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r8152: avoid start_xmit to call napi_schedule during autosuspend 

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>
This commit is contained in:
hayeswang 2017-01-26 09:38:31 +08:00 committed by David S. Miller
parent f154be241d
commit 26afec3930
1 changed files with 9 additions and 3 deletions
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12
drivers/net/usb/r8152.c
View File

@ -3585,10 +3585,15 @@ 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;
}
@ -3605,6 +3610,8 @@ 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;
}
@ -3624,8 +3631,6 @@ static int rtl8152_rumtime_suspend(struct r8152 *tp)
}
}
set_bit(SELECTIVE_SUSPEND, &tp->flags);
out1:
return ret;
}
@ -3681,12 +3686,13 @@ 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);