From: Eugeniy Paltsev <eugeniy.paltsev@synopsys.com>
To: "hch@lst.de" <hch@lst.de>,
Vineet Gupta <vineet.gupta1@synopsys.com>,
"iommu@lists.linux-foundation.org"
<iommu@lists.linux-foundation.org>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-s390@vger.kernel.org" <linux-s390@vger.kernel.org>,
"linux-xtensa@linux-xtensa.org" <linux-xtensa@linux-xtensa.org>,
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Subject: Re: ensure dma_alloc_coherent always returns zeroed memory
Date: Thu, 20 Dec 2018 14:32:52 +0000 [thread overview]
Message-ID: <1545316369.14089.20.camel@synopsys.com> (raw)
In-Reply-To: <20181219165939.GA26087@lst.de>
Hi Christoph,
I test kernel from your 'dma-alloc-always-zero' branch, and as
I can see we have DMA peripherals (like USB) broken.
There are the errors example I got during USB initializing:
------------------------------>8--------------------------------
usb 1-1: device descriptor read/64, error -110
usb usb1-port1: attempt power cycle
usb 1-1: new high-speed USB device number 4 using ehci-platform
usb 1-1: device descriptor read/64, error -110
usb 1-1: device descriptor read/64, error -110
usb 1-1: new high-speed USB device number 5 using ehci-platform
usb 1-1: device descriptor read/64, error -110
usb 1-1: device descriptor read/64, error -110
usb usb1-port1: unable to enumerate USB device
usb 2-1: new full-speed USB device number 2 using ohci-platform
usb 2-1: device descriptor read/all, error -84
usb 2-1: new full-speed USB device number 3 using ohci-platform
usb 2-1: device descriptor read/all, error -84
usb usb2-port1: attempt power cycle
usb 2-1: new full-speed USB device number 4 using ohci-platform
usb 2-1: device descriptor read/8, error -62
usb 2-1: device descriptor read/8, error -62
usb 2-1: new full-speed USB device number 5 using ohci-platform
usb 2-1: device descriptor read/8, error -84
usb 2-1: device descriptor read/8, error -84
usb usb2-port1: unable to enumerate USB device
[snip]
------------------------------8<--------------------------------
On Wed, 2018-12-19 at 17:59 +0100, Christoph Hellwig wrote:
> FYI, I've picked this up for dma-mapping for-next now.
>
> _______________________________________________
> linux-snps-arc mailing list
> linux-snps-arc@lists.infradead.org
> https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.infradead.org_mailman_listinfo_linux-2Dsnps-2Darc&d=DwICAg&c=DPL6_X_6JkXFx7AXWqB0tg&r=ZlJN
> 1MriPUTkBKCrPSx67GmaplEUGcAEk9yPtCLdUXI&m=naBCT96A4RSQJLzBWzuCcmptFGiQDfFTOWJpprqDIVk&s=cHF84va89ofP6VlrV683ewENUXdaLW7opamLZSkZBgk&e=
--
Eugeniy Paltsev
next prev parent reply other threads:[~2018-12-20 14:33 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-14 8:25 ensure dma_alloc_coherent always returns zeroed memory Christoph Hellwig
2018-12-14 8:25 ` [PATCH 1/2] dma-mapping: zero memory returned from dma_alloc_* Christoph Hellwig
2018-12-14 9:54 ` Geert Uytterhoeven
2018-12-14 9:55 ` Geert Uytterhoeven
2018-12-14 11:47 ` Christoph Hellwig
2018-12-14 12:36 ` Geert Uytterhoeven
2018-12-14 14:14 ` Greg Ungerer
2018-12-17 11:59 ` Christoph Hellwig
2018-12-14 12:12 ` Eugeniy Paltsev
2018-12-14 12:21 ` hch
2018-12-14 18:10 ` Sam Ravnborg
2018-12-14 18:35 ` Christoph Hellwig
2018-12-14 8:25 ` [PATCH 2/2] dma-mapping: deprecate dma_zalloc_coherent Christoph Hellwig
2018-12-14 13:33 ` ensure dma_alloc_coherent always returns zeroed memory Christoph Hellwig
2018-12-19 16:59 ` Christoph Hellwig
2018-12-20 14:32 ` Eugeniy Paltsev [this message]
2018-12-20 14:34 ` hch
2018-12-20 14:39 ` Eugeniy Paltsev
2018-12-20 14:46 ` hch
2018-12-20 17:37 ` hch
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