Re: [PATCH] i40e: Remove useless DMA-32 fallback configuration

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Le 09/01/2022 à 18:14, Christophe JAILLET a écrit :
As stated in [1], dma_set_mask() with a 64-bit mask never fails if
dev->dma_mask is non-NULL.
So, if it fails, the 32 bits case will also fail for the same reason.

So, if dma_set_mask_and_coherent() succeeds, 'pci_using_dac' is known to be
1.

Simplify code and remove some dead code accordingly.

[1]: https://lkml.org/lkml/2021/6/7/398

Signed-off-by: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Alexander Lobakin <alexandr.lobakin@xxxxxxxxx>
---
  drivers/net/ethernet/intel/e1000e/netdev.c | 22 +++++++---------------
  1 file changed, 7 insertions(+), 15 deletions(-)

NAK, wrong subject

CJ



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