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Subject[PATCH v3 05/13] net: ethernet: ti: cpts: fix registration order
Date
The ptp clock registered before spinlock, which is protecting it, and
before timecounter and cyclecounter initialization in cpts_register().

So, ensure that ptp clock is registered the last, after everything
else is done.

Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
---
drivers/net/ethernet/ti/cpts.c | 24 ++++++++++++++----------
1 file changed, 14 insertions(+), 10 deletions(-)

diff --git a/drivers/net/ethernet/ti/cpts.c b/drivers/net/ethernet/ti/cpts.c
index 61198f1..3dda6d5 100644
--- a/drivers/net/ethernet/ti/cpts.c
+++ b/drivers/net/ethernet/ti/cpts.c
@@ -356,15 +356,8 @@ int cpts_register(struct device *dev, struct cpts *cpts,
u32 mult, u32 shift)
{
int err, i;
- unsigned long flags;

cpts->info = cpts_info;
- cpts->clock = ptp_clock_register(&cpts->info, dev);
- if (IS_ERR(cpts->clock)) {
- err = PTR_ERR(cpts->clock);
- cpts->clock = NULL;
- return err;
- }
spin_lock_init(&cpts->lock);

cpts->cc.read = cpts_systim_read;
@@ -382,15 +375,26 @@ int cpts_register(struct device *dev, struct cpts *cpts,
cpts_write32(cpts, CPTS_EN, control);
cpts_write32(cpts, TS_PEND_EN, int_enable);

- spin_lock_irqsave(&cpts->lock, flags);
timecounter_init(&cpts->tc, &cpts->cc, ktime_to_ns(ktime_get_real()));
- spin_unlock_irqrestore(&cpts->lock, flags);

INIT_DELAYED_WORK(&cpts->overflow_work, cpts_overflow_check);
- schedule_delayed_work(&cpts->overflow_work, CPTS_OVERFLOW_PERIOD);

+ cpts->clock = ptp_clock_register(&cpts->info, dev);
+ if (IS_ERR(cpts->clock)) {
+ err = PTR_ERR(cpts->clock);
+ cpts->clock = NULL;
+ goto err_ptp;
+ }
cpts->phc_index = ptp_clock_index(cpts->clock);
+
+ schedule_delayed_work(&cpts->overflow_work, CPTS_OVERFLOW_PERIOD);
+
return 0;
+
+err_ptp:
+ if (cpts->refclk)
+ cpts_clk_release(cpts);
+ return err;
}
EXPORT_SYMBOL_GPL(cpts_register);

--
2.10.1
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