diff options
Diffstat (limited to 'include/scsi/sg.h')
| -rw-r--r-- | include/scsi/sg.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/scsi/sg.h b/include/scsi/sg.h index e1a42c2409cc..d5c17775c3b4 100644 --- a/include/scsi/sg.h +++ b/include/scsi/sg.h @@ -131,6 +131,17 @@ struct compat_sg_io_hdr { #define SG_INFO_DIRECT_IO 0x2 /* direct IO requested and performed */ #define SG_INFO_MIXED_IO 0x4 /* part direct, part indirect IO */ +/* + * Obsolete DRIVER_SENSE driver byte + * + * Originally the SCSI midlayer would set the DRIVER_SENSE driver byte when + * a sense code was generated and a sense buffer was allocated. + * However, as nowadays every scsi command has a sense code allocated this + * distinction became moot as one could check the sense buffer directly. + * Consequently this byte is not set anymore from the midlayer, but SG will + * keep setting this byte to be compatible with previous releases. + */ +#define DRIVER_SENSE 0x08 typedef struct sg_scsi_id { /* used by SG_GET_SCSI_ID ioctl() */ int host_no; /* as in "scsi<n>" where 'n' is one of 0, 1, 2 etc */ |