[PATCH] mt76: mt7921: fix the inconsistent state between bind and unbind

[Chen-Yu Tsai]

On Mon, Aug 23, 2021 at 10:27 AM <sean.wang at mediatek.com> wrote:
>
> From: Sean Wang <sean.wang at mediatek.com>
>
> We shouldn't put back the device into fw own state after wifi reset at
> driver unbind stage to fix the following error because that is not the
> consistent state the current driver bind stage expects.
>
> localhost ~ # echo 0000:01:00.0 > /sys/bus/pci/drivers/mt7921e/unbind
> localhost ~ # echo 0000:01:00.0 > /sys/bus/pci/drivers/mt7921e/bind
> ...
> [  481.172969] mt7921e 0000:01:00.0: ASIC revision: feed0000
> [  482.133547] mt7921e: probe of 0000:01:00.0 failed with error -110
> -bash: echo: write error: No such device
>
> Fixes: c1af184ba830 ("mt76: mt7921: fix dma hang in rmmod")
> Co-developed-by: YN Chen <YN.Chen at mediatek.com>
> Signed-off-by: YN Chen <YN.Chen at mediatek.com>
> Signed-off-by: Sean Wang <sean.wang at mediatek.com>

Tested-by: Chen-Yu Tsai <wenst at chromium.org>