From db4742dd8f0aa9125b74f9b2516336a75f3d9106 Mon Sep 17 00:00:00 2001 From: Boaz Harrosh Date: Wed, 30 Apr 2008 11:27:26 +0300 Subject: [SCSI] add support for variable length extended commands Add support for variable-length, extended, and vendor specific CDBs to scsi-ml. It is now possible for initiators and ULD's to issue these types of commands. LLDs need not change much. All they need is to raise the .max_cmd_len to the longest command they support (see iscsi patch). - clean-up some code paths that did not expect commands to be larger than 16, and change cmd_len members' type to short as char is not enough. Signed-off-by: Boaz Harrosh Signed-off-by: Benny Halevy Signed-off-by: James Bottomley --- include/scsi/scsi_host.h | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) (limited to 'include/scsi/scsi_host.h') diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h index d967d6dc7a2..1834fdfe82a 100644 --- a/include/scsi/scsi_host.h +++ b/include/scsi/scsi_host.h @@ -573,13 +573,11 @@ struct Scsi_Host { /* * The maximum length of SCSI commands that this host can accept. * Probably 12 for most host adapters, but could be 16 for others. + * or 260 if the driver supports variable length cdbs. * For drivers that don't set this field, a value of 12 is - * assumed. I am leaving this as a number rather than a bit - * because you never know what subsequent SCSI standards might do - * (i.e. could there be a 20 byte or a 24-byte command a few years - * down the road?). + * assumed. */ - unsigned char max_cmd_len; + unsigned short max_cmd_len; int this_id; int can_queue; -- cgit v1.2.3-18-g5258