From a93439cce2c1d31469e8245c504dbb6d1bed8749 Mon Sep 17 00:00:00 2001 From: Grygorii Strashko Date: Fri, 28 Jul 2017 17:30:05 -0500 Subject: [PATCH] net: ethernet: ti: cpts: fix fifo read in cpts_find_ts Now the call chain cpts_find_ts() |- cpts_fifo_read(cpts, CPTS_EV_PUSH) will stop reading CPTS FIFO if PUSH event is found. But this is not expected and CPTS FIFI should be completely drained here. This is most probably copy-paste error and it has no negative impact as CPTS_EV_PUSH should not be present in FIFO without TS_PUSH request and cpts_systim_read() and cpts_find_ts() synchronized by spin_lock. Correct above by calling cpts_fifo_read() with -1 parameter, so it will read all CPTS event from FIFO. Signed-off-by: Grygorii Strashko Signed-off-by: David S. Miller --- drivers/net/ethernet/ti/cpts.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/ti/cpts.c b/drivers/net/ethernet/ti/cpts.c index 95a0076773b3..c2121d214f08 100644 --- a/drivers/net/ethernet/ti/cpts.c +++ b/drivers/net/ethernet/ti/cpts.c @@ -364,7 +364,7 @@ static u64 cpts_find_ts(struct cpts *cpts, struct sk_buff *skb, int ev_type) return 0; spin_lock_irqsave(&cpts->lock, flags); - cpts_fifo_read(cpts, CPTS_EV_PUSH); + cpts_fifo_read(cpts, -1); list_for_each_safe(this, next, &cpts->events) { event = list_entry(this, struct cpts_event, list); if (event_expired(event)) { -- 2.20.1