-24 14:44:30 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-12-11 11:55:14 -0800 |
| commit | 4c1bd3d7a7d114dabd58f62f386ac4bfd268be1f (patch) | |
| tree | 1c8d7d6df693c71ac0b3dcc4124498d91c939f2d /include/linux/usb.h | |
| parent | 09ce497e79a930ac4912d6bc295baab82b39f8ab (diff) | |
| download | linux-4c1bd3d7a7d114dabd58f62f386ac4bfd268be1f.tar.gz linux-4c1bd3d7a7d114dabd58f62f386ac4bfd268be1f.tar.bz2 linux-4c1bd3d7a7d114dabd58f62f386ac4bfd268be1f.zip | |
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.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/usb.h b/include/linux/usb.h index a34fa89f1474..6e91ee4f5b81 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 */ |