Merge r7404 from trunk

git-svn-id: http://svn.code.sf.net/p/scst/svn/branches/3.3.x@7661 d57e44dd-8a1f-0410-8b47-8ef2f437770f

scst/src/scst_lib.c

@@ -6862,6 +6862,21 @@ out:
 	return res;
 }
 
+/**
+ * scsi_execute - insert a SCSI request and wait for the result
+ * @sdev:	scsi device
+ * @cmd:	scsi command
+ * @data_direction: data direction
+ * @buffer:	data buffer
+ * @bufflen:	length of buffer - DMA_TO_DEVICE, DMA_FROM_DEVICE or DMA_NONE
+ * @sense:	optional sense buffer
+ * @timeout:	request timeout in seconds
+ * @retries:	number of times to retry request
+ * @flags:	flags for ->cmd_flags, e.g. REQ_FAILFAST_DEV
+ *
+ * Returns the scsi_cmnd result field if a command was executed, or a negative
+ * Linux error code if we didn't get that far.
+ */
 int scst_scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
 		      int data_direction, void *buffer, unsigned int bufflen,
 		      unsigned char *sense, int timeout, int retries, u64 flags)