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Subject[PATCH 5/7] scsi: bfa: replace bfa_get_log_time() with ktime_get_real_seconds()
Date
The bfa_get_log_time() returns a 64-bit timestamp that does not
suffer from the y2038 overflow on 64-bit systems. However, on 32-bit
architectures the timestamp will jump from 0x000000007fffffff
to 0xffffffff80000000 in y2038 and produce wrong results.

The ktime_get_real_seconds() function does the same thing as
bfa_get_log_time() without that problem, so we can simply remove
the former use ktime_get_real_seconds() instead.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
drivers/scsi/bfa/bfa_svc.c | 32 ++++++++++----------------------
1 file changed, 10 insertions(+), 22 deletions(-)

diff --git a/drivers/scsi/bfa/bfa_svc.c b/drivers/scsi/bfa/bfa_svc.c
index dd7d1e6bc2d8..9d20d2c92e8c 100644
--- a/drivers/scsi/bfa/bfa_svc.c
+++ b/drivers/scsi/bfa/bfa_svc.c
@@ -288,18 +288,6 @@ plkd_validate_logrec(struct bfa_plog_rec_s *pl_rec)
return 0;
}

-static u64
-bfa_get_log_time(void)
-{
- u64 system_time = 0;
- struct timeval tv;
- do_gettimeofday(&tv);
-
- /* We are interested in seconds only. */
- system_time = tv.tv_sec;
- return system_time;
-}
-
static void
bfa_plog_add(struct bfa_plog_s *plog, struct bfa_plog_rec_s *pl_rec)
{
@@ -320,7 +308,7 @@ bfa_plog_add(struct bfa_plog_s *plog, struct bfa_plog_rec_s *pl_rec)

memcpy(pl_recp, pl_rec, sizeof(struct bfa_plog_rec_s));

- pl_recp->tv = bfa_get_log_time();
+ pl_recp->tv = ktime_get_real_seconds();
BFA_PL_LOG_REC_INCR(plog->tail);

if (plog->head == plog->tail)
@@ -6141,13 +6129,13 @@ bfa_fcdiag_lb_is_running(struct bfa_s *bfa)
/*
* D-port
*/
-#define bfa_dport_result_start(__dport, __mode) do { \
- (__dport)->result.start_time = bfa_get_log_time(); \
- (__dport)->result.status = DPORT_TEST_ST_INPRG; \
- (__dport)->result.mode = (__mode); \
- (__dport)->result.rp_pwwn = (__dport)->rp_pwwn; \
- (__dport)->result.rp_nwwn = (__dport)->rp_nwwn; \
- (__dport)->result.lpcnt = (__dport)->lpcnt; \
+#define bfa_dport_result_start(__dport, __mode) do { \
+ (__dport)->result.start_time = ktime_get_real_seconds(); \
+ (__dport)->result.status = DPORT_TEST_ST_INPRG; \
+ (__dport)->result.mode = (__mode); \
+ (__dport)->result.rp_pwwn = (__dport)->rp_pwwn; \
+ (__dport)->result.rp_nwwn = (__dport)->rp_nwwn; \
+ (__dport)->result.lpcnt = (__dport)->lpcnt; \
} while (0)

static bfa_boolean_t bfa_dport_send_req(struct bfa_dport_s *dport,
@@ -6581,7 +6569,7 @@ bfa_dport_scn(struct bfa_dport_s *dport, struct bfi_diag_dport_scn_s *msg)

switch (dport->i2hmsg.scn.state) {
case BFI_DPORT_SCN_TESTCOMP:
- dport->result.end_time = bfa_get_log_time();
+ dport->result.end_time = ktime_get_real_seconds();
bfa_trc(dport->bfa, dport->result.end_time);

dport->result.status = msg->info.testcomp.status;
@@ -6628,7 +6616,7 @@ bfa_dport_scn(struct bfa_dport_s *dport, struct bfi_diag_dport_scn_s *msg)
case BFI_DPORT_SCN_SUBTESTSTART:
subtesttype = msg->info.teststart.type;
dport->result.subtest[subtesttype].start_time =
- bfa_get_log_time();
+ ktime_get_real_seconds();
dport->result.subtest[subtesttype].status =
DPORT_TEST_ST_INPRG;

--
2.9.0
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