[SCSI] libfc: fix slowpath error from WARN_ON in fc_fcp_send_data

This is exposed by a mpio test using EMC CLARiiON targets when LUN
tresspassing happens, the burst length from the XFER_READY for the
MODE SELECT(10) is 19 bytes, much smaller than FC_MIN_MAX_PAYLOAD as
256 bytes. This patch removes the related two WARN_ON()s.

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>

diff --git a/drivers/scsi/libfc/fc_fcp.c b/drivers/scsi/libfc/fc_fcp.c
index 8914f1e95b72d2e990409861bbec0896306ffc9a..a0a3ae7d86113c204d77a5fa81c197c3d3639328 100644 (file)
--- a/drivers/scsi/libfc/fc_fcp.c
+++ b/drivers/scsi/libfc/fc_fcp.c
@@ -580,10 +580,8 @@ static int fc_fcp_send_data(struct fc_fcp_pkt *fsp, struct fc_seq *seq,
                           fsp, seq_blen, lport->lso_max, t_blen);
        }
 
-       WARN_ON(t_blen < FC_MIN_MAX_PAYLOAD);
        if (t_blen > 512)
                t_blen &= ~(512 - 1);   /* round down to block size */
-       WARN_ON(t_blen < FC_MIN_MAX_PAYLOAD);   /* won't go below 256 */
        sc = fsp->cmd;
 
        remaining = seq_blen;