linux-kernel - Re: [PATCH net] net: atlantic: Fix DMA mapping for PTP hwts ring

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Message-Id: 
 <170693582785.20949.4926544018376508267.git-patchwork-notify@kernel.org>
Date: Sat, 03 Feb 2024 04:50:27 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Ivan Vecera <ivecera@...hat.com>
Cc: netdev@...r.kernel.org, epomozov@...vell.com, irusskikh@...vell.com,
 davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
 richardcochran@...il.com, dmitry.bezrukov@...antia.com,
 sergey.samoilenko@...antia.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net] net: atlantic: Fix DMA mapping for PTP hwts ring

Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@...nel.org>:

On Thu,  1 Feb 2024 10:47:51 +0100 you wrote:
> Function aq_ring_hwts_rx_alloc() maps extra AQ_CFG_RXDS_DEF bytes
> for PTP HWTS ring but then generic aq_ring_free() does not take this
> into account.
> Create and use a specific function to free HWTS ring to fix this
> issue.
> 
> Trace:
> [  215.351607] ------------[ cut here ]------------
> [  215.351612] DMA-API: atlantic 0000:4b:00.0: device driver frees DMA memory with different size [device address=0x00000000fbdd0000] [map size=34816 bytes] [unmap size=32768 bytes]
> [  215.351635] WARNING: CPU: 33 PID: 10759 at kernel/dma/debug.c:988 check_unmap+0xa6f/0x2360
> ...
> [  215.581176] Call Trace:
> [  215.583632]  <TASK>
> [  215.585745]  ? show_trace_log_lvl+0x1c4/0x2df
> [  215.590114]  ? show_trace_log_lvl+0x1c4/0x2df
> [  215.594497]  ? debug_dma_free_coherent+0x196/0x210
> [  215.599305]  ? check_unmap+0xa6f/0x2360
> [  215.603147]  ? __warn+0xca/0x1d0
> [  215.606391]  ? check_unmap+0xa6f/0x2360
> [  215.610237]  ? report_bug+0x1ef/0x370
> [  215.613921]  ? handle_bug+0x3c/0x70
> [  215.617423]  ? exc_invalid_op+0x14/0x50
> [  215.621269]  ? asm_exc_invalid_op+0x16/0x20
> [  215.625480]  ? check_unmap+0xa6f/0x2360
> [  215.629331]  ? mark_lock.part.0+0xca/0xa40
> [  215.633445]  debug_dma_free_coherent+0x196/0x210
> [  215.638079]  ? __pfx_debug_dma_free_coherent+0x10/0x10
> [  215.643242]  ? slab_free_freelist_hook+0x11d/0x1d0
> [  215.648060]  dma_free_attrs+0x6d/0x130
> [  215.651834]  aq_ring_free+0x193/0x290 [atlantic]
> [  215.656487]  aq_ptp_ring_free+0x67/0x110 [atlantic]
> ...
> [  216.127540] ---[ end trace 6467e5964dd2640b ]---
> [  216.132160] DMA-API: Mapped at:
> [  216.132162]  debug_dma_alloc_coherent+0x66/0x2f0
> [  216.132165]  dma_alloc_attrs+0xf5/0x1b0
> [  216.132168]  aq_ring_hwts_rx_alloc+0x150/0x1f0 [atlantic]
> [  216.132193]  aq_ptp_ring_alloc+0x1bb/0x540 [atlantic]
> [  216.132213]  aq_nic_init+0x4a1/0x760 [atlantic]
> 
> [...]

Here is the summary with links:
  - [net] net: atlantic: Fix DMA mapping for PTP hwts ring
    https://git.kernel.org/netdev/net/c/2e7d3b67630d

You are awesome, thank you!
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