netdev - RE: [Intel-wired-lan] [PATCH] ixgbe: Remove useless DMA-32 fallback configuration

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <BYAPR11MB3367BB6A6D67E41A6EE574A5FC539@BYAPR11MB3367.namprd11.prod.outlook.com>
Date:   Thu, 13 Jan 2022 17:57:12 +0000
From:   "G, GurucharanX" <gurucharanx.g@...el.com>
To:     Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        "Brandeburg, Jesse" <jesse.brandeburg@...el.com>,
        "Nguyen, Anthony L" <anthony.l.nguyen@...el.com>,
        "David S. Miller" <davem@...emloft.net>,
        "Jakub Kicinski" <kuba@...nel.org>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "kernel-janitors@...r.kernel.org" <kernel-janitors@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>,
        Christoph Hellwig <hch@....de>
Subject: RE: [Intel-wired-lan] [PATCH] ixgbe: Remove useless DMA-32 fallback
 configuration



> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@...osl.org> On Behalf Of
> Christophe JAILLET
> Sent: Sunday, January 9, 2022 10:51 PM
> To: Brandeburg, Jesse <jesse.brandeburg@...el.com>; Nguyen, Anthony L
> <anthony.l.nguyen@...el.com>; David S. Miller <davem@...emloft.net>;
> Jakub Kicinski <kuba@...nel.org>
> Cc: netdev@...r.kernel.org; kernel-janitors@...r.kernel.org; linux-
> kernel@...r.kernel.org; Christophe JAILLET
> <christophe.jaillet@...adoo.fr>; intel-wired-lan@...ts.osuosl.org; Christoph
> Hellwig <hch@....de>
> Subject: [Intel-wired-lan] [PATCH] ixgbe: 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@...adoo.fr>
> Reviewed-by: Christoph Hellwig <hch@....de>
> Reviewed-by: Alexander Lobakin <alexandr.lobakin@...el.com>
> ---
>  drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 20 +++++++------------
>  1 file changed, 7 insertions(+), 13 deletions(-)
> 

Tested-by: Gurucharan G <gurucharanx.g@...el.com> (A Contingent worker at Intel)