[PATCH v4 05/13] net: ethernet: ti: cpts: fix registration order
From: Grygorii Strashko <grygorii.strashko@ti.com>
Date: 2016-12-05 20:07:08
Also in:
linux-devicetree, linux-omap, lkml
Subsystem:
networking drivers, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
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.strashko@ti.com> Acked-by: Richard Cochran <richardcochran@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