For VERIFY and WRITE AND VERIFY commands the size of the SCSI
Data-Out buffer can differ from the size of the data area on
the storage medium that is affected by the command. Make sure
that the Data-Out buffer size is computed correctly. Apparently
this part got dropped from my previous VERIFY / WRITE AND VERIFY
patch before I posted it due to rebasing.
Fixes: commit 0e2eb7d12eaa ("target: Fix VERIFY and WRITE VERIFY command parsing")
Signed-off-by: Bart Van Assche <bart.vanassche@xxxxxxxxxxx>
Cc: Hannes Reinecke <hare@xxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: Andy Grover <agrover@xxxxxxxxxx>
Cc: David Disseldorp <ddiss@xxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
---
drivers/target/target_core_sbc.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/target/target_core_sbc.c b/drivers/target/target_core_sbc.c
index a0ad618f1b1a..51489d96cb31 100644
--- a/drivers/target/target_core_sbc.c
+++ b/drivers/target/target_core_sbc.c
@@ -888,9 +888,10 @@ static sense_reason_t sbc_parse_verify(struct se_cmd *cmd, int *sectors,
sense_reason_t
sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops)
{
+ enum { INVALID_SIZE = 1 };
struct se_device *dev = cmd->se_dev;
unsigned char *cdb = cmd->t_task_cdb;
- unsigned int size;
+ unsigned int size = INVALID_SIZE;
u32 sectors = 0;
sense_reason_t ret;
@@ -1212,7 +1213,7 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops)
return TCM_ADDRESS_OUT_OF_RANGE;
}
- if (!(cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE))
+ if (size == INVALID_SIZE)
size = sbc_get_size(cmd, sectors);
}
--
2.12.2