From: Stanislaw Gruszka <sgruszka@redhat.com>
To: Stefan Wahren <stefan.wahren@i2se.com>
Cc: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>,
Felix Fietkau <nbd@nbd.name>,
Doug Anderson <dianders@chromium.org>,
Minas Harutyunyan <hminas@synopsys.com>,
linux-wireless <linux-wireless@vger.kernel.org>,
linux-usb@vger.kernel.org
Subject: [BUG] mt76x0u: Probing issues on Raspberry Pi 3 B+
Date: Mon, 11 Feb 2019 18:22:41 +0100 [thread overview]
Message-ID: <20190211172240.GD6292@redhat.com> (raw)
On Mon, Feb 11, 2019 at 04:27:40PM +0100, Stefan Wahren wrote:
> >> All my results refers to the mainline kernel we all should talk about. I
> >> started a gist which try to describe the mainline variant:
> >> https://gist.github.com/lategoodbye/c7317a42bf7f9c07f5a91baed8c68f75
> > So to summarize:
> > - Raspberry Pi Foundation kernel works just with RFC series
> > - mainline kernel works out of the box
> >
> > is my understanding correct?
>
> not really.
>
> Compiling the mainline kernel with arm/multi_v7_defconfig it works.
> Using the same kernel but with arm64/defconfig doesn't work. But i don't
> think this is a 32/64 bit issue. The arm64 defconfig is much more
> complex (e.g. enables more IOMMU stuff).
One possible thing that could be broken with IOMMU is allocating
big buffers via page_fraq_alloc(). Theoretically that should work,
but who knows. You can check my patch posted recently, it make
the driver stop doing big allocations via page_frag_alloc():
https://lore.kernel.org/linux-wireless/1549872974-7268-1-git-send-email-sgruszka@redhat.com/
Stanislaw
WARNING: multiple messages have this Message-ID (diff)
From: Stanislaw Gruszka <sgruszka@redhat.com>
To: Stefan Wahren <stefan.wahren@i2se.com>
Cc: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>,
Felix Fietkau <nbd@nbd.name>,
Doug Anderson <dianders@chromium.org>,
Minas Harutyunyan <hminas@synopsys.com>,
linux-wireless <linux-wireless@vger.kernel.org>,
linux-usb@vger.kernel.org
Subject: Re: [BUG] mt76x0u: Probing issues on Raspberry Pi 3 B+
Date: Mon, 11 Feb 2019 18:22:41 +0100 [thread overview]
Message-ID: <20190211172240.GD6292@redhat.com> (raw)
In-Reply-To: <500c0d4a-611a-1b00-5ea4-7368e5e9f1e9@i2se.com>
On Mon, Feb 11, 2019 at 04:27:40PM +0100, Stefan Wahren wrote:
> >> All my results refers to the mainline kernel we all should talk about. I
> >> started a gist which try to describe the mainline variant:
> >> https://gist.github.com/lategoodbye/c7317a42bf7f9c07f5a91baed8c68f75
> > So to summarize:
> > - Raspberry Pi Foundation kernel works just with RFC series
> > - mainline kernel works out of the box
> >
> > is my understanding correct?
>
> not really.
>
> Compiling the mainline kernel with arm/multi_v7_defconfig it works.
> Using the same kernel but with arm64/defconfig doesn't work. But i don't
> think this is a 32/64 bit issue. The arm64 defconfig is much more
> complex (e.g. enables more IOMMU stuff).
One possible thing that could be broken with IOMMU is allocating
big buffers via page_fraq_alloc(). Theoretically that should work,
but who knows. You can check my patch posted recently, it make
the driver stop doing big allocations via page_frag_alloc():
https://lore.kernel.org/linux-wireless/1549872974-7268-1-git-send-email-sgruszka@redhat.com/
Stanislaw
next reply other threads:[~2019-02-11 17:22 UTC|newest]
Thread overview: 110+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-11 17:22 Stanislaw Gruszka [this message]
2019-02-11 17:22 ` [BUG] mt76x0u: Probing issues on Raspberry Pi 3 B+ Stanislaw Gruszka
-- strict thread matches above, loose matches on Subject: below --
2019-03-03 21:16 Stefan Wahren
2019-03-03 21:16 ` Stefan Wahren
2019-02-20 16:36 Lorenzo Bianconi
2019-02-20 16:36 ` Lorenzo Bianconi
2019-02-20 16:32 Stanislaw Gruszka
2019-02-20 16:32 ` Stanislaw Gruszka
2019-02-20 16:22 Lorenzo Bianconi
2019-02-20 16:22 ` Lorenzo Bianconi
2019-02-20 16:14 Stanislaw Gruszka
2019-02-20 16:14 ` Stanislaw Gruszka
2019-02-20 15:25 Alan Stern
2019-02-20 15:25 ` Alan Stern
2019-02-20 13:22 Lorenzo Bianconi
2019-02-20 13:22 ` Lorenzo Bianconi
2019-02-20 13:00 Stanislaw Gruszka
2019-02-20 13:00 ` Stanislaw Gruszka
2019-02-20 10:20 Stanislaw Gruszka
2019-02-20 10:20 ` Stanislaw Gruszka
2019-02-19 17:02 Stefan Wahren
2019-02-19 17:02 ` Stefan Wahren
2019-02-19 15:40 Alan Stern
2019-02-19 15:40 ` Alan Stern
2019-02-19 12:19 Felix Fietkau
2019-02-19 12:19 ` Felix Fietkau
2019-02-19 12:11 Felix Fietkau
2019-02-19 12:11 ` Felix Fietkau
2019-02-19 10:59 Stanislaw Gruszka
2019-02-19 10:59 ` Stanislaw Gruszka
2019-02-19 10:42 Stanislaw Gruszka
2019-02-19 10:42 ` Stanislaw Gruszka
2019-02-18 22:19 Stefan Wahren
2019-02-18 22:19 ` Stefan Wahren
2019-02-18 18:52 Felix Fietkau
2019-02-18 18:52 ` Felix Fietkau
2019-02-18 15:03 Stanislaw Gruszka
2019-02-18 15:03 ` Stanislaw Gruszka
2019-02-18 14:47 Stanislaw Gruszka
2019-02-18 14:47 ` Stanislaw Gruszka
2019-02-18 14:43 Felix Fietkau
2019-02-18 14:43 ` Felix Fietkau
2019-02-18 14:25 Lorenzo Bianconi
2019-02-18 14:25 ` Lorenzo Bianconi
2019-02-18 13:52 Stanislaw Gruszka
2019-02-18 13:52 ` Stanislaw Gruszka
2019-02-16 19:17 Stefan Wahren
2019-02-16 19:17 ` Stefan Wahren
2019-02-16 14:07 Stanislaw Gruszka
2019-02-16 14:07 ` Stanislaw Gruszka
2019-02-16 11:05 Stefan Wahren
2019-02-16 11:05 ` Stefan Wahren
2019-02-15 7:12 Stanislaw Gruszka
2019-02-15 7:12 ` Stanislaw Gruszka
2019-02-14 9:54 Stanislaw Gruszka
2019-02-14 9:54 ` Stanislaw Gruszka
2019-02-14 9:48 Stefan Wahren
2019-02-14 9:48 ` Stefan Wahren
2019-02-14 9:25 Stanislaw Gruszka
2019-02-14 9:25 ` Stanislaw Gruszka
2019-02-14 6:49 Stefan Wahren
2019-02-14 6:49 ` Stefan Wahren
2019-02-13 7:05 Stefan Wahren
2019-02-13 7:05 ` Stefan Wahren
2019-02-12 15:27 Alan Stern
2019-02-12 15:27 ` Alan Stern
2019-02-12 13:15 Stanislaw Gruszka
2019-02-12 13:15 ` Stanislaw Gruszka
2019-02-12 11:58 Lorenzo Bianconi
2019-02-12 11:58 ` Lorenzo Bianconi
2019-02-12 9:30 Stanislaw Gruszka
2019-02-12 9:30 ` Stanislaw Gruszka
2019-02-12 0:06 Lorenzo Bianconi
2019-02-12 0:06 ` Lorenzo Bianconi
2019-02-11 17:49 Alan Stern
2019-02-11 17:33 Stanislaw Gruszka
2019-02-11 15:57 Lorenzo Bianconi
2019-02-11 15:57 ` Lorenzo Bianconi
2019-02-11 15:27 Stefan Wahren
2019-02-11 15:27 ` Stefan Wahren
2019-02-11 15:12 Alan Stern
2019-02-11 15:10 Lorenzo Bianconi
2019-02-11 15:10 ` Lorenzo Bianconi
2019-02-11 14:04 Stefan Wahren
2019-02-11 14:04 ` Stefan Wahren
2019-02-11 11:06 Lorenzo Bianconi
2019-02-11 11:06 ` Lorenzo Bianconi
2019-02-11 10:33 Stefan Wahren
2019-02-11 10:33 ` Stefan Wahren
2019-02-11 10:04 Lorenzo Bianconi
2019-02-11 10:04 ` Lorenzo Bianconi
2019-02-11 7:44 Stanislaw Gruszka
2019-02-11 7:44 ` Stanislaw Gruszka
2019-02-10 17:39 Lorenzo Bianconi
2019-02-10 17:39 ` Lorenzo Bianconi
2019-02-10 10:22 Lorenzo Bianconi
2019-02-10 10:22 ` Lorenzo Bianconi
2019-02-10 9:41 Stanislaw Gruszka
2019-02-10 9:41 ` Stanislaw Gruszka
2019-02-09 12:08 Stefan Wahren
2019-02-09 18:46 ` Lorenzo Bianconi
2019-02-09 20:29 ` Stefan Wahren
2019-02-09 20:33 ` Lorenzo Bianconi
2019-02-09 22:47 ` Stefan Wahren
2019-02-10 9:29 ` Stanislaw Gruszka
2019-02-10 16:38 ` Stefan Wahren
2019-02-10 16:52 ` Lorenzo Bianconi
2019-02-11 7:50 ` Stanislaw Gruszka
2019-02-11 8:08 ` Stefan Wahren
2019-02-11 9:52 ` Lorenzo Bianconi
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=20190211172240.GD6292@redhat.com \
--to=sgruszka@redhat.com \
--cc=dianders@chromium.org \
--cc=hminas@synopsys.com \
--cc=linux-usb@vger.kernel.org \
--cc=linux-wireless@vger.kernel.org \
--cc=lorenzo.bianconi@redhat.com \
--cc=nbd@nbd.name \
--cc=stefan.wahren@i2se.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.