| Message ID | 20190529132901.27645-6-hare@suse.de (mailing list archive) |
|---|---|
| State | Changes Requested |
| Headers | show |
| Series | scsi: enable reserved commands for LLDDs | expand |
On 5/29/19 6:28 AM, Hannes Reinecke wrote: > Add a command to retrieve the scsi_cmnd structure from the driver ^^^^^^^ function? > private allocation data.
On 5/29/19 5:14 PM, Bart Van Assche wrote: > On 5/29/19 6:28 AM, Hannes Reinecke wrote: >> Add a command to retrieve the scsi_cmnd structure from the driver > ^^^^^^^ > function? >> private allocation data. Sure. Cheers, Hannes
diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h index 76ed5e4acd38..318f1e729318 100644 --- a/include/scsi/scsi_cmnd.h +++ b/include/scsi/scsi_cmnd.h @@ -151,6 +151,16 @@ static inline void *scsi_cmd_priv(struct scsi_cmnd *cmd) return cmd + 1; } +/* + * Return the scsi_cmnd structure located before the driver + * private allocation. Only works if cmd_size is set in the + * host template. + */ +static inline struct scsi_cmnd *scsi_cmd_from_priv(void *priv) +{ + return priv - sizeof(struct scsi_cmnd); +} + /* make sure not to use it with passthrough commands */ static inline struct scsi_driver *scsi_cmd_to_driver(struct scsi_cmnd *cmd) {
Add a command to retrieve the scsi_cmnd structure from the driver private allocation data. Signed-off-by: Hannes Reinecke <hare@suse.com> --- include/scsi/scsi_cmnd.h | 10 ++++++++++ 1 file changed, 10 insertions(+)