[PATCH 10/10] wifi: mt76: mt7996: add sanity check for NAPI schedule

Shayne Chen (陳軒丞) Shayne.Chen at mediatek.com
Sun Apr 7 22:57:42 PDT 2024


On Wed, 2024-04-03 at 12:57 +0200, Felix Fietkau wrote:
>  	 
> External email : Please do not click links or open attachments until
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>  On 20.03.24 12:09, Shayne Chen wrote:
> > From: Henry Yen <henry.yen at mediatek.com>
> > 
> > It's observed that host driver might occasionally receive
> > interrupts from unexpected Rx ring, whose Rx NAPI hasn't been
> > prepared yet. Under such situation, __napi_poll crash issue
> > would occur, so we add a sanity check to prevent it.
> > 
> > Without this patch, we might encounter kernel crash issue
> > especially in WED-on & RRO-on software path.
> 
> Does this issue occur even with Lorenzo's fix "wifi: mt76: mt7996:
> fix 
> uninitialized variable in mt7996_irq_tasklet()"?
> 
They achieve the same purpose, please drop this patch.

Thanks,
Shayne
> - Felix


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