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From: Fredrik Noring <noring@nocrew.org>
To: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Cc: Robin Murphy <robin.murphy@arm.com>, "hch@lst.de" <hch@lst.de>,
	"stern@rowland.harvard.edu" <stern@rowland.harvard.edu>,
	"gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>,
	"linux-usb@vger.kernel.org" <linux-usb@vger.kernel.org>,
	"marex@denx.de" <marex@denx.de>,
	"JuergenUrban@gmx.de" <JuergenUrban@gmx.de>,
	Leo Li <leoyang.li@nxp.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [RFC PATCH v2 0/3] prerequisites for device reserved local mem rework
Date: Thu, 16 May 2019 15:47:25 +0200	[thread overview]
Message-ID: <20190516134725.GA53952@sx9> (raw)
In-Reply-To: <0fea5fa7-e2b0-b34d-3bf8-976007df2dc2@nxp.com>

Hi Laurentiu,

> > The kernel oopses with "unable to handle kernel paging request at virtual
> > address 000aba0b" in hcd_alloc_coherent via usb_hcd_map_urb_for_dma. 
> 
> By any chance, does this address looks like the dma_addr that the device 
> should target?

Yes, that looks like a typical device address suitable for its DMA.

> Actually, I think I'm misusing genalloc and also it appears that i need 
> to add a mapping on the phys address. So my plan is to change the 
> "unsigned long virt" to be the void * returned by the mapping operation 
> and the phys_addr_t be the dma_addr_t. I'll return with a patch.

Great, I'm happy to test your next patch revision.

Fredrik

  reply	other threads:[~2019-05-16 13:54 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-14 14:38 [RFC PATCH v2 0/3] prerequisites for device reserved local mem rework laurentiu.tudor
2019-05-14 14:38 ` [RFC PATCH v2 1/3] USB: use genalloc for USB HCs with local memory laurentiu.tudor
2019-05-14 14:42   ` Christoph Hellwig
2019-05-15  9:57     ` Laurentiu Tudor
2019-05-15 12:42       ` Christoph Hellwig
2019-05-14 14:38 ` [RFC PATCH v2 2/3] usb: host: ohci-sm501: init genalloc for " laurentiu.tudor
2019-05-14 14:38 ` [RFC PATCH v2 3/3] usb: host: ohci-tmio: " laurentiu.tudor
2019-05-14 15:17 ` [RFC PATCH v2 0/3] prerequisites for device reserved local mem rework Robin Murphy
2019-05-14 18:29   ` Fredrik Noring
2019-05-15 10:37     ` Laurentiu Tudor
2019-05-15 16:28       ` Fredrik Noring
2019-05-16  9:35         ` Laurentiu Tudor
2019-05-16 13:47           ` Fredrik Noring [this message]
2019-05-16 11:49         ` Laurentiu Tudor
2019-05-16 15:15           ` Fredrik Noring
2019-05-17 10:52             ` Laurentiu Tudor
2019-05-17 17:41               ` Fredrik Noring
2019-05-20 11:34                 ` Laurentiu Tudor
2019-05-20 15:41                   ` Fredrik Noring
2019-05-21 10:32                     ` hch

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