Commit 9ac16b61 authored Mar 09, 2008 by FUJITA Tomonori Committed by James Bottomley Apr 07, 2008

[SCSI] scsi: add wrapper functions for sg buffer copy helper functions



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@lab.ntt.co.jp>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

parent b1adaf65

include/scsi/scsi_cmnd.h

+14 −0

Original line number	Diff line number	Diff line
		@@ -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 */