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SubjectRe: [PATCH] net: stmmac: reset Tx desc base address before restarting Tx
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From: Jongsung Kim <neidhard.kim@lge.com>
Date: Fri, 6 Dec 2019 20:40:00 +0900

> Refer to the databook of DesignWare Cores Ethernet MAC Universal:
>
> 6.2.1.5 Register 4 (Transmit Descriptor List Address Register
>
> If this register is not changed when the ST bit is set to 0, then
> the DMA takes the descriptor address where it was stopped earlier.
>
> The stmmac_tx_err() does zero indices to Tx descriptors, but does
> not reset HW current Tx descriptor address. To fix inconsistency,
> the base address of the Tx descriptors should be rewritten before
> restarting Tx.
>
> Signed-off-by: Jongsung Kim <neidhard.kim@lge.com>

Applied.

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