[PATCH v4 05/13] net: ethernet: ti: cpts: fix registration order

[Grygorii Strashko]

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.

Signed-off-by: Grygorii Strashko <grygorii.stras...@ti.com>
Acked-by: Richard Cochran <richardcoch...@gmail.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