[PATCH 4.4 33/34] net: gianfar_ptp: move set_fipers() to spinlock protecting area

[Greg Kroah-Hartman]

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Yangbo Lu <yangbo.lu@xxxxxxx>


[ Upstream commit 11d827a993a969c3c6ec56758ff63a44ba19b466 ]

set_fipers() calling should be protected by spinlock in
case that any interrupt breaks related registers setting
and the function we expect. This patch is to move set_fipers()
to spinlock protecting area in ptp_gianfar_adjtime().

Signed-off-by: Yangbo Lu <yangbo.lu@xxxxxxx>
Acked-by: Richard Cochran <richardcochran@xxxxxxxxx>
Reviewed-by: Fabio Estevam <fabio.estevam@xxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/net/ethernet/freescale/gianfar_ptp.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/drivers/net/ethernet/freescale/gianfar_ptp.c
+++ b/drivers/net/ethernet/freescale/gianfar_ptp.c
@@ -314,11 +314,10 @@ static int ptp_gianfar_adjtime(struct pt
 	now = tmr_cnt_read(etsects);
 	now += delta;
 	tmr_cnt_write(etsects, now);
+	set_fipers(etsects);
 
 	spin_unlock_irqrestore(&etsects->lock, flags);
 
-	set_fipers(etsects);
-
 	return 0;
 }