enic: 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 wider 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.
A successful setup now necessarily uses the 47-bit mask, so remove the
redundant using_dac flag and advertise NETIF_F_HIGHDMA directly.

Signed-off-by: Ruizhe Zhou <zhouruizhe@resnics.com>
Link: https://patch.msgid.link/20260903084339.870562-6-zhouruizhe@resnics.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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Ruizhe Zhou 2026-09-03 16:43:30 +08:00 • committed by Jakub Kicinski

parent f60b86ea88

commit 0b861b6ee2

1 changed files with 4 additions and 15 deletions

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drivers/net/ethernet/cisco/enic/enic_main.c

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