From: Quan Zhou <quan.zhou@xxxxxxxxxxxx>
[ Upstream commit 3d78c46423c6567ed25ca033e086865b1b4d5ae1 ]
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@xxxxxxxxxxxx>
Signed-off-by: Sean Wang <sean.wang@xxxxxxxxxxxx>
Co-developed-by: Deren Wu <deren.wu@xxxxxxxxxxxx>
Signed-off-by: Deren Wu <deren.wu@xxxxxxxxxxxx>
Co-developed-by: Wang Zhao <wang.zhao@xxxxxxxxxxxx>
Signed-off-by: Wang Zhao <wang.zhao@xxxxxxxxxxxx>
Signed-off-by: Quan Zhou <quan.zhou@xxxxxxxxxxxx>
Signed-off-by: Felix Fietkau <nbd@xxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
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 bda92d8359692..aa4ecf008a3c9 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);
--
2.39.2
