[PATCH 4.9 54/56] net: gianfar_ptp: move set_fipers() to spinlock protecting area

Greg Kroah-Hartman
2018-03-02T08:51:40Z

From: Yangbo Lu <yangbo.lu@nxp.com>

[ 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@nxp.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
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;
}