lkml.org 
[lkml]   [2017]   [Nov]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 2/7] scsi: bfa: use proper time accessor for stats_reset_time
Date
We use the deprecated do_gettimeofday() function to read the
current time when resetting the statistics in both bfa_port
and bfa_svc. This works fine because overflow is handled
correctly, but we want to get rid of do_gettimeofday() and
using a non-monotonic time suffers from concurrent
settimeofday calls and other problems.

This uses the ktime_get_seconds() function instead, which
does what we need here.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
drivers/scsi/bfa/bfa_port.c | 15 +++------------
drivers/scsi/bfa/bfa_port.h | 2 +-
drivers/scsi/bfa/bfa_svc.c | 15 ++++-----------
drivers/scsi/bfa/bfa_svc.h | 2 +-
4 files changed, 9 insertions(+), 25 deletions(-)

diff --git a/drivers/scsi/bfa/bfa_port.c b/drivers/scsi/bfa/bfa_port.c
index da1721e0d167..079bc77f4102 100644
--- a/drivers/scsi/bfa/bfa_port.c
+++ b/drivers/scsi/bfa/bfa_port.c
@@ -96,14 +96,11 @@ bfa_port_get_stats_isr(struct bfa_port_s *port, bfa_status_t status)
port->stats_busy = BFA_FALSE;

if (status == BFA_STATUS_OK) {
- struct timeval tv;
-
memcpy(port->stats, port->stats_dma.kva,
sizeof(union bfa_port_stats_u));
bfa_port_stats_swap(port, port->stats);

- do_gettimeofday(&tv);
- port->stats->fc.secs_reset = tv.tv_sec - port->stats_reset_time;
+ port->stats->fc.secs_reset = ktime_get_seconds() - port->stats_reset_time;
}

if (port->stats_cbfn) {
@@ -124,16 +121,13 @@ bfa_port_get_stats_isr(struct bfa_port_s *port, bfa_status_t status)
static void
bfa_port_clear_stats_isr(struct bfa_port_s *port, bfa_status_t status)
{
- struct timeval tv;
-
port->stats_status = status;
port->stats_busy = BFA_FALSE;

/*
* re-initialize time stamp for stats reset
*/
- do_gettimeofday(&tv);
- port->stats_reset_time = tv.tv_sec;
+ port->stats_reset_time = ktime_get_seconds();

if (port->stats_cbfn) {
port->stats_cbfn(port->stats_cbarg, status);
@@ -471,8 +465,6 @@ void
bfa_port_attach(struct bfa_port_s *port, struct bfa_ioc_s *ioc,
void *dev, struct bfa_trc_mod_s *trcmod)
{
- struct timeval tv;
-
WARN_ON(!port);

port->dev = dev;
@@ -494,8 +486,7 @@ bfa_port_attach(struct bfa_port_s *port, struct bfa_ioc_s *ioc,
/*
* initialize time stamp for stats reset
*/
- do_gettimeofday(&tv);
- port->stats_reset_time = tv.tv_sec;
+ port->stats_reset_time = ktime_get_seconds();

bfa_trc(port, 0);
}
diff --git a/drivers/scsi/bfa/bfa_port.h b/drivers/scsi/bfa/bfa_port.h
index 26dc1bf14c85..0c3b200243ca 100644
--- a/drivers/scsi/bfa/bfa_port.h
+++ b/drivers/scsi/bfa/bfa_port.h
@@ -36,7 +36,7 @@ struct bfa_port_s {
bfa_port_stats_cbfn_t stats_cbfn;
void *stats_cbarg;
bfa_status_t stats_status;
- u32 stats_reset_time;
+ time64_t stats_reset_time;
union bfa_port_stats_u *stats;
struct bfa_dma_s stats_dma;
bfa_boolean_t endis_pending;
diff --git a/drivers/scsi/bfa/bfa_svc.c b/drivers/scsi/bfa/bfa_svc.c
index e640223bab3c..dd7d1e6bc2d8 100644
--- a/drivers/scsi/bfa/bfa_svc.c
+++ b/drivers/scsi/bfa/bfa_svc.c
@@ -3047,7 +3047,6 @@ bfa_fcport_attach(struct bfa_s *bfa, void *bfad, struct bfa_iocfc_cfg_s *cfg,
struct bfa_fcport_s *fcport = BFA_FCPORT_MOD(bfa);
struct bfa_port_cfg_s *port_cfg = &fcport->cfg;
struct bfa_fcport_ln_s *ln = &fcport->ln;
- struct timeval tv;

fcport->bfa = bfa;
ln->fcport = fcport;
@@ -3060,8 +3059,7 @@ bfa_fcport_attach(struct bfa_s *bfa, void *bfad, struct bfa_iocfc_cfg_s *cfg,
/*
* initialize time stamp for stats reset
*/
- do_gettimeofday(&tv);
- fcport->stats_reset_time = tv.tv_sec;
+ fcport->stats_reset_time = ktime_get_seconds();
fcport->stats_dma_ready = BFA_FALSE;

/*
@@ -3295,9 +3293,7 @@ __bfa_cb_fcport_stats_get(void *cbarg, bfa_boolean_t complete)
union bfa_fcport_stats_u *ret;

if (complete) {
- struct timeval tv;
- if (fcport->stats_status == BFA_STATUS_OK)
- do_gettimeofday(&tv);
+ time64_t time = ktime_get_seconds();

list_for_each_safe(qe, qen, &fcport->stats_pending_q) {
bfa_q_deq(&fcport->stats_pending_q, &qe);
@@ -3312,7 +3308,7 @@ __bfa_cb_fcport_stats_get(void *cbarg, bfa_boolean_t complete)
bfa_fcport_fcoe_stats_swap(&ret->fcoe,
&fcport->stats->fcoe);
ret->fcoe.secs_reset =
- tv.tv_sec - fcport->stats_reset_time;
+ time - fcport->stats_reset_time;
}
}
bfa_cb_queue_status(fcport->bfa, &cb->hcb_qe,
@@ -3373,13 +3369,10 @@ __bfa_cb_fcport_stats_clr(void *cbarg, bfa_boolean_t complete)
struct list_head *qe, *qen;

if (complete) {
- struct timeval tv;
-
/*
* re-initialize time stamp for stats reset
*/
- do_gettimeofday(&tv);
- fcport->stats_reset_time = tv.tv_sec;
+ fcport->stats_reset_time = ktime_get_seconds();
list_for_each_safe(qe, qen, &fcport->statsclr_pending_q) {
bfa_q_deq(&fcport->statsclr_pending_q, &qe);
cb = (struct bfa_cb_pending_q_s *)qe;
diff --git a/drivers/scsi/bfa/bfa_svc.h b/drivers/scsi/bfa/bfa_svc.h
index ea2278bc78a8..7e8fb6231d49 100644
--- a/drivers/scsi/bfa/bfa_svc.h
+++ b/drivers/scsi/bfa/bfa_svc.h
@@ -505,7 +505,7 @@ struct bfa_fcport_s {
struct list_head stats_pending_q;
struct list_head statsclr_pending_q;
bfa_boolean_t stats_qfull;
- u32 stats_reset_time; /* stats reset time stamp */
+ time64_t stats_reset_time; /* stats reset time stamp */
bfa_boolean_t diag_busy; /* diag busy status */
bfa_boolean_t beacon; /* port beacon status */
bfa_boolean_t link_e2e_beacon; /* link beacon status */
--
2.9.0
\
 
 \ /
  Last update: 2017-11-10 16:40    [W:0.085 / U:1.724 seconds]
©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site