From: "G, GurucharanX" <gurucharanx.g@intel.com>
To: Christophe JAILLET <christophe.jaillet@wanadoo.fr>,
"Brandeburg, Jesse" <jesse.brandeburg@intel.com>,
"Nguyen, Anthony L" <anthony.l.nguyen@intel.com>,
"David S. Miller" <davem@davemloft.net>,
"Jakub Kicinski" <kuba@kernel.org>
Cc: "netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"kernel-janitors@vger.kernel.org"
<kernel-janitors@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"intel-wired-lan@lists.osuosl.org"
<intel-wired-lan@lists.osuosl.org>,
Christoph Hellwig <hch@lst.de>
Subject: RE: [Intel-wired-lan] [PATCH] i40e: Remove useless DMA-32 fallback configuration
Date: Thu, 13 Jan 2022 18:33:36 +0000 [thread overview]
Message-ID: <BYAPR11MB3367FFB4154822E9D881C8ACFC539@BYAPR11MB3367.namprd11.prod.outlook.com> (raw)
In-Reply-To: <5549ec8837b3a6fab83e92c5206cc100ffd23d85.1641748468.git.christophe.jaillet@wanadoo.fr>
> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@osuosl.org> On Behalf Of
> Christophe JAILLET
> Sent: Sunday, January 9, 2022 10:45 PM
> To: Brandeburg, Jesse <jesse.brandeburg@intel.com>; Nguyen, Anthony L
> <anthony.l.nguyen@intel.com>; David S. Miller <davem@davemloft.net>;
> Jakub Kicinski <kuba@kernel.org>
> Cc: netdev@vger.kernel.org; kernel-janitors@vger.kernel.org; linux-
> kernel@vger.kernel.org; Christophe JAILLET
> <christophe.jaillet@wanadoo.fr>; intel-wired-lan@lists.osuosl.org; Christoph
> Hellwig <hch@lst.de>
> Subject: [Intel-wired-lan] [PATCH] i40e: Remove useless DMA-32 fallback
> configuration
>
> 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@wanadoo.fr>
> Reviewed-by: Christoph Hellwig <hch@lst.de>
> Reviewed-by: Alexander Lobakin <alexandr.lobakin@intel.com>
> ---
> drivers/net/ethernet/intel/e1000e/netdev.c | 22 +++++++---------------
> 1 file changed, 7 insertions(+), 15 deletions(-)
>
Tested-by: Gurucharan G <gurucharanx.g@intel.com> (A Contingent worker at Intel)
prev parent reply other threads:[~2022-01-13 18:33 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-09 17:14 [PATCH] i40e: Remove useless DMA-32 fallback configuration Christophe JAILLET
2022-01-09 17:30 ` Christophe JAILLET
2022-01-13 17:50 ` [Intel-wired-lan] " G, GurucharanX
2022-01-13 18:33 ` G, GurucharanX [this message]
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