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Re: [PATCH 1/1] hw/ide/core: terminate in-flight DMA on IDE bus reset
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From: |
Fiona Ebner |
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Subject: |
Re: [PATCH 1/1] hw/ide/core: terminate in-flight DMA on IDE bus reset |
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Date: |
Tue, 26 Sep 2023 09:11:41 +0200 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.15.0 |
Am 25.09.23 um 21:53 schrieb John Snow:
> On Thu, Sep 21, 2023 at 12:07 PM Simon Rowe <simon.rowe@nutanix.com> wrote:
>>
>> When an IDE controller is reset, its internal state is being cleared
>> before any outstanding I/O is cancelled. If a response to DMA is
>> received in this window, the aio callback will incorrectly continue
>> with the next part of the transfer (now using sector 0 from
>> the cleared controller state).
>
> Eugh, yikes. It feels like we should fix the cancellation ...
Please note that there already is a patch for that on the list:
https://lists.nongnu.org/archive/html/qemu-devel/2023-09/msg01011.html
Best Regards,
Fiona