rtw88: refine napi deinit flow

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We used to stop napi before disabling irqs. And it turns out
to cause some problem when we try to stop device while interrupt arrives.

To safely stop pci, we do three steps:
1. disable interrupt
2. synchronize_irq
3. stop_napi
Since step 2 and 3 may not finish as expected when interrupt is enabled,
use rtwpci->running to decide whether interrupt should be re-enabled at
the time.

Fixes: 9e2fd29864 ("rtw88: add napi support")
Signed-off-by: Po-Hao Huang <phhuang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20210415084703.27255-4-pkshih@realtek.com

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Po-Hao Huang 2021-04-15 16:47:03 +08:00 • committed by Kalle Valo

parent a548909d7a

commit 7bd3760c71

2 changed files with 15 additions and 5 deletions

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19

drivers/net/wireless/realtek/rtw88/pci.c

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1

drivers/net/wireless/realtek/rtw88/pci.h

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