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Date: Fri, 18 Dec 2015 07:48:07 -0400
From: Julian Margetson <runaway@...dw.ms>
To: Måns Rullgård <mans@...sr.com>
Cc: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
Tejun Heo <tj@...nel.org>, linux-ide@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find
dma channel
On 12/17/2015 8:06 PM, Måns Rullgård wrote:
> Julian Margetson <runaway@...dw.ms> writes:
>
>> On 12/17/2015 3:53 PM, Måns Rullgård wrote:
>>> Julian Margetson <runaway@...dw.ms> writes:
>>>
>>>> On 12/17/2015 2:51 PM, Måns Rullgård wrote:
>>>>> Julian Margetson <runaway@...dw.ms> writes:
>>>>>
>>>>>> On 12/17/2015 1:59 PM, Måns Rullgård wrote:
>>>>>>> Julian Margetson <runaway@...dw.ms> writes:
>>>>>>>
>>>>>>>> I have been running my machine mostly configured for pciex1 thus with
>>>>>>>> the sata_dwc disabled.
>>>>>>>> The changes to sata_dwc-460ex do cause an oops.
>>>>>>>> I will try to give more detailed info over this weekend .
>>>>>>> The driver as is upstream would do that since it unconditionally
>>>>>>> dereferences a null pointer in the probe function. My patch fixes that
>>>>>>> as a side-effect.
>>>>>>>
>>>>>> patching file drivers/ata/Kconfig
>>>>>>
>>>>>> Hunk #1 FAILED at 296.
>>>>> [...]
>>>>>
>>>>>> root@...ian-VirtualBox:/usr/src/linux-3.18.25#
>>>>> The patch is against 4.4-rc5.
>>>>>
>>>> CC drivers/ata/sata_dwc_460ex.o
>>>>
>>>> drivers/ata/sata_dwc_460ex.c:198:15: error: variable ‘sata_dwc_dma_dws’ has initializer but incomplete type
>>>>
>>>> static struct dw_dma_slave sata_dwc_dma_dws = {
>>>> ^
>>> It builds, albeit with an unrelated warning, using the attached config.
>>> Maybe there's a missing config dependency somewhere.
>>>
>> I am attempting to cross compile under Ubuntu 14.04 X86 in Virtualbox
>> with your .config.
>> 4.4.0-rc5 builds ok with no patches applied .
>> Once your patch is applied it fails to build .
>>
>> CC drivers/ata/sata_dwc_460ex.o
>> drivers/ata/sata_dwc_460ex.c:198:15: error: variable ‘sata_dwc_dma_dws’ has initializer but incomplete type
>> static struct dw_dma_slave sata_dwc_dma_dws = {
>> ^
> Bizarre. This is what it looks like here:
>
> mru@...corn:/tmp/linux-sata$ git status
> On branch sata-dwc
> nothing to commit, working directory clean
> mru@...corn:/tmp/linux-sata$ git describe
> v4.4-rc5
> mru@...corn:/tmp/linux-sata$ sha1sum /tmp/0001-ata-sata_dwc_460ex-use-dmas-DT-property-to-find-dma-.patch
> e300971aa483390f82de2e9120dc16e460e74feb /tmp/0001-ata-sata_dwc_460ex-use-dmas-DT-property-to-find-dma-.patch
> mru@...corn:/tmp/linux-sata$ git am /tmp/0001-ata-sata_dwc_460ex-use-dmas-DT-property-to-find-dma-.patch
> Applying: ata: sata_dwc_460ex: use "dmas" DT property to find dma channel
> mru@...corn:/tmp/linux-sata$ sha1sum .config
> 4e7615b8d2fa9a1c4b4ae9ffc363aefcaf3789ca .config
> mru@...corn:/tmp/linux-sata$ make ARCH=powerpc CROSS_COMPILE=powerpc64-none-linux-gnu- oldconfig
> HOSTCC scripts/basic/fixdep
> HOSTCC scripts/kconfig/conf.o
> SHIPPED scripts/kconfig/zconf.tab.c
> SHIPPED scripts/kconfig/zconf.lex.c
> SHIPPED scripts/kconfig/zconf.hash.c
> HOSTCC scripts/kconfig/zconf.tab.o
> HOSTLD scripts/kconfig/conf
> scripts/kconfig/conf --oldconfig Kconfig
> #
> # configuration written to .config
> #
> mru@...corn:/tmp/linux-sata$ make ARCH=powerpc CROSS_COMPILE=powerpc64-none-linux-gnu- drivers/ata/sata_dwc_460ex.o
> scripts/kconfig/conf --silentoldconfig Kconfig
> CHK include/config/kernel.release
> UPD include/config/kernel.release
> WRAP arch/powerpc/include/generated/asm/clkdev.h
> WRAP arch/powerpc/include/generated/asm/div64.h
> WRAP arch/powerpc/include/generated/asm/irq_regs.h
> WRAP arch/powerpc/include/generated/asm/irq_work.h
> WRAP arch/powerpc/include/generated/asm/local64.h
> WRAP arch/powerpc/include/generated/asm/mcs_spinlock.h
> WRAP arch/powerpc/include/generated/asm/preempt.h
> WRAP arch/powerpc/include/generated/asm/rwsem.h
> WRAP arch/powerpc/include/generated/asm/vtime.h
> CHK include/generated/uapi/linux/version.h
> UPD include/generated/uapi/linux/version.h
> CHK include/generated/utsrelease.h
> UPD include/generated/utsrelease.h
> CC kernel/bounds.s
> CHK include/generated/bounds.h
> UPD include/generated/bounds.h
> CHK include/generated/timeconst.h
> UPD include/generated/timeconst.h
> CC arch/powerpc/kernel/asm-offsets.s
> CHK include/generated/asm-offsets.h
> UPD include/generated/asm-offsets.h
> CALL scripts/checksyscalls.sh
> HOSTCC scripts/dtc/dtc.o
> HOSTCC scripts/dtc/flattree.o
> HOSTCC scripts/dtc/fstree.o
> HOSTCC scripts/dtc/data.o
> HOSTCC scripts/dtc/livetree.o
> HOSTCC scripts/dtc/treesource.o
> HOSTCC scripts/dtc/srcpos.o
> HOSTCC scripts/dtc/checks.o
> HOSTCC scripts/dtc/util.o
> SHIPPED scripts/dtc/dtc-lexer.lex.c
> SHIPPED scripts/dtc/dtc-parser.tab.h
> HOSTCC scripts/dtc/dtc-lexer.lex.o
> SHIPPED scripts/dtc/dtc-parser.tab.c
> HOSTCC scripts/dtc/dtc-parser.tab.o
> HOSTLD scripts/dtc/dtc
> CC scripts/mod/empty.o
> HOSTCC scripts/mod/mk_elfconfig
> MKELF scripts/mod/elfconfig.h
> HOSTCC scripts/mod/modpost.o
> CC scripts/mod/devicetable-offsets.s
> GEN scripts/mod/devicetable-offsets.h
> HOSTCC scripts/mod/file2alias.o
> HOSTCC scripts/mod/sumversion.o
> HOSTLD scripts/mod/modpost
> HOSTCC scripts/kallsyms
> CC drivers/ata/sata_dwc_460ex.o
> drivers/ata/sata_dwc_460ex.c: In function 'dma_dwc_xfer_setup':
> drivers/ata/sata_dwc_460ex.c:383:20: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
> dma_addr_t addr = (dma_addr_t)&hsdev->sata_dwc_regs->dmadr;
> ^
> mru@...corn:/tmp/linux-sata$
>
> Patch file and .config attached.
>
> Looking into that warning, I doubt it works as is, but that's not caused
> by my patch. I can try to come up with a fix, but again, I can't test it.
>
Builds now. Using my own .config.
[ 4.784199] sata-dwc 4bffd1000.sata: id 0, controller version 1.82
[ 4.791186] scsi host0: sata-dwc
[ 4.794830] ata1: SATA max UDMA/133 irq 36
[ 4.799463] sata_sil 0001:00:04.0: Applying R_ERR on DMA activate FIS
errata fix
[ 4.807959] scsi host1: sata_sil
[ 4.811662] scsi host2: sata_sil
[ 4.815242] ata2: SATA max UDMA/100 mmio m512@...84280000 tf
0xd84280080 irq 21
[ 4.822990] ata3: SATA max UDMA/100 mmio m512@...84280000 tf
0xd842800c0 irq 21
[ 5.143502] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[ 5.164367] ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
[ 5.185174] ppc-of-ohci 4bffd0000.usb: irq 32, io mem 0x4bffd0000
[ 5.206125] Unable to handle kernel paging request for data at
address 0x00000000
[ 5.228546] Faulting instruction address: 0xc043a2c8
[ 5.248577] Vector: 300 (Data Access) at [eddafae0]
[ 5.268658] pc: c043a2c8: sata_dwc_qc_issue+0xb8/0x204
[ 5.289439] lr: c0427c34: ata_qc_issue+0x338/0x3a0
[ 5.309708] sp: eddafb90
[ 5.327573] msr: 21000
[ 5.345108] dar: 0
[ 5.362242] dsisr: 0
[ 5.379257] current = 0xedda85c0
[ 5.397452] pid = 81, comm = scsi_eh_0
[ 5.416599] enter ? for help
[ 5.434346] [eddafbe0] c0427c34 ata_qc_issue+0x338/0x3a0
[ 5.454892] [eddafc10] c0427f0c ata_exec_internal_sg+0x270/0x47c
[ 5.476090] [eddafc80] c042818c ata_exec_internal+0x74/0x7c
[ 5.496645] [eddafcc0] c042839c ata_dev_read_id+0x150/0x4e0
[ 5.517001] [eddafd40] c0434b4c ata_eh_recover+0xfac/0x1088
[ 5.537210] [eddafdd0] c043516c ata_do_eh+0x4c/0x9c
[ 5.556724] [eddafe00] c0434e10 ata_scsi_port_error_handler+0x148/0x3a4
[ 5.578026] [eddafe30] c04350f0 ata_scsi_error+0x84/0xb4
[ 5.597878] [eddafe60] c0410844 scsi_error_handler+0xa4/0x44c
[ 5.618242] [eddafed0] c0038938 kthread+0xc8/0xcc
[ 5.637383] [eddaff40] c000ad90 ret_from_kernel_thread+0x5c/0x64
[ 5.657798] mon> <no input ...>
[ 7.675523] Oops: Kernel access of bad area, sig: 11 [#1]
[ 7.695357] PREEMPT Canyonlands
[ 7.712998] Modules linked in:
[ 7.730338] CPU: 0 PID: 81 Comm: scsi_eh_0 Not tainted
4.4.0-rc5-Sam460ex #2
[ 7.751933] task: edda85c0 ti: eddae000 task.ti: eddae000
[ 7.771844] NIP: c043a2c8 LR: c0427c34 CTR: c043a210
[ 7.791229] REGS: eddafae0 TRAP: 0300 Not tainted (4.4.0-rc5-Sam460ex)
[ 7.812519] MSR: 00021000 <CE,ME> CR: 24000022 XER: 20000000
[ 7.833197] DEAR: 00000000 ESR: 00000000
GPR00: c0427c34 eddafb90 edda85c0 00000000 00000000 00000000 ee3c1724
00000000
GPR08: ffffffff 00000004 00000002 eddafc10 22000022 00000000 00000001
c09314dc
GPR16: fafbfcfd 00000000 00000001 00000000 00000000 00029000 00000200
eddafc18
GPR24: 000000ec 00000000 00000000 edcba7d0 edcae200 00000000 ee3c0000
ee3c1700
[ 7.939668] NIP [c043a2c8] sata_dwc_qc_issue+0xb8/0x204
[ 7.959417] LR [c0427c34] ata_qc_issue+0x338/0x3a0
[ 7.978735] Call Trace:
[ 7.995605] [eddafb90] [00000006] 0x6 (unreliable)
[ 8.015009] [eddafbe0] [c0427c34] ata_qc_issue+0x338/0x3a0
[ 8.035078] [eddafc10] [c0427f0c] ata_exec_internal_sg+0x270/0x47c
[ 8.055763] [eddafc80] [c042818c] ata_exec_internal+0x74/0x7c
[ 8.075824] [eddafcc0] [c042839c] ata_dev_read_id+0x150/0x4e0
[ 8.095822] [eddafd40] [c0434b4c] ata_eh_recover+0xfac/0x1088
[ 8.115762] [eddafdd0] [c043516c] ata_do_eh+0x4c/0x9c
[ 8.134973] [eddafe00] [c0434e10] ata_scsi_port_error_handler+0x148/0x3a4
[ 8.155945] [eddafe30] [c04350f0] ata_scsi_error+0x84/0xb4
[ 8.175503] [eddafe60] [c0410844] scsi_error_handler+0xa4/0x44c
[ 8.195428] [eddafed0] [c0038938] kthread+0xc8/0xcc
[ 8.214218] [eddaff40] [c000ad90] ret_from_kernel_thread+0x5c/0x64
[ 8.234351] Instruction dump:
[ 8.251202] 91010018 9121001c 39200000 99210030 39200040 807c0104
91210028 9121002c
[ 8.273517] 39200004 91410008 91210020 91210024 <81230000> 81290084
2f890000 419e0010
[ 8.296123] ---[ end trace 63c0d319677b6964 ]---
[ 8.315133]
[ 8.330746] note: scsi_eh_0[81] exited with preempt_count 1
[ 8.402946] ata2.00: ATA-8: WDC WD5000AAKS-00V1A0, 05.01D05, max UDMA/133
[ 8.444867] ata2.00: 976773168 sectors, multi 0: LBA48 NCQ (depth 0/32)
[ 8.474873] usb 1-1: new high-speed USB device number 2 using ppc-of-ehci
[ 8.521159] ata2.00: configured for UDMA/100
[ 11.324174] usb-storage 1-1.7:1.0: USB Mass Storage device detected
[ 11.351056] scsi host3: usb-storage 1-1.7:1.0
[ 12.377078] scsi 3:0:0:0: Direct-Access Generic Ultra HS-COMBO
1.98 PQ: 0 ANSI: 0
[ 12.406742] sd 3:0:0:0: Attached scsi generic sg0 type 0
[ 12.434765] sd 3:0:0:0: [sda] Attached SCSI removable disk
Boot ends here and wont go any further.
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