Re: [PATCH] ARM: MMU: fix wrong dma_flush_range in arm_create_pte()

[Giorgio Dal Molin <giorgio.nicole@arcor.de>]

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Hi,

On 8/15/18 6:55 PM, Andrey Smirnov wrote:
> On Wed, Aug 15, 2018 at 6:49 AM Sascha Hauer <s.hauer@pengutronix.de> wrote:
>>
>> On Wed, Aug 15, 2018 at 03:46:59PM +0200, Sascha Hauer wrote:
>>> Since 7ba0f2d299 arm_create_pte() flushes the page table entries itself
>>> and it's no longer done in arch_remap_range(). Unfortunately it does
>>> not flush the modified 1st level page table entry, but instead the base
>>> of the page table. Fix it up.
>>>
>>> Fixes: 7ba0f2d299 ARM: mmu: fix cache flushing when replacing a section with a PTE
>>
>> Since the patch breaking it was the reason for creating v2018.07.1, this
>> will be a reason for creating v2018.07.2 (and also v2018.08.1)
>>
>> I noticed misbehaviour when trying to sue network on a i.MX53 based
>> board, here we got tronsmission timeouts. These are fixed with this patch
>>
> 
> Heh, you beat me to it by a couple of hours! I came up with the same
> patch debugging networking (and various others) issues on i.MX51 last
> night and was about to submit it.
> 
> Thanks,
> Andrey Smirnov
> 
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I can also confirm this network problem on an imx7d soc.

Tomorrow I will test the patch.

giorgio


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