diff options
| author | hayeswang <hayeswang@realtek.com> | 2017-01-26 09:38:31 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-06-17 06:41:55 +0200 |
| commit | 993ba7ffcf6e0aa5e4b3ed193a99fc8f4e073325 (patch) | |
| tree | e1d57ed97c418a6c39aeb08256166add71c4f7f6 | |
| parent | 6149abe7f4042e5720544d4e5675d7a45a827ce7 (diff) | |
r8152: avoid start_xmit to call napi_schedule during autosuspend
[ Upstream commit 26afec39306926654e9cd320f19bbf3685bb0997 ]
Adjust the setting of the flag of SELECTIVE_SUSPEND to prevent start_xmit()
from calling napi_schedule() directly during runtime suspend.
After calling napi_disable() or clearing the flag of WORK_ENABLE,
scheduling the napi is useless.
Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/net/usb/r8152.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c index 90b426c5ffce..92c53d64fdc2 100644 --- a/drivers/net/usb/r8152.c +++ b/drivers/net/usb/r8152.c @@ -3583,10 +3583,15 @@ static int rtl8152_rumtime_suspend(struct r8152 *tp) struct net_device *netdev = tp->netdev; int ret = 0; + set_bit(SELECTIVE_SUSPEND, &tp->flags); + smp_mb__after_atomic(); + if (netif_running(netdev) && test_bit(WORK_ENABLE, &tp->flags)) { u32 rcr = 0; if (delay_autosuspend(tp)) { + clear_bit(SELECTIVE_SUSPEND, &tp->flags); + smp_mb__after_atomic(); ret = -EBUSY; goto out1; } @@ -3603,6 +3608,8 @@ static int rtl8152_rumtime_suspend(struct r8152 *tp) if (!(ocp_data & RXFIFO_EMPTY)) { rxdy_gated_en(tp, false); ocp_write_dword(tp, MCU_TYPE_PLA, PLA_RCR, rcr); + clear_bit(SELECTIVE_SUSPEND, &tp->flags); + smp_mb__after_atomic(); ret = -EBUSY; goto out1; } @@ -3622,8 +3629,6 @@ static int rtl8152_rumtime_suspend(struct r8152 *tp) } } - set_bit(SELECTIVE_SUSPEND, &tp->flags); - out1: return ret; } @@ -3679,12 +3684,13 @@ static int rtl8152_resume(struct usb_interface *intf) if (netif_running(tp->netdev) && tp->netdev->flags & IFF_UP) { if (test_bit(SELECTIVE_SUSPEND, &tp->flags)) { tp->rtl_ops.autosuspend_en(tp, false); - clear_bit(SELECTIVE_SUSPEND, &tp->flags); napi_disable(&tp->napi); set_bit(WORK_ENABLE, &tp->flags); if (netif_carrier_ok(tp->netdev)) rtl_start_rx(tp); napi_enable(&tp->napi); + clear_bit(SELECTIVE_SUSPEND, &tp->flags); + smp_mb__after_atomic(); } else { tp->rtl_ops.up(tp); netif_carrier_off(tp->netdev); |