Bug 90801

Summary:	Designware DMA problem T100TA
Product:	Drivers	Reporter:	Brian Loften (bloften80)
Component:	Other	Assignee:	drivers_other
Status:	RESOLVED CODE_FIX
Severity:	normal	CC:	dan.j.williams, jdelvare, viresh.kumar
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	3,19-next-01-05	Subsystem:
Regression:	No	Bisected commit-id:

Description Brian Loften 2015-01-05 12:48:14 UTC

Hello

With the new designware DMA controller options i am getting the following error message on startup

Have an ASUS t100ta baytrail system, which uses slave on the I2C BUS

 ------------[ cut here ]------------
[    0.398332] WARNING: CPU: 0 PID: 1 at drivers/dma/dmaengine.c:830 dma_async_device_register+0xd4/0x4f0()
[    0.398346] this driver doesn't support generic slave capabilities reporting
[    0.398355] Modules linked in:
[    0.398369] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.19.0-rc2-next-20150105 #1
[    0.398381] Hardware name: ASUSTeK COMPUTER INC. T100TA/T100TA, BIOS T100TA.313 08/13/2014
[    0.398394]  00000000 00000000 f4d21d2c c16e97d7 f4d21d70 f4d21d60 c1053f5c c19630e8
[    0.398418]  f4d21d8c 00000001 c193f781 0000033e c13eb054 0000033e c13eb054 f4fa7e0c
[    0.398440]  f4fc118c c13f8650 f4d21d78 c1053fc4 00000009 f4d21d70 c19630e8 f4d21d8c
[    0.398463] Call Trace:
[    0.398479]  [<c16e97d7>] dump_stack+0x41/0x52
[    0.398495]  [<c1053f5c>] warn_slowpath_common+0x8c/0xc0
[    0.398507]  [<c13eb054>] ? dma_async_device_register+0xd4/0x4f0
[    0.398520]  [<c13eb054>] ? dma_async_device_register+0xd4/0x4f0
[    0.398533]  [<c13f8650>] ? dwc_scan_descriptors+0x390/0x390
[    0.398544]  [<c1053fc4>] warn_slowpath_fmt+0x34/0x40
[    0.398557]  [<c13eb054>] dma_async_device_register+0xd4/0x4f0
[    0.398568]  [<c13f7580>] ? dwc_resume+0x40/0x40
[    0.398581]  [<c10a7e23>] ? request_threaded_irq+0xa3/0x130
[    0.398593]  [<c13f8c51>] dw_dma_probe+0x511/0x620
[    0.398606]  [<c13f9397>] dw_probe+0x107/0x1e0
[    0.398619]  [<c120c4d3>] ? sysfs_do_create_link_sd.isra.2+0x53/0xb0
[    0.398633]  [<c1450ffd>] platform_drv_probe+0x2d/0x90
[    0.398645]  [<c144eac2>] ? driver_sysfs_add+0x62/0x80
[    0.398656]  [<c144f0b4>] driver_probe_device+0x94/0x3a0
[    0.398670]  [<c13b6b14>] ? acpi_driver_match_device+0x93/0xa1
[    0.398682]  [<c120c268>] ? sysfs_create_dir_ns+0x38/0x80
[    0.398694]  [<c1451267>] ? platform_match+0x37/0x90
[    0.398705]  [<c144f471>] __driver_attach+0x71/0x80
[    0.398716]  [<c144f400>] ? __device_attach+0x40/0x40
[    0.398729]  [<c144d40f>] bus_for_each_dev+0x4f/0x80
[    0.398741]  [<c144eb9f>] driver_attach+0x1f/0x30
[    0.398751]  [<c144f400>] ? __device_attach+0x40/0x40
[    0.398764]  [<c144e817>] bus_add_driver+0x167/0x230
[    0.398776]  [<c1acd579>] ? ioat_init_module+0xa1/0xa1
[    0.398788]  [<c1acd579>] ? ioat_init_module+0xa1/0xa1
[    0.398799]  [<c144fb8e>] driver_register+0x5e/0xf0
[    0.398812]  [<c1340b31>] ? kvasprintf+0x41/0x50
[    0.398823]  [<c1450f63>] __platform_driver_register+0x43/0x50
[    0.398836]  [<c1acd588>] dw_init+0xf/0x11
[    0.398847]  [<c1000496>] do_one_initcall+0xc6/0x200
[    0.398859]  [<c1acd579>] ? ioat_init_module+0xa1/0xa1
[    0.398873]  [<c1a954f9>] ? repair_env_string+0x12/0x54
[    0.398886]  [<c1a95c94>] kernel_init_freeable+0x152/0x1d4
[    0.398899]  [<c16e2e31>] kernel_init+0x11/0xf0
[    0.398912]  [<c16ef981>] ret_from_kernel_thread+0x21/0x30
[    0.398923]  [<c16e2e20>] ? rest_init+0x70/0x70
[    0.398947] ---[ end trace eac12ef61082285e ]---
[    0.399330] dw_dmac INTL9C60:00: DesignWare DMA Controller, 8 channels
[    0.399610] ------------[ cut here ]------------
[    0.399626] WARNING: CPU: 0 PID: 1 at drivers/dma/dmaengine.c:830 dma_async_device_register+0xd4/0x4f0()
[    0.399638] this driver doesn't support generic slave capabilities reporting
[    0.399647] Modules linked in:
[    0.399659] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G        W       3.19.0-rc2-next-20150105 #1
[    0.399672] Hardware name: ASUSTeK COMPUTER INC. T100TA/T100TA, BIOS T100TA.313 08/13/2014
[    0.399684]  00000000 00000000 f4d21d2c c16e97d7 f4d21d70 f4d21d60 c1053f5c c19630e8
[    0.399707]  f4d21d8c 00000001 c193f781 0000033e c13eb054 0000033e c13eb054 f4fd600c
[    0.399729]  f4fc124c c13f8650 f4d21d78 c1053fc4 00000009 f4d21d70 c19630e8 f4d21d8c
[    0.399752] Call Trace:
[    0.399763]  [<c16e97d7>] dump_stack+0x41/0x52
[    0.399776]  [<c1053f5c>] warn_slowpath_common+0x8c/0xc0
[    0.399789]  [<c13eb054>] ? dma_async_device_register+0xd4/0x4f0
[    0.399801]  [<c13eb054>] ? dma_async_device_register+0xd4/0x4f0
[    0.399814]  [<c13f8650>] ? dwc_scan_descriptors+0x390/0x390
[    0.399825]  [<c1053fc4>] warn_slowpath_fmt+0x34/0x40
[    0.399837]  [<c13eb054>] dma_async_device_register+0xd4/0x4f0
[    0.399849]  [<c13f7580>] ? dwc_resume+0x40/0x40
[    0.399861]  [<c10a7e23>] ? request_threaded_irq+0xa3/0x130
[    0.399873]  [<c13f8c51>] dw_dma_probe+0x511/0x620
[    0.399885]  [<c13f9397>] dw_probe+0x107/0x1e0
[    0.399897]  [<c120c4d3>] ? sysfs_do_create_link_sd.isra.2+0x53/0xb0
[    0.399910]  [<c1450ffd>] platform_drv_probe+0x2d/0x90
[    0.399921]  [<c144eac2>] ? driver_sysfs_add+0x62/0x80
[    0.399933]  [<c144f0b4>] driver_probe_device+0x94/0x3a0
[    0.399945]  [<c13b6b14>] ? acpi_driver_match_device+0x93/0xa1
[    0.399957]  [<c120c268>] ? sysfs_create_dir_ns+0x38/0x80
[    0.399969]  [<c1451267>] ? platform_match+0x37/0x90
[    0.399981]  [<c144f471>] __driver_attach+0x71/0x80
[    0.399992]  [<c144f400>] ? __device_attach+0x40/0x40
[    0.400004]  [<c144d40f>] bus_for_each_dev+0x4f/0x80
[    0.400015]  [<c144eb9f>] driver_attach+0x1f/0x30
[    0.400026]  [<c144f400>] ? __device_attach+0x40/0x40
[    0.400038]  [<c144e817>] bus_add_driver+0x167/0x230
[    0.400051]  [<c1acd579>] ? ioat_init_module+0xa1/0xa1
[    0.400063]  [<c1acd579>] ? ioat_init_module+0xa1/0xa1
[    0.400074]  [<c144fb8e>] driver_register+0x5e/0xf0
[    0.400085]  [<c1340b31>] ? kvasprintf+0x41/0x50
[    0.400097]  [<c1450f63>] __platform_driver_register+0x43/0x50
[    0.400109]  [<c1acd588>] dw_init+0xf/0x11
[    0.400120]  [<c1000496>] do_one_initcall+0xc6/0x200
[    0.400149]  [<c1acd579>] ? ioat_init_module+0xa1/0xa1
[    0.400162]  [<c1a954f9>] ? repair_env_string+0x12/0x54
[    0.400176]  [<c1a95c94>] kernel_init_freeable+0x152/0x1d4
[    0.400189]  [<c16e2e31>] kernel_init+0x11/0xf0
[    0.400201]  [<c16ef981>] ret_from_kernel_thread+0x21/0x30
[    0.400213]  [<c16e2e20>] ? rest_init+0x70/0x70
[    0.400223] ---[ end trace eac12ef61082285f ]---
[    0.400614] dw_dmac INTL9C60:01: DesignWare DMA Controller, 8 channels

seems like it is related to the new i2c Slave functionality that was implemented

Comment 1 Jean Delvare 2015-02-19 07:44:30 UTC

I don't think this has anything to do with the I2C slave functionality. "slave" in the error message refers to a DMA channel capability. In fact, looking at the stack trace, I have no reason to believe that this bug is related to I2C at all, this is a DMA engine bug.

Comment 2 Viresh Kumar 2015-02-19 07:57:51 UTC

I have cc'd both of you to the patch that caused it.. Its all about dmaengine.

Comment 3 Jean Delvare 2015-02-23 09:44:19 UTC

Presumably fixed in 4.0-rc1 by:

commit 029a40e97d0db269f4a7fc02b0f29f627f628309
Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date:   Fri Jan 2 16:17:24 2015 +0200

    dmaengine: dw: provide DMA capabilities

Please reopen if not.