• Ivan Vecera's avatar
    net: atlantic: Fix DMA mapping for PTP hwts ring · 2e7d3b67
    Ivan Vecera authored
    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]
    
    Fixes: 94ad9455 ("net: aquantia: add PTP rings infrastructure")
    Signed-off-by: default avatarIvan Vecera <ivecera@redhat.com>
    Reviewed-by: default avatarJiri Pirko <jiri@nvidia.com>
    Link: https://lore.kernel.org/r/20240201094752.883026-1-ivecera@redhat.comSigned-off-by: default avatarJakub Kicinski <kuba@kernel.org>
    2e7d3b67
aq_ptp.c 33.2 KB