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r8169: reset chip synchronously in __rtl8169_resume

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Triggering an asynchronous reset is problematic for the following
reasons, therefore reset the chip synchronously.

- The reset routine resets registers and parameters behind our back
  what may collide with code executed after triggering the reset.

- __rtl8169_resume() is called as part of pm_runtime_get_sync() and
  callers expect that the chip is fully resumed afterwards.

In context of this driver triggering an asynchonous reset should be
considered an emergency procedure.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Heiner Kallweit 2019-01-19 22:06:25 +01:00 committed by David S. Miller
parent df320ed7b3
commit 58ba566ccb
1 changed files with 1 additions and 2 deletions
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3
drivers/net/ethernet/realtek/r8169.c
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@ -6787,9 +6787,8 @@ static void __rtl8169_resume(struct net_device *dev)
rtl_lock_work(tp);
napi_enable(&tp->napi);
set_bit(RTL_FLAG_TASK_ENABLED, tp->wk.flags);
rtl_reset_work(tp);
rtl_unlock_work(tp);
rtl_schedule_task(tp, RTL_FLAG_TASK_RESET_PENDING);
}
static int rtl8169_resume(struct device *device)