[PATCH v2 2/2] wifi: mt76: mt7921e: stop chip reset worker in unregister hook

[sean.wang at mediatek.com]

From: Quan Zhou <quan.zhou at mediatek.com>

If the chip reset worker is triggered during the remove process, the chip
DMA may not be properly pushed back to the idle state. This can lead to
corruption of the DMA flow due to the chip reset. Therefore, it is
necessary to stop the chip reset before the DMA is finalized.

To avoid resetting the chip after the reset worker is cancelled, use
__mt7921_mcu_drv_pmctrl() instead of mt7921_mcu_drv_pmctrl(). It is safe to
ignore the pm mutex because the pm worker and wake worker have already been
cancelled.

Fixes: 033ae79b3830 ("mt76: mt7921: refactor init.c to be bus independent")
Co-developed-by: Sean Wang <sean.wang at mediatek.com>
Signed-off-by: Sean Wang <sean.wang at mediatek.com>
Co-developed-by: Deren Wu <deren.wu at mediatek.com>
Signed-off-by: Deren Wu <deren.wu at mediatek.com>
Co-developed-by: Wang Zhao <wang.zhao at mediatek.com>
Signed-off-by: Wang Zhao <wang.zhao at mediatek.com>
Signed-off-by: Quan Zhou <quan.zhou at mediatek.com>
---
v2: update the commit message to ensure that it is consistent between the
    patch content and the documentation. This will help to accurately
    reflect the changes made and make it easier for other developers to
    understand the purpose of the update.
---
 drivers/net/wireless/mediatek/mt76/mt7921/pci.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/pci.c b/drivers/net/wireless/mediatek/mt76/mt7921/pci.c
index 1a8a54a46dcc..c592903157d0 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/pci.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/pci.c
@@ -115,9 +115,10 @@ static void mt7921e_unregister_device(struct mt7921_dev *dev)
 		napi_disable(&dev->mt76.napi[i]);
 	cancel_delayed_work_sync(&pm->ps_work);
 	cancel_work_sync(&pm->wake_work);
+	cancel_work_sync(&dev->reset_work);
 
 	mt7921_tx_token_put(dev);
-	mt7921_mcu_drv_pmctrl(dev);
+	__mt7921_mcu_drv_pmctrl(dev);
 	mt7921_dma_cleanup(dev);
 	mt7921_wfsys_reset(dev);
 	skb_queue_purge(&dev->mt76.mcu.res_q);
-- 
2.25.1