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authorMartin K. Petersen <martin.petersen@oracle.com>2009-01-04 03:04:34 -0500
committerJames Bottomley <James.Bottomley@HansenPartnership.com>2009-01-05 09:06:23 -0600
commit5db524bd469290212781e1cb0293b57a7a1c000a (patch)
tree04f26ae6eaab0507efba49a5a30b43e29149b0b6 /drivers/scsi
parentbecce74b8231f8b5e51165e797f6c950d1dbcf67 (diff)
[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')
-rw-r--r--drivers/scsi/sd_dif.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/scsi/sd_dif.c b/drivers/scsi/sd_dif.c
index c9b41077fca..184dff49279 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: