From: Guenter Roeck <linux@roeck-us.net>
To: Christoph Hellwig <hch@lst.de>
Cc: Krzysztof Kozlowski <krzk@kernel.org>,
Robin Murphy <robin.murphy@arm.com>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Rob Herring <robh+dt@kernel.org>,
Frank Rowand <frowand.list@gmail.com>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
Stefan Agner <stefan@agner.ch>, Fugang Duan <fugang.duan@nxp.com>
Subject: Re: [BUG BISECT] Ethernet fail on VF50 (OF: Don't set default coherent DMA mask)
Date: Sat, 28 Jul 2018 09:58:20 -0700 [thread overview]
Message-ID: <20180728165820.GA5731@roeck-us.net> (raw)
In-Reply-To: <20180727140448.GA29001@lst.de>
On Fri, Jul 27, 2018 at 04:04:48PM +0200, Christoph Hellwig wrote:
> On Fri, Jul 27, 2018 at 03:18:14PM +0200, Krzysztof Kozlowski wrote:
> > On 27 July 2018 at 15:11, Krzysztof Kozlowski <krzk@kernel.org> wrote:
> > > Hi,
> > >
> > > On today's next, the bisect pointed commit
> > > ff33d1030a6ca87cea9a41e1a2ea7750a781ab3d as fault for my boot failures
> > > with NFSv4 root on Toradex Colibri VF50 (Iris carrier board).
> > >
> > > Author: Robin Murphy <robin.murphy@arm.com>
> > > Date: Mon Jul 23 23:16:12 2018 +0100
> > > OF: Don't set default coherent DMA mask
> > >
> > > Board: Toradex Colibri VF50 (NXP VF500, Cortex A5, serial configured
> > > with DMA) on Iris Carrier.
> > >
> > > It looks like problem with Freescale Ethernet driver:
> > > [ 15.458477] fsl-edma 40018000.dma-controller: coherent DMA mask is unset
> > > [ 15.465284] fsl-lpuart 40027000.serial: Cannot prepare cyclic DMA
> > > [ 15.472086] Root-NFS: no NFS server address
> > > [ 15.476359] VFS: Unable to mount root fs via NFS, trying floppy.
> > > [ 15.484228] VFS: Cannot open root device "nfs" or
> > > unknown-block(2,0): error -6
> > > [ 15.491664] Please append a correct "root=" boot option; here are
> > > the available partitions:
> > > [ 15.500188] 0100 16384 ram0
> > > [ 15.500200] (driver?)
> > > [ 15.506406] Kernel panic - not syncing: VFS: Unable to mount root
> > > fs on unknown-block(2,0)
> > > [ 15.514747] ---[ end Kernel panic - not syncing: VFS: Unable to
> > > mount root fs on unknown-block(2,0) ]---
> > >
> > > Attached - defconfig and full boot log.
> > >
> > > Any hints?
> > > Let me know if you need any more information.
> >
> > My Exynos boards also fail to boot on missing network:
> > https://krzk.eu/#/builders/21/builds/799/steps/10/logs/serial0
> >
> > As expected there are plenty of "DMA mask not set" warnings... and
> > later dwc3 driver fails with:
> > dwc3: probe of 12400000.dwc3 failed with error -12
> > which is probably the answer why LAN attached to USB is not present.
>
> Looks like all the drivers failed to set a dma mask and were lucky.
I would call it a serious regression. Also, no longer setting a default
coherent DMA mask is a quite substantial behavioral change, especially
if and since the code worked just fine up to now.
Crash when booting sam460ex attached below, as is a bisect log.
Guenter
---
irq: type mismatch, failed to map hwirq-0 for interrupt-controller3!
WARNING: CPU: 0 PID: 1 at ppc4xx_msi_probe+0x2dc/0x3b8
Modules linked in:
CPU: 0 PID: 1 Comm: swapper Not tainted 4.18.0-rc6-00010-gff33d1030a6c #1
NIP: c001c460 LR: c001c29c CTR: 00000000
REGS: cf82db60 TRAP: 0700 Not tainted (4.18.0-rc6-00010-gff33d1030a6c)
MSR: 00029000 <CE,EE,ME> CR: 24002028 XER: 00000000
GPR00: c001c29c cf82dc10 cf828000 d1021000 d1021000 cf882108 cf82db78 00000000
GPR08: 00000000 c0377ae4 00000000 1000051b 24002028 00000000 c00025e8 00000000
GPR16: 00000000 00000000 00000000 00000000 00000000 00000000 c0492380 0000004a
GPR24: 00029000 0000000c 10000000 cf8de410 c0494d60 00029000 cf8bebc0 cf8de400
NIP [c001c460] ppc4xx_msi_probe+0x2dc/0x3b8
LR [c001c29c] ppc4xx_msi_probe+0x118/0x3b8
Call Trace:
[cf82dc10] [c001c29c] ppc4xx_msi_probe+0x118/0x3b8 (unreliable)
[cf82dc70] [c0209fbc] platform_drv_probe+0x40/0x9c
[cf82dc90] [c0208240] driver_probe_device+0x2a8/0x350
[cf82dcc0] [c0206204] bus_for_each_drv+0x60/0xac
[cf82dcf0] [c0207e88] __device_attach+0xe8/0x160
[cf82dd20] [c02071e0] bus_probe_device+0xa0/0xbc
[cf82dd40] [c02050c8] device_add+0x404/0x5c4
[cf82dd90] [c0288978] of_platform_device_create_pdata+0x88/0xd8
[cf82ddb0] [c0288b70] of_platform_bus_create+0x134/0x220
[cf82de10] [c0288bcc] of_platform_bus_create+0x190/0x220
[cf82de70] [c0288cf4] of_platform_bus_probe+0x98/0xec
[cf82de90] [c0449650] __machine_initcall_canyonlands_ppc460ex_device_probe+0x38/0x54
[cf82dea0] [c0002404] do_one_initcall+0x40/0x188
[cf82df00] [c043daec] kernel_init_freeable+0x130/0x1d0
[cf82df30] [c0002600] kernel_init+0x18/0x104
[cf82df40] [c000c23c] ret_from_kernel_thread+0x14/0x1c
Instruction dump:
3860000e 4bffa2a5 3860000f 7f44d378 4bffa299 4bfffe30 3860000e 4bffa28d
3860000f 7f24cb78 4bffa281 4bfffde4 <0fe00000> 81290000 2f890000 409efe6c
---[ end trace 8cf551077ecfc429 ]---
ppc4xx-msi c10000000.ppc4xx-msi: coherent DMA mask is unset
Unable to handle kernel paging request for data at address 0x00000000
Faulting instruction address: 0xc001bff0
Oops: Kernel access of bad area, sig: 11 [#1]
BE Canyonlands
Modules linked in:
CPU: 0 PID: 1 Comm: swapper Tainted: G W 4.18.0-rc6-00010-gff33d1030a6c #1
NIP: c001bff0 LR: c001c418 CTR: c01faa7c
REGS: cf82db40 TRAP: 0300 Tainted: G W (4.18.0-rc6-00010-gff33d1030a6c)
MSR: 00029000 <CE,EE,ME> CR: 28002024 XER: 00000000
DEAR: 00000000 ESR: 00000000
GPR00: c001c418 cf82dbf0 cf828000 cf8de400 00000000 00000000 000000c4 000000c4
GPR08: c0481ea4 00000000 00000000 000000c4 22002024 00000000 c00025e8 00000000
GPR16: 00000000 00000000 00000000 00000000 00000000 00000000 c0492380 0000004a
GPR24: 00029000 0000000c 00000000 cf8de410 c0494d60 c0494d60 cf8bebc0 00000001
NIP [c001bff0] ppc4xx_of_msi_remove+0x48/0xa0
LR [c001c418] ppc4xx_msi_probe+0x294/0x3b8
Call Trace:
[cf82dbf0] [00029000] 0x29000 (unreliable)
[cf82dc10] [c001c418] ppc4xx_msi_probe+0x294/0x3b8
[cf82dc70] [c0209fbc] platform_drv_probe+0x40/0x9c
[cf82dc90] [c0208240] driver_probe_device+0x2a8/0x350
[cf82dcc0] [c0206204] bus_for_each_drv+0x60/0xac
[cf82dcf0] [c0207e88] __device_attach+0xe8/0x160
[cf82dd20] [c02071e0] bus_probe_device+0xa0/0xbc
[cf82dd40] [c02050c8] device_add+0x404/0x5c4
[cf82dd90] [c0288978] of_platform_device_create_pdata+0x88/0xd8
[cf82ddb0] [c0288b70] of_platform_bus_create+0x134/0x220
[cf82de10] [c0288bcc] of_platform_bus_create+0x190/0x220
[cf82de70] [c0288cf4] of_platform_bus_probe+0x98/0xec
[cf82de90] [c0449650] __machine_initcall_canyonlands_ppc460ex_device_probe+0x38/0x54
[cf82dea0] [c0002404] do_one_initcall+0x40/0x188
[cf82df00] [c043daec] kernel_init_freeable+0x130/0x1d0
[cf82df30] [c0002600] kernel_init+0x18/0x104
[cf82df40] [c000c23c] ret_from_kernel_thread+0x14/0x1c
Instruction dump:
90010024 813d0024 2f890000 83c30058 41bd0014 48000038 813d0024 7f89f800
409d002c 813e000c 57ea103a 3bff0001 <7c69502e> 2f830000 419effe0 4803b26d
---[ end trace 8cf551077ecfc42a ]---
Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
---
# bad: [639d109b21f1413c54ca7042e40a57856e7679bb] Add linux-next specific files for 20180727
# good: [d72e90f33aa4709ebecc5005562f52335e106a60] Linux 4.18-rc6
git bisect start 'HEAD' 'v4.18-rc6'
# bad: [7bc81125a936a25af28f2172b593bca390b0c539] Merge remote-tracking branch 'spi-nor/spi-nor/next'
git bisect bad 7bc81125a936a25af28f2172b593bca390b0c539
# bad: [659868e6488dbad1181ad21888521ff41ae45f65] Merge remote-tracking branch 'vfs/for-next'
git bisect bad 659868e6488dbad1181ad21888521ff41ae45f65
# bad: [453ff4bb24c3fa4af40995f2615ec22176e71500] Merge remote-tracking branch 'mvebu/for-next'
git bisect bad 453ff4bb24c3fa4af40995f2615ec22176e71500
# good: [ebc949ee3c7e28b6554f00fcdaf2c0c8aae54d90] Merge branch 'next/soc' into for-next
git bisect good ebc949ee3c7e28b6554f00fcdaf2c0c8aae54d90
# good: [fef31ecbe2ecbb518ad1db37282eb97ca6dd29b8] Merge remote-tracking branch 'leaks/leaks-next'
git bisect good fef31ecbe2ecbb518ad1db37282eb97ca6dd29b8
# good: [53b9c41f0d9c35e41ea884bae6ad4b6fadc59035] Merge branch 'next/drivers' into for-next
git bisect good 53b9c41f0d9c35e41ea884bae6ad4b6fadc59035
# bad: [cd67b2d4c0ca61f7e93e622dba0164fb176975b4] Merge remote-tracking branch 'arm-soc/for-next'
git bisect bad cd67b2d4c0ca61f7e93e622dba0164fb176975b4
# good: [a0c166140d2e63a069263b6d3c39a42c61749d96] Merge branch 'next/drivers' into for-next
git bisect good a0c166140d2e63a069263b6d3c39a42c61749d96
# bad: [e5e08751da47170e6a05c09364595ec1abad7cec] Merge remote-tracking branch 'arm/for-next'
git bisect bad e5e08751da47170e6a05c09364595ec1abad7cec
# good: [52e19c3c1eaf103c2eb4f764825136abcfea1538] Merge branches 'clkdev', 'fixes', 'misc' and 'spectre' into for-next
git bisect good 52e19c3c1eaf103c2eb4f764825136abcfea1538
# good: [e8d4162413ecbf3b3d1451808bdbd212cec8b70c] ACPI/IORT: Set bus DMA mask as appropriate
git bisect good e8d4162413ecbf3b3d1451808bdbd212cec8b70c
# good: [186e2e8cc462aed36cc6845c938547833377582f] ACPI/IORT: Don't set default coherent DMA mask
git bisect good 186e2e8cc462aed36cc6845c938547833377582f
# bad: [deff076d4ce359c2d83983a75765b4ac8f635d2f] Merge remote-tracking branch 'dma-mapping/for-next'
git bisect bad deff076d4ce359c2d83983a75765b4ac8f635d2f
# bad: [ff33d1030a6ca87cea9a41e1a2ea7750a781ab3d] OF: Don't set default coherent DMA mask
git bisect bad ff33d1030a6ca87cea9a41e1a2ea7750a781ab3d
# first bad commit: [ff33d1030a6ca87cea9a41e1a2ea7750a781ab3d] OF: Don't set default coherent DMA mask
next prev parent reply other threads:[~2018-07-28 16:58 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-27 13:11 [BUG BISECT] Ethernet fail on VF50 (OF: Don't set default coherent DMA mask) Krzysztof Kozlowski
2018-07-27 13:18 ` Krzysztof Kozlowski
2018-07-27 14:04 ` Christoph Hellwig
2018-07-28 16:58 ` Guenter Roeck [this message]
2018-07-30 9:23 ` Christoph Hellwig
2018-07-30 14:38 ` Robin Murphy
2018-07-31 0:50 ` Guenter Roeck
2018-07-31 8:19 ` Stefan Agner
2018-07-31 12:32 ` Robin Murphy
2018-07-31 13:26 ` Guenter Roeck
2018-07-31 14:09 ` Robin Murphy
2018-07-31 15:43 ` Guenter Roeck
2018-07-31 15:58 ` Robin Murphy
2018-07-31 17:38 ` Guenter Roeck
2018-08-01 16:33 ` Robin Murphy
2018-08-01 18:23 ` Guenter Roeck
2018-07-31 15:53 ` Stefan Agner
2018-07-31 16:29 ` Robin Murphy
2018-07-31 19:02 ` Stefan Agner
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=20180728165820.GA5731@roeck-us.net \
--to=linux@roeck-us.net \
--cc=ard.biesheuvel@linaro.org \
--cc=devicetree@vger.kernel.org \
--cc=frowand.list@gmail.com \
--cc=fugang.duan@nxp.com \
--cc=hch@lst.de \
--cc=krzk@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=robh+dt@kernel.org \
--cc=robin.murphy@arm.com \
--cc=stefan@agner.ch \
/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).