mlxsw: pci: Remove obsolete 32-bit DMA mask fallback

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The DMA API guarantees support for masks of 32 bits or wider and
explicitly identifies retrying a 32-bit mask after a 64-bit request as
incorrect:
https://docs.kernel.org/core-api/dma-api-howto.html#dma-addressing-capabilities

Remove the obsolete fallback while retaining the error check so that a
genuine DMA setup failure is still reported and aborts initialization.
Update the error message to identify the combined streaming and coherent
DMA mask operation.

Signed-off-by: Ruizhe Zhou <zhouruizhe@resnics.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Link: https://patch.msgid.link/20260903084339.870562-11-zhouruizhe@resnics.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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This commit is contained in:

Ruizhe Zhou 2026-09-03 16:43:35 +08:00 • committed by Jakub Kicinski

parent 7b85fba09e

commit 68161cab48

1 changed files with 2 additions and 5 deletions

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drivers/net/ethernet/mellanox/mlxsw/pci.c

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