diff options
| author | Yi Zou <yi.zou@intel.com> | 2009-10-21 16:27:12 -0700 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@suse.de> | 2009-12-04 12:00:27 -0600 |
| commit | 4347fa66878e079766258bc0d077c350cb31a799 (patch) | |
| tree | fce5fee754b75169e6983914a077a1732932ad75 | |
| parent | c340111dbb48482cd23f4e441deff9169be9bc6f (diff) | |
[SCSI] libfc: Fix wrong scsi return status under FC_DATA_UNDRUN
This bug is exposed when there is a link flap in LLD. Particularly, when it
happens right after a SCSI write command is sent out, no FCP_DATA is sent,
causing fsp->status_code to be set as FC_DATA_UNDRUN in fc_fcp_complete_locked
even no SCSI status is received. Consequently, fc_io_compl treats this as DID_OK.
This results in SCSI returning successful to the initial I/O request even
there is no DATA actually sent. Particularly, if you run an I/O tool w/ data
verification on, the read back for verification is gonna fail.
This is fixed here by checking when FC_DATA_UNDRUN happens, SCSI status is
received w/ FC_SRB_RCV_STATUS set in fsp->state.
Signed-off-by: Yi Zou <yi.zou@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
| -rw-r--r-- | drivers/scsi/libfc/fc_fcp.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/scsi/libfc/fc_fcp.c b/drivers/scsi/libfc/fc_fcp.c index ade962d74fb..40ed7442d9d 100644 --- a/drivers/scsi/libfc/fc_fcp.c +++ b/drivers/scsi/libfc/fc_fcp.c @@ -1849,7 +1849,8 @@ static void fc_io_compl(struct fc_fcp_pkt *fsp) * scsi status is good but transport level * underrun. */ - sc_cmd->result = DID_OK << 16; + sc_cmd->result = (fsp->state & FC_SRB_RCV_STATUS ? + DID_OK : DID_ERROR) << 16; } else { /* * scsi got underrun, this is an error |