eth: fbnic: Remove obsolete 32-bit DMA mask fallback

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.

Signed-off-by: Ruizhe Zhou <zhouruizhe@resnics.com>
Link: https://patch.msgid.link/20260903084339.870562-12-zhouruizhe@resnics.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Ruizhe Zhou 2026-09-03 16:43:36 +08:00 • committed by Jakub Kicinski
commit 453248082a