diff options
| author | Martin K. Petersen <martin.petersen@oracle.com> | 2009-01-04 03:04:34 -0500 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@HansenPartnership.com> | 2009-01-05 09:06:23 -0600 |
| commit | 5db524bd469290212781e1cb0293b57a7a1c000a (patch) | |
| tree | 04f26ae6eaab0507efba49a5a30b43e29149b0b6 /drivers/scsi/sd_dif.c | |
| parent | becce74b8231f8b5e51165e797f6c950d1dbcf67 (diff) | |
| download | linux-5db524bd469290212781e1cb0293b57a7a1c000a.tar.bz2 | |
[SCSI] sd: Correctly handle 6-byte commands with DIX
DIF does not work with 6-byte commands so we previously ignored those
commands when preparing a request. However, DIX does not need
RDPROTECT/WRPROTECT to be set and 6-byte commands are consequently
perfectly valid in host-only mode.
This patch fixes a problem where we would set the wrong DIX operation
when issuing commands to a legacy disk.
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'drivers/scsi/sd_dif.c')
| -rw-r--r-- | drivers/scsi/sd_dif.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/scsi/sd_dif.c b/drivers/scsi/sd_dif.c index c9b41077fca1..184dff492797 100644 --- a/drivers/scsi/sd_dif.c +++ b/drivers/scsi/sd_dif.c @@ -374,7 +374,10 @@ void sd_dif_op(struct scsi_cmnd *scmd, unsigned int dif, unsigned int dix, unsig else csum_convert = 0; + BUG_ON(dif && (scmd->cmnd[0] == READ_6 || scmd->cmnd[0] == WRITE_6)); + switch (scmd->cmnd[0]) { + case READ_6: case READ_10: case READ_12: case READ_16: @@ -390,6 +393,7 @@ void sd_dif_op(struct scsi_cmnd *scmd, unsigned int dif, unsigned int dix, unsig break; + case WRITE_6: case WRITE_10: case WRITE_12: case WRITE_16: |