linux-kernel - Re: [PATCH v8 0/3] usb: xhci-platform: Configure 64-bit DMA mask if the platform is capable

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Date:	Wed, 30 Sep 2015 14:24:30 -0700
From:	Duc Dang <dhdang@....com>
To:	Greg KH <gregkh@...uxfoundation.org>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	Loc Ho <lho@....com>, Arnd Bergmann <arnd@...db.de>,
	mathias.nyman@...el.com
Cc:	USB list <linux-usb@...r.kernel.org>,
	linux-arm <linux-arm-kernel@...ts.infradead.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Mark Langsdorf <mlangsdo@...hat.com>,
	patches <patches@....com>, Feng Kan <fkan@....com>,
	Duc Dang <dhdang@....com>
Subject: Re: [PATCH v8 0/3] usb: xhci-platform: Configure 64-bit DMA mask if
 the platform is capable

On Thu, Sep 17, 2015 at 11:19 AM, Duc Dang <dhdang@....com> wrote:
> The xhci platform driver does not work with system that only supports
> 64-bit DMA as it requests 32-bit DMA mask during driver initialization.
> This patch set addresses this issue and also adds XHCI-compliant USB
> Controller ACPI identification into xhci-platform driver.

Hi Greg, Mathias,

Arnd already ack-ed the first patch, please let me know if you have
more comment on this set?

>
> Changes from v7:
>         - Only use dma_coerce_mask_and_coherent when
>         dma_mask is NULL
>         - Check the controller DMA capability and configure
>         32-bit dma_mask if it only supports 32-bit DMA
>         - Patches is generated over v4.3-rc1
>
> Changes from v6:
>         -Add WARN_ON if dma_mask is NULL
>         -Use dma_coerce_mask_and_coherent to assign
>         dma_mask and coherent_dma_mask
>
> Change from v5:
>         -Change comment to "XHCI-compliant USB Controller" as
>         "PNP0D10" ID is not X-Gene specific
>         -Change comment
>         -Assign dma_mask to coherent_dma_mask if dma_mask is NULL
>         to make sure dma_set_mask_and_coherent does not fail prematurely.
>
> Changes from v4:
>         -Remove #ifdef CONFIG_ACPI
>         -Change comment
>         -Assign dma_mask to coherent_dma_mask if dma_mask is NULL
>         to make sure dma_set_mask_and_coherent does not fail prematurely.
>
> Changes from v3:
>         -Regenerate the patch over 4.2-rc5
>         -No code change
>
> Changes from v2
>         -Replaced tristate with a boolean as the driver doesn't
>                 compile as a module
>         -Correct --help-- to ---help---
>
> Changes from v1
>         -Consolidated to use dma_set_mask_and_coherent
>         -Got rid of the check against sizeof(dma_addr_t)
>         -Renamed from "add support for APM X-Gene to xhci-platform"
>         -Removed changes to arm64/Kconfig
>         -Made CONFIG_USB_XHCI_PLATFORM a user selectable config option
>
>  drivers/usb/host/xhci-plat.c | 29 ++++++++++++++++++++++-------
>  drivers/usb/host/xhci.c      | 10 ++++++++++
>  2 files changed, 32 insertions(+), 7 deletions(-)
>
> --
> 1.9.1
>

Regards,
Duc Dang.
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