[PATCH] net: stmmac: stop DMA before freeing descriptors on open

patchwork-bot+netdevbpf at kernel.org patchwork-bot+netdevbpf at kernel.org
Mon Aug 31 17:20:14 PDT 2026


Hello:

This patch was applied to netdev/net-next.git (main)
by Jakub Kicinski <kuba at kernel.org>:

On Thu, 27 Aug 2026 10:54:15 +0800 you wrote:
> In __stmmac_open() and stmmac_xdp_open(), the DMA engine is started
> before stmmac_request_irq() is called.  If the IRQ request fails, the
> clean-up paths free the DMA descriptor rings via dma_free_coherent()
> without stopping the DMA engine first.
> 
> With the DMA engine still running, hardware may continue to access the
> descriptor ring memory after it has been freed.  Add stmmac_stop_all_dma()
> to both error paths, matching the teardown order in __stmmac_release().
> 
> [...]

Here is the summary with links:
  - net: stmmac: stop DMA before freeing descriptors on open
    https://git.kernel.org/netdev/net-next/c/25c1f6111034

You are awesome, thank you!
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