• Matt Wang's avatar
    scsi: vmw_pvscsi: Set correct residual data length · e662502b
    Matt Wang authored
    Some commands (such as INQUIRY) may return less data than the initiator
    requested. To avoid conducting useless information, set the right residual
    count to make upper layer aware of this.
    
    Before (INQUIRY PAGE 0xB0 with 128B buffer):
    
    $ sg_raw -r 128 /dev/sda 12 01 B0 00 80 00
    SCSI Status: Good
    
    Received 128 bytes of data:
     00 00 b0 00 3c 01 00 00 00 00 00 00 00 00 00 00 00 ...<............
     10 00 00 00 00 00 01 00 00 00 00 00 40 00 00 08 00 ...........@....
     20 80 00 00 00 00 00 00 00 00 00 20 00 00 00 00 00 .......... .....
     30 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
     40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
     50 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
     60 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
     70 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
    
    After:
    
    $ sg_raw -r 128 /dev/sda 12 01 B0 00 80 00
    SCSI Status: Good
    
    Received 64 bytes of data:
    00 00 b0 00 3c 01 00 00 00 00 00 00 00 00 00 00 00 ...<............
    10 00 00 00 00 00 01 00 00 00 00 00 40 00 00 08 00 ...........@....
    20 80 00 00 00 00 00 00 00 00 00 20 00 00 00 00 00 .......... .....
    30 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
    
    [mkp: clarified description]
    
    Link: https://lore.kernel.org/r/03C41093-B62E-43A2-913E-CFC92F1C70C3@vmware.com
    
    Signed-off-by: default avatarMatt Wang <wwentao@vmware.com>
    Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
    e662502b
vmw_pvscsi.c 43.3 KB