[PATCH 135/142] USB: allow usbstorage to have LUNS greater than 2Tb
Greg Kroah-Hartman <[email protected]>
| Newsgroups | gmane.linux.usb.devel |
|---|---|
| Message-ID | <[email protected]> |
From: Richard Sharpe <[email protected]> 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 <[email protected]> Signed-off-by: Matthew Dharm <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- 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..3451e8d 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)); -- 1.5.3.4 ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel