From: Hans de Goede <hdegoede@redhat.com>
To: Greg KH <gregkh@linuxfoundation.org>
Cc: Tom Yan <tom.ty89@gmail.com>,
Alan Stern <stern@rowland.harvard.edu>,
Christoph Hellwig <hch@lst.de>,
linux-usb <linux-usb@vger.kernel.org>,
Mathias Nyman <mathias.nyman@intel.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-pci@vger.kernel.org, Lu Baolu <baolu.lu@linux.intel.com>
Subject: Re: [PATCH 2/2] usb-storage: revert from scsi_add_host_with_dma() to scsi_add_host()
Date: Mon, 30 Nov 2020 14:55:45 +0100 [thread overview]
Message-ID: <70ca74c2-4a80-e25b-eca9-a63a75516673@redhat.com> (raw)
In-Reply-To: <X8T5bimon2oaUUqI@kroah.com>
Hi,
On 11/30/20 2:53 PM, Greg KH wrote:
> On Mon, Nov 30, 2020 at 02:36:38PM +0100, Hans de Goede wrote:
>> Hi,
>>
>> On 11/30/20 2:30 PM, Greg KH wrote:
>>> On Mon, Nov 30, 2020 at 02:23:48PM +0100, Hans de Goede wrote:
>>>> Hi,
>>>>
>>>> On 11/30/20 1:58 PM, Tom Yan wrote:
>>>>> It's merely a moving of comment moving for/and a no-behavioral-change
>>>>> adaptation for the reversion.>
>>>>
>>>> IMHO the revert of the troublesome commit and the other/new changes really
>>>> should be 2 separate commits. But I will let Alan and Greg have the final
>>>> verdict on this.
>>>
>>> I would prefer to just revert the commits and not do anything
>>> different/special here so late in the release cycle.
>>>
>>> So, if Alan agrees, I'll be glad to do them on my end, I just need the
>>> commit ids for them.
>>
>> The troublesome commit are (in reverse, so revert, order):
>>
>> 5df7ef7d32fe ("uas: bump hw_max_sectors to 2048 blocks for SS or faster drives")
>> 558033c2828f ("uas: fix sdev->host->dma_dev")
>> 0154012f8018 ("usb-storage: fix sdev->host->dma_dev")
>>
>> Alan, the reason for reverting these is that using scsi_add_host_with_dma() as the
>> last 2 patches do, with the dmadev argument of that call pointing to the device
>> for the XHCI controller is causing changes to the DMA settings of the XHCI controller
>> itself which is causing regressions in 5.10, see this email thread:
>>
>> https://lore.kernel.org/linux-usb/fde7e11f-5dfc-8348-c134-a21cb1116285@redhat.com/T/#t
>
> Thanks, I'll wait for Alan to respond, but I think just reverting these
> is the best solution at this point in time. You have tested those
> reverts, solve this, right? If so, can I get a "Tested-by:"?
Yes that was my first solution to this problem and I can confirm that that fixes
the regression:
Tested-by: Hans de Goede <hdegoede@redhat.com>
Regards,
Hans
next prev parent reply other threads:[~2020-11-30 13:57 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-10 11:36 5.10 regression, many XHCI swiotlb buffer is full / DMAR: Device bounce map failed errors on thunderbolt connected XHCI controller Hans de Goede
2020-11-18 21:43 ` Hans de Goede
2020-11-23 14:49 ` Hans de Goede
2020-11-24 10:27 ` Christoph Hellwig
2020-11-24 10:31 ` Hans de Goede
2020-11-24 12:17 ` Mathias Nyman
2020-11-27 11:41 ` Hans de Goede
2020-11-27 12:32 ` 5.10 regression caused by: "uas: fix sdev->host->dma_dev": " Hans de Goede
2020-11-27 16:19 ` Christoph Hellwig
2020-11-27 18:12 ` Hans de Goede
2020-11-28 1:25 ` Tom Yan
2020-11-28 10:43 ` Hans de Goede
2020-11-28 15:48 ` [PATCH 1/2] uas: revert from scsi_add_host_with_dma() to scsi_add_host() Tom Yan
2020-11-28 15:48 ` [PATCH 2/2] usb-storage: " Tom Yan
2020-11-30 9:50 ` Hans de Goede
2020-11-30 12:58 ` Tom Yan
2020-11-30 13:23 ` Hans de Goede
2020-11-30 13:30 ` Greg KH
2020-11-30 13:36 ` Hans de Goede
2020-11-30 13:53 ` Greg KH
2020-11-30 13:55 ` Hans de Goede [this message]
2020-12-04 15:02 ` Greg KH
2020-11-30 17:20 ` Alan Stern
2020-11-30 17:24 ` Christoph Hellwig
2020-11-30 18:18 ` Hans de Goede
2020-11-30 18:57 ` Tom Yan
2020-11-30 19:01 ` Tom Yan
2020-11-30 20:36 ` Alan Stern
2021-02-25 16:35 ` Alan Stern
2021-02-26 5:53 ` Christoph Hellwig
2021-03-01 15:59 ` Alan Stern
2020-11-30 14:39 ` Tom Yan
2020-11-30 9:48 ` [PATCH 1/2] uas: " Hans de Goede
2020-11-30 19:30 ` Tom Yan
2020-12-01 11:09 ` Hans de Goede
2020-11-28 17:15 ` 5.10 regression caused by: "uas: fix sdev->host->dma_dev": many XHCI swiotlb buffer is full / DMAR: Device bounce map failed errors on thunderbolt connected XHCI controller Christoph Hellwig
2020-11-30 8:43 ` Hans de Goede
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=70ca74c2-4a80-e25b-eca9-a63a75516673@redhat.com \
--to=hdegoede@redhat.com \
--cc=baolu.lu@linux.intel.com \
--cc=gregkh@linuxfoundation.org \
--cc=hch@lst.de \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pci@vger.kernel.org \
--cc=linux-usb@vger.kernel.org \
--cc=mathias.nyman@intel.com \
--cc=stern@rowland.harvard.edu \
--cc=tom.ty89@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).