From b54197c43db88f4436717f554d623189cddce29e Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 1 May 2014 16:51:50 +0200 Subject: virtio_scsi: use cmd_size Taken almost entirely from Nicholas Bellinger's scsi-mq conversion. Signed-off-by: Christoph Hellwig Acked-by: Paolo Bonzini Reviewed-by: Nicholas Bellinger --- include/scsi/scsi_cmnd.h | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'include/scsi') diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h index dd7c998221b3..e016e2ac38df 100644 --- a/include/scsi/scsi_cmnd.h +++ b/include/scsi/scsi_cmnd.h @@ -133,6 +133,15 @@ struct scsi_cmnd { unsigned char tag; /* SCSI-II queued command tag */ }; +/* + * Return the driver private allocation behind the command. + * Only works if cmd_size is set in the host template. + */ +static inline void *scsi_cmd_priv(struct scsi_cmnd *cmd) +{ + return cmd + 1; +} + /* make sure not to use it with REQ_TYPE_BLOCK_PC commands */ static inline struct scsi_driver *scsi_cmd_to_driver(struct scsi_cmnd *cmd) { -- cgit v1.2.3