RE: [Open-FCoE] [PATCH] scsi: fix Wunused-but-set-variable buildwarning

From: Prasad Gondi
Date: Thu May 14 2015 - 19:24:55 EST

It seems like rpriv is used to set the fsp->tgt_flags originally

> fsp->tgt_flags = rpriv->flags

And fsp->tgt_flags are used in "fc_fcp_cmd_send" like this

setup_timer(&fsp->timer, fc_fcp_timeout, (unsigned long)fsp);
if (rpriv->flags & FC_RP_FLAGS_REC_SUPPORTED)
fc_fcp_timer_set(fsp, get_fsp_rec_tov(fsp));

Main purpose of this flags used is to set the correct TimeOut Value for fc_fcp_timer.

So is the removal of the "fsp->tgt_flags = rpriv->flags" in fc_queuecommand() is intentional? Or by mistake?

Once we clear that out we can see whether this change make sense?

Prasad Gondi

-----Original Message-----
From: fcoe-devel [mailto:fcoe-devel-bounces@xxxxxxxxxxxxx] On Behalf Of Nicholas Mc Guire
Sent: Thursday, May 14, 2015 11:13 AM
To: Vasu Dev
Cc: fcoe-devel@xxxxxxxxxxxxx; James E.J. Bottomley; linux-kernel@xxxxxxxxxxxxxxx; linux-scsi@xxxxxxxxxxxxxxx; Nicholas Mc Guire
Subject: [Open-FCoE] [PATCH] scsi: fix Wunused-but-set-variable buildwarning

commit "[SCSI] libfc: remove tgt_flags from fc_fcp_pkt struct"
removed the last usage of rpriv (rpriv->flags) but forgot to remove the unused rpriv struct resulting in:
drivers/scsi/libfc/fc_fcp.c: In function 'fc_queuecommand':
drivers/scsi/libfc/fc_fcp.c:1795:30: warning: variable 'rpriv' set
but not used [-Wunused-but-set-variable] so simply drop its declaration and setting.

Patch was compile tested with x86_64_defconfig + SCSI_LOWLEVEL=y, CONFIG_SCSI_FC_ATTRS=m, CONFIG_LIBFC=m

Patch is against 4.1-rc3 (localversion-next is -next-20150514)

Signed-off-by: Nicholas Mc Guire <hofrat@xxxxxxxxx>

drivers/scsi/libfc/fc_fcp.c | 3 ---
1 file changed, 3 deletions(-)

diff --git a/drivers/scsi/libfc/fc_fcp.c b/drivers/scsi/libfc/fc_fcp.c index c438b81..fee6928 100644
--- a/drivers/scsi/libfc/fc_fcp.c
+++ b/drivers/scsi/libfc/fc_fcp.c
@@ -1792,7 +1792,6 @@ int fc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *sc_cmd)
struct fc_lport *lport = shost_priv(shost);
struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));
struct fc_fcp_pkt *fsp;
- struct fc_rport_libfc_priv *rpriv;
int rval;
int rc = 0;
struct fc_stats *stats;
@@ -1814,8 +1813,6 @@ int fc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *sc_cmd)
goto out;

- rpriv = rport->dd_data;
if (!fc_fcp_lport_queue_ready(lport)) {
if (lport->qfull)

fcoe-devel mailing list
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at