centos man page for scsi_get_vpd_page

SCSI_GET_VPD_PAGE(9)						  SCSI mid layer					      SCSI_GET_VPD_PAGE(9)

NAME
       scsi_get_vpd_page - Get Vital Product Data from a SCSI device

SYNOPSIS
       int scsi_get_vpd_page(struct scsi_device * sdev, u8 page, unsigned char * buf, int buf_len);

ARGUMENTS
       sdev
	   The device to ask

       page
	   Which Vital Product Data to return

       buf
	   where to store the VPD

       buf_len
	   number of bytes in the VPD buffer area

DESCRIPTION
       SCSI devices may optionally supply Vital Product Data. Each 'page' of VPD is defined in the appropriate SCSI document (eg SPC, SBC). If the
       device supports this VPD page, this routine returns a pointer to a buffer containing the data from that page. The caller is responsible for
       calling kfree on this pointer when it is no longer needed. If we cannot retrieve the VPD page this routine returns NULL.

AUTHORS
       James Bottomley <James.Bottomley@hansenpartnership.com>
	   Author.

       Rob Landley <rob@landley.net>
	   Author.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						      SCSI_GET_VPD_PAGE(9)