Re: [PATCH net-next] net: stmmac: bump tc when get underflow error from DMA descriptor

Hello:

This patch was applied to netdev/net-next.git (master)
by David S. Miller [off-list ref]:

On Wed,  8 Dec 2021 18:06:51 +0800 you wrote:

In DMA threshold mode, frame underflow errors may sometimes occur when
the TC(threshold control) value is not enough. The TC value need to be
bumped up in this case.

There is no underflow interrupt bit on DMA_CH(#i)_Status of dwmac4, so
the DMA threshold cannot be bumped up in stmmac_dma_interrupt(). The
i.mx8mp board observed an underflow error while running NFS boot, the
NFS rootfs could not be mounted.

[...]

Here is the summary with links:
  - [net-next] net: stmmac: bump tc when get underflow error from DMA descriptor
    https://git.kernel.org/netdev/net-next/c/3a6c12a0c6c3

You are awesome, thank you!
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