Re: [PATCH 09/14] ata: Use 32bit DMA in AHCI for Loongson 3.

To:	Huacai Chen <chenhuacai@gmail.com>
Subject:	Re: [PATCH 09/14] ata: Use 32bit DMA in AHCI for Loongson 3.
From:	Borislav Petkov <bp@alien8.de>
Date:	Mon, 18 Jun 2012 16:52:31 +0200
Cc:	Sergei Shtylyov <sshtylyov@mvista.com>, Ralf Baechle <ralf@linux-mips.org>, linux-mips@linux-mips.org, Fuxin Zhang <zhangfx@lemote.com>, Zhangjin Wu <wuzhangjin@gmail.com>, Huacai Chen <chenhc@lemote.com>, Hongliang Tao <taohl@lemote.com>, Hua Yan <yanh@lemote.com>, linux-ide@vger.kernel.org
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On Mon, Jun 18, 2012 at 06:41:58PM +0800, Huacai Chen wrote:
> Ohh, this is because Loongson-3 has a hardware bug, when the HT
> controller receive a 64-bit DMA address, the high bits is lost. So set
> to 32-bit DMA is just a workaround.

Ok, this should definitely go into the commit message of your patch then
since it explains why you need that flag set.

Thanks.

-- 
Regards/Gruss,
Boris.

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Re: [PATCH 07/14] MIPS: Loongson 3: Add serial port support., (continued) Re: [PATCH 07/14] MIPS: Loongson 3: Add serial port support., Rtp Re: [PATCH 07/14] MIPS: Loongson 3: Add serial port support., huacai chen [PATCH 08/14] MIPS: Loongson: Add swiotlb to support big memory (>4GB)., Huacai Chen [PATCH 09/14] ata: Use 32bit DMA in AHCI for Loongson 3., Huacai Chen Re: [PATCH 09/14] ata: Use 32bit DMA in AHCI for Loongson 3., Sergei Shtylyov Re: [PATCH 09/14] ata: Use 32bit DMA in AHCI for Loongson 3., huacai chen Re: [PATCH 09/14] ata: Use 32bit DMA in AHCI for Loongson 3., Borislav Petkov Re: [PATCH 09/14] ata: Use 32bit DMA in AHCI for Loongson 3., huacai chen Re: [PATCH 09/14] ata: Use 32bit DMA in AHCI for Loongson 3., Borislav Petkov Re: [PATCH 09/14] ata: Use 32bit DMA in AHCI for Loongson 3., Huacai Chen Re: [PATCH 09/14] ata: Use 32bit DMA in AHCI for Loongson 3., Borislav Petkov <= [PATCH 10/14] drm/radeon: Make radeon card usable for Loongson., Huacai Chen Re: [PATCH 10/14] drm/radeon: Make radeon card usable for Loongson., LIU Qi [PATCH 11/14] ALSA: Make hda sound card usable for Loongson., Huacai Chen [PATCH 12/14] MIPS: Loongson 3: Add Loongson-3 SMP support., Huacai Chen [PATCH 13/14] MIPS: Loongson 3: Add CPU Hotplug support., Huacai Chen [PATCH 14/14] MIPS: Loongson: Add a Loongson 3 default config file., Huacai Chen Re: [PATCH 14/14] MIPS: Loongson: Add a Loongson 3 default config file., LIU Qi Re: [PATCH 14/14] MIPS: Loongson: Add a Loongson 3 default config file., huacai chen Re: [PATCH 00/14] MIPS: Add Loongson-3 based machines support., LIU Qi Re: [PATCH 00/14] MIPS: Add Loongson-3 based machines support., huacai chen

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