LLDs need to copies data between the SG table in struct scsi_cmnd and
liner buffer. So they use the helper functions like
sg_copy_from_buffer(scsi_sglist(sc), scsi_sg_count(sc), buf, buflen)
sg_copy_to_buffer(scsi_sglist(sc), scsi_sg_count(sc), buf, buflen)
This patch just adds wrapper functions:
scsi_sg_copy_from_buffer(sc, buf, buflen)
scsi_sg_copy_to_buffer(sc, buf, buflen)
Signed-off-by: FUJITA Tomonori <fujita.tomonori@xxxxxxxxxxxxx>
Cc: James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx>
---
include/scsi/scsi_cmnd.h | 14 ++++++++++++++
1 files changed, 14 insertions(+), 0 deletions(-)
diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h
index de28aab..b260be6 100644
--- a/include/scsi/scsi_cmnd.h
+++ b/include/scsi/scsi_cmnd.h
@@ -175,4 +175,18 @@ static inline struct scsi_data_buffer *scsi_out(struct scsi_cmnd *cmd)
return &cmd->sdb;
}
+static inline int scsi_sg_copy_from_buffer(struct scsi_cmnd *cmd,
+ void *buf, int buflen)
+{
+ return sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
+ buf, buflen);
+}
+
+static inline int scsi_sg_copy_to_buffer(struct scsi_cmnd *cmd,
+ void *buf, int buflen)
+{
+ return sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
+ buf, buflen);
+}
+
#endif /* _SCSI_SCSI_CMND_H */
--
1.5.3.7
--
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