X-Git-Url: https://git.kernelconcepts.de/?a=blobdiff_plain;f=include%2Fscsi%2Fscsi_cmnd.h;h=e0ae71098144ac9511f5ba315102e74e1d4e0516;hb=67b9d76f9e2f9f87f94a11521cc996dc2e43ce14;hp=e016e2ac38df8f6c570980a4624e9ccaefd0dd5e;hpb=e64d4687730cf47bd0c59e9ed76b52ca0c0f44c0;p=karo-tx-linux.git

diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h
index e016e2ac38df..e0ae71098144 100644
--- a/include/scsi/scsi_cmnd.h
+++ b/include/scsi/scsi_cmnd.h
@@ -7,6 +7,7 @@
 #include <linux/types.h>
 #include <linux/timer.h>
 #include <linux/scatterlist.h>
+#include <scsi/scsi_device.h>
 
 struct Scsi_Host;
 struct scsi_device;
@@ -315,4 +316,20 @@ static inline void set_driver_byte(struct scsi_cmnd *cmd, char status)
 	cmd->result = (cmd->result & 0x00ffffff) | (status << 24);
 }
 
+static inline unsigned scsi_transfer_length(struct scsi_cmnd *scmd)
+{
+	unsigned int xfer_len = scsi_out(scmd)->length;
+	unsigned int prot_op = scsi_get_prot_op(scmd);
+	unsigned int sector_size = scmd->device->sector_size;
+
+	switch (prot_op) {
+	case SCSI_PROT_NORMAL:
+	case SCSI_PROT_WRITE_STRIP:
+	case SCSI_PROT_READ_INSERT:
+		return xfer_len;
+	}
+
+	return xfer_len + (xfer_len >> ilog2(sector_size)) * 8;
+}
+
 #endif /* _SCSI_SCSI_CMND_H */