From: Bryan Whitehead <[email protected]>
Date: Wed, 13 Mar 2019 15:55:48 -0400
> It has been observed that tx queue may stall while downloading
> from certain web sites (example www.speedtest.net)
>
> The cause has been tracked down to a corner case where
> the tx interrupt vector was disabled automatically, but
> was not re enabled later.
>
> The lan743x has two mechanisms to enable/disable individual
> interrupts. Interrupts can be enabled/disabled by individual
> source, and they can also be enabled/disabled by individual
> vector which has been mapped to the source. Both must be
> enabled for interrupts to work properly.
>
> The TX code path, primarily uses the interrupt enable/disable of
> the TX source bit, while leaving the vector enabled all the time.
>
> However, while investigating this issue it was noticed that
> the driver requested the use of the vector auto clear feature.
>
> The test above revealed a case where the vector enable was
> cleared unintentionally.
>
> This patch fixes the issue by deleting the lines that request
> the vector auto clear feature to be used.
>
> Fixes: 23f0703c125b ("lan743x: Add main source files for new lan743x driver")
> Signed-off-by: Bryan Whitehead <[email protected]>
Applied and queued up for -stable.
