ethtool: Expand documentation of struct ethtool_regs

	__u32	data;

};

/* for passing big chunks of data */

/**

 * struct ethtool_regs - hardware register dump

 * @cmd: Command number = %ETHTOOL_GREGS

 * @version: Dump format version.  This is driver-specific and may

 *	distinguish different chips/revisions.  Drivers must use new

 *	version numbers whenever the dump format changes in an

 *	incompatible way.

 * @len: On entry, the real length of @data.  On return, the number of

 *	bytes used.

 * @data: Buffer for the register dump

 *

 * Users should use %ETHTOOL_GDRVINFO to find the maximum length of

 * a register dump for the interface.  They must allocate the buffer

 * immediately following this structure.

 */

struct ethtool_regs {

	__u32	cmd;

	__u32	version; /* driver-specific, indicates different chips/revs */

	__u32	len; /* bytes */

	__u32	version;

	__u32	len;

	__u8	data[0];

};