mt76: mt7921: fix dma hang in rmmod

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The dma would be broken after rmmod flow. There are two different
cases causing this issue.
1. dma access without privilege.
2. hw access sequence borken by another context.

This patch handle both cases to avoid hw crash.

Fixes: 2b9ea5a8cf ("mt76: mt7921: add mt7921_dma_cleanup in mt7921_unregister_device")
Signed-off-by: Deren Wu <deren.wu@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

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Deren Wu 2021-07-27 17:47:09 +08:00 • committed by Felix Fietkau

parent 33920b2bf0

commit a23f80aa9c

1 changed files with 9 additions and 0 deletions

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drivers/net/wireless/mediatek/mt76/mt7921/init.c

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