When setting the FCP timeout we need to ensure a lower boundary
for E_D_TOV and R_A_TOV, otherwise we'd be getting spurious I/O
issues due to the fcp timer firing too early.
Signed-off-by: Hannes Reinecke <h...@suse.com>
---
drivers/scsi/libfc/fc_fcp.c | 9 +++++----
drivers/scsi/libfc/fc_lport.c | 8 +++++---
drivers/scsi/libfc/fc_rport.c | 6 ++++--
3 files changed, 14 insertions(+), 9 deletions(-)
diff --git a/drivers/scsi/libfc/fc_fcp.c b/drivers/scsi/libfc/fc_fcp.c
index 9f9eb7b..10faca2 100644
--- a/drivers/scsi/libfc/fc_fcp.c
+++ b/drivers/scsi/libfc/fc_fcp.c
@@ -1137,8 +1137,11 @@ static int fc_fcp_pkt_send(struct fc_lport *lport,
struct fc_fcp_pkt *fsp)
static inline unsigned int get_fsp_rec_tov(struct fc_fcp_pkt *fsp)
{
struct fc_rport_libfc_priv *rpriv = fsp->rport->dd_data;
+ unsigned int e_d_tov = FC_DEF_E_D_TOV;
- return msecs_to_jiffies(rpriv->e_d_tov) + HZ;
+ if (rpriv && rpriv->e_d_tov > e_d_tov)
+ e_d_tov = rpriv->e_d_tov;
+ return msecs_to_jiffies(e_d_tov) + HZ;
}
/**
@@ -1693,7 +1696,6 @@ static void fc_fcp_srr(struct fc_fcp_pkt *fsp, enum
fc_rctl r_ctl, u32 offset)
struct fc_seq *seq;
struct fcp_srr *srr;
struct fc_frame *fp;
- unsigned int rec_tov;
rport = fsp->rport;
rpriv = rport->dd_data;
@@ -1717,10 +1719,9 @@ static void fc_fcp_srr(struct fc_fcp_pkt *fsp, enum
fc_rctl r_ctl, u32 offset)
rpriv->local_port->port_id, FC_TYPE_FCP,
FC_FCTL_REQ, 0);
- rec_tov = get_fsp_rec_tov(fsp);
seq = lport->tt.exch_seq_send(lport, fp, fc_fcp_srr_resp,
fc_fcp_pkt_destroy,
- fsp, jiffies_to_msecs(rec_tov));
+ fsp, get_fsp_rec_tov(fsp));
if (!seq)
goto retry;
diff --git a/drivers/scsi/libfc/fc_lport.c b/drivers/scsi/libfc/fc_lport.c
index 4e11c90..81ad8ac 100644
--- a/drivers/scsi/libfc/fc_lport.c
+++ b/drivers/scsi/libfc/fc_lport.c
@@ -1777,7 +1777,7 @@ void fc_lport_flogi_resp(struct fc_seq *sp, struct
fc_frame *fp,
if ((csp_flags & FC_SP_FT_FPORT) == 0) {
if (e_d_tov > lport->e_d_tov)
lport->e_d_tov = e_d_tov;
- lport->r_a_tov = 2 * e_d_tov;
+ lport->r_a_tov = 2 * lport->e_d_tov;
fc_lport_set_port_id(lport, did, fp);
printk(KERN_INFO "host%d: libfc: "
"Port (%6.6x) entered "
@@ -1789,8 +1789,10 @@ void fc_lport_flogi_resp(struct fc_seq *sp, struct
fc_frame *fp,
get_unaligned_be64(
&flp->fl_wwnn));
} else {
- lport->e_d_tov = e_d_tov;
- lport->r_a_tov = r_a_tov;
+ if (e_d_tov > lport->e_d_tov)
+ lport->e_d_tov = e_d_tov;
+ if (r_a_tov > lport->r_a_tov)
+ lport->r_a_tov = r_a_tov;
fc_host_fabric_name(lport->host) =
get_unaligned_be64(&flp->fl_wwnn);
fc_lport_set_port_id(lport, did, fp);
diff --git a/drivers/scsi/libfc/fc_rport.c b/drivers/scsi/libfc/fc_rport.c
index bb7e9d9..3d2baba 100644
--- a/drivers/scsi/libfc/fc_rport.c
+++ b/drivers/scsi/libfc/fc_rport.c
@@ -1296,13 +1296,15 @@ static void fc_rport_rtv_resp(struct fc_seq *sp, struct
fc_frame *fp,
tov = ntohl(rtv->rtv_r_a_tov);
if (tov == 0)
tov = 1;
- rdata->r_a_tov = tov;
+ if (tov > rdata->r_a_tov)
+ rdata->r_a_tov = tov;
tov = ntohl(rtv->rtv_e_d_tov);
if (toq & FC_ELS_RTV_EDRES)
tov /= 1000000;
if (tov == 0)
tov = 1;
- rdata->e_d_tov = tov;
+ if (tov > rdata->e_d_tov)
+ rdata->e_d_tov = tov;
}
}
--
1.8.5.6
--
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
