From: Quan Zhou Date: Wed, 12 Apr 2023 21:11:14 +0000 (+0800) Subject: wifi: mt76: mt7921e: stop chip reset worker in unregister hook X-Git-Tag: v6.6.7~2736^2~72^2~1^2~10 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=3d78c46423c6567ed25ca033e086865b1b4d5ae1;p=platform%2Fkernel%2Flinux-starfive.git wifi: mt76: mt7921e: stop chip reset worker in unregister hook 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 Signed-off-by: Sean Wang Co-developed-by: Deren Wu Signed-off-by: Deren Wu Co-developed-by: Wang Zhao Signed-off-by: Wang Zhao Signed-off-by: Quan Zhou Signed-off-by: Felix Fietkau --- diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/pci.c b/drivers/net/wireless/mediatek/mt76/mt7921/pci.c index 40bea17..1c72787 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7921/pci.c +++ b/drivers/net/wireless/mediatek/mt76/mt7921/pci.c @@ -113,9 +113,10 @@ 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);