From mboxrd@z Thu Jan 1 00:00:00 1970 From: Julian Margetson Subject: Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Date: Fri, 18 Dec 2015 07:48:07 -0400 Message-ID: <5673F277.2050607@candw.ms> References: <1450221935-6034-1-git-send-email-mans@mansr.com> <1450364395.30729.136.camel@linux.intel.com> <1450367702.30729.146.camel@linux.intel.com> <1450371184.30729.175.camel@linux.intel.com> <5672F77F.4010306@candw.ms> <567302E8.5050303@candw.ms> <5673061A.4070700@candw.ms> <56732C04.9040100@candw.ms> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from smtp618.redcondor.net ([208.80.206.18]:35196 "EHLO smtp618.redcondor.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751853AbbLRLsd (ORCPT ); Fri, 18 Dec 2015 06:48:33 -0500 In-Reply-To: Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: =?UTF-8?B?TcOlbnMgUnVsbGfDpXJk?= Cc: Andy Shevchenko , Tejun Heo , linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org On 12/17/2015 8:06 PM, M=C3=A5ns Rullg=C3=A5rd wrote: > Julian Margetson writes: > >> On 12/17/2015 3:53 PM, M=C3=A5ns Rullg=C3=A5rd wrote: >>> Julian Margetson writes: >>> >>>> On 12/17/2015 2:51 PM, M=C3=A5ns Rullg=C3=A5rd wrote: >>>>> Julian Margetson writes: >>>>> >>>>>> On 12/17/2015 1:59 PM, M=C3=A5ns Rullg=C3=A5rd wrote: >>>>>>> Julian Margetson writes: >>>>>>> >>>>>>>> I have been running my machine mostly configured for pciex1 t= hus 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 unconditionall= y >>>>>>> dereferences a null pointer in the probe function. My patch fi= xes that >>>>>>> as a side-effect. >>>>>>> >>>>>> patching file drivers/ata/Kconfig >>>>>> >>>>>> Hunk #1 FAILED at 296. >>>>> [...] >>>>> >>>>>> root@julian-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 =C3=A2=E2=82=AC= =CB=9Csata_dwc_dma_dws=C3=A2=E2=82=AC=E2=84=A2 has initializer but inco= mplete type >>>> >>>> static struct dw_dma_slave sata_dwc_dma_dws =3D { >>>> ^ >>> It builds, albeit with an unrelated warning, using the attached con= fig. >>> Maybe there's a missing config dependency somewhere. >>> >> I am attempting to cross compile under Ubuntu 14.04 X86 in Virtualbo= x >> 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 =E2=80=98sata_d= wc_dma_dws=E2=80=99 has initializer but incomplete type >> static struct dw_dma_slave sata_dwc_dma_dws =3D { >> ^ > Bizarre. This is what it looks like here: > > mru@unicorn:/tmp/linux-sata$ git status > On branch sata-dwc > nothing to commit, working directory clean > mru@unicorn:/tmp/linux-sata$ git describe > v4.4-rc5 > mru@unicorn:/tmp/linux-sata$ sha1sum /tmp/0001-ata-sata_dwc_460ex-use= -dmas-DT-property-to-find-dma-.patch > e300971aa483390f82de2e9120dc16e460e74feb /tmp/0001-ata-sata_dwc_460e= x-use-dmas-DT-property-to-find-dma-.patch > mru@unicorn:/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 cha= nnel > mru@unicorn:/tmp/linux-sata$ sha1sum .config > 4e7615b8d2fa9a1c4b4ae9ffc363aefcaf3789ca .config > mru@unicorn:/tmp/linux-sata$ make ARCH=3Dpowerpc CROSS_COMPILE=3Dpowe= rpc64-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@unicorn:/tmp/linux-sata$ make ARCH=3Dpowerpc CROSS_COMPILE=3Dpowe= rpc64-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 in= teger of different size [-Wpointer-to-int-cast] > dma_addr_t addr =3D (dma_addr_t)&hsdev->sata_dwc_regs->dmadr; > ^ > mru@unicorn:/tmp/linux-sata$ > > Patch file and .config attached. > > Looking into that warning, I doubt it works as is, but that's not cau= sed > by my patch. I can try to come up with a fix, but again, I can't tes= t 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 FI= S=20 errata fix [ 4.807959] scsi host1: sata_sil [ 4.811662] scsi host2: sata_sil [ 4.815242] ata2: SATA max UDMA/100 mmio m512@0xd84280000 tf=20 0xd84280080 irq 21 [ 4.822990] ata3: SATA max UDMA/100 mmio m512@0xd84280000 tf=20 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=20 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 =3D 0xedda85c0 [ 5.397452] pid =3D 81, comm =3D 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+0x148/0x= 3a4 [ 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> [ 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=20 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-Sam46= 0ex) [ 7.812519] MSR: 00021000 CR: 24000022 XER: 20000000 [ 7.833197] DEAR: 00000000 ESR: 00000000 GPR00: c0427c34 eddafb90 edda85c0 00000000 00000000 00000000 ee3c1724=20 00000000 GPR08: ffffffff 00000004 00000002 eddafc10 22000022 00000000 00000001=20 c09314dc GPR16: fafbfcfd 00000000 00000001 00000000 00000000 00029000 00000200=20 eddafc18 GPR24: 000000ec 00000000 00000000 edcba7d0 edcae200 00000000 ee3c0000=20 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=20 91210028 9121002c [ 8.273517] 39200004 91410008 91210020 91210024 <81230000> 81290084=20 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 UDM= A/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 = =20 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.