scsi_get_vpd_page — Get Vital Product Data from a SCSI device
int scsi_get_vpd_page ( | struct scsi_device * sdev, |
| u8 page, | |
| unsigned char * buf, | |
int buf_len); |
sdevThe device to ask
pageWhich Vital Product Data to return
bufwhere to store the VPD
buf_lennumber of bytes in the VPD buffer area
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.