Merging upstream version 2.4.

Signed-off-by: Daniel Baumann <daniel@debian.org>

Documentation/nvme-get-log.txt

@@ -19,6 +19,7 @@ SYNOPSIS
 	      [--rae | -r]
 	      [--csi=<command_set_identifier> | -y <command_set_identifier>]
 	      [--ot=<offset_type> | -O <offset_type>]
+		    [--xfer-len=<length> | -x <length>]
 
 DESCRIPTION
 -----------
@@ -95,6 +96,11 @@ OPTIONS
 	The default is byte offset. If the option is specified
 	the index mode is used.
 
+-x <length>::
+--xfer-len <length>:
+	Specify the read chunk size. The length argument is expected to be
+	a multiple of 4096. The default size is 4096.
+
 EXAMPLES
 --------
 * Get 512 bytes from log page 2