net: niu: 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 44-bit mask, so advertise
NETIF_F_HIGHDMA directly after checking the result.

Signed-off-by: Ruizhe Zhou <zhouruizhe@resnics.com>
Link: https://patch.msgid.link/20260903084339.870562-15-zhouruizhe@resnics.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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Ruizhe Zhou 2026-09-03 16:43:39 +08:00 • committed by Jakub Kicinski

parent 0a8bc1ad90

commit 03011820f0

1 changed files with 3 additions and 7 deletions

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drivers/net/ethernet/sun/niu.c

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