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; }