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| author | Richard Sharpe <rsharpe@richardsharpe.com> | 2007-10-10 10:56:28 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-10-12 14:55:33 -0700 |
| commit | 17f060224fb9f435c6f9306b7b61419d038def13 (patch) | |
| tree | 9ea83420b7b7b4143977efc2c303e94a7dde61f7 | |
| parent | eecfb911a03a48ef5f7114246343128bd01c1b5f (diff) | |
| download | op-kernel-dev-17f060224fb9f435c6f9306b7b61419d038def13.zip op-kernel-dev-17f060224fb9f435c6f9306b7b61419d038def13.tar.gz | |
USB: allow usbstorage to have LUNS greater than 2Tb
Attached is a very small patch (several comment lines) and a one-line
coded change) that allows for USB storage devices that are larger than
2TB.
At the company where I work we need such support, and one of my
co-workers, Jane Liu, pointed out that SCSI low-layer drivers need to
specify what size CDBs they accept. After looking through the code it
became obvious that the current USB Storage code accepted the default of
12-byte CDBs, so I changed it to accept 16-byte CDBs. This allows our
device to work.
Signed-off-by: Richard Sharpe <rsharpe@richardsharpe.com>
Signed-off-by: Matthew Dharm <mdharm-usb@one-eyed-alien.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/usb/storage/usb.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/usb/storage/usb.c b/drivers/usb/storage/usb.c index 5918166..3451e8d0 100644 --- a/drivers/usb/storage/usb.c +++ b/drivers/usb/storage/usb.c @@ -960,6 +960,10 @@ static int storage_probe(struct usb_interface *intf, return -ENOMEM; } + /* + * Allow 16-byte CDBs and thus > 2TB + */ + host->max_cmd_len = 16; us = host_to_us(host); memset(us, 0, sizeof(struct us_data)); mutex_init(&(us->dev_mutex)); |
