linux-kernel - Re: [PATCH v4 3/3] mmc: sdhci-pci: Do not set DMA mask in enable

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

Date:	Mon, 14 Mar 2016 12:15:51 +0900
From:	Alexandre Courbot <gnurou@...il.com>
To:	Adrian Hunter <adrian.hunter@...el.com>
Cc:	linux-pci@...r.kernel.org, Bjorn Helgaas <bhelgaas@...gle.com>,
	Alexandre Courbot <acourbot@...dia.com>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	Arnd Bergmann <arnd@...db.de>,
	linux-mmc <linux-mmc@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 3/3] mmc: sdhci-pci: Do not set DMA mask in enable_dma()

On Tue, Mar 8, 2016 at 10:18 PM, Adrian Hunter <adrian.hunter@...el.com> wrote:
> On 07/03/16 04:07, Alexandre Courbot wrote:
>> DMA mask will already be set by sdhci_set_dma_mask(), which
>> is equivalent to the removed code since pci_set_dma_mask()
>> expands to its DMA-API counterpart.
>>
>> There should also be no reason to set the DMA mask after probe.
>
> Let's run that by the PCI mailing list just to be sure.  The patches for
> reference:
>
>         http://marc.info/?l=linux-mmc&m=145731654328126&w=2
>         http://marc.info/?l=linux-mmc&m=145731654328128&w=2
>
> change the sdhci-pci driver to set the DMA mask once during probe instead of
> every time during resume.  Is there any reason a PCI device driver might
> need to set the DMA mask every time during resume?

Not seeing much reaction for this patchset. PCI being the only
possible point of contention, can we maybe roll it into -next and see
what happens?