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Groups > linux.kernel > #1514069
| From | Mark Lord <mlord@pobox.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH net] r8152: Fix broken RX checksums. |
| Date | 2016-11-02 19:50 +0100 |
| Message-ID | <sz8LM-1va-3@gated-at.bofh.it> (permalink) |
| References | <sy7I5-2Mi-3@gated-at.bofh.it> <sy97c-3ze-11@gated-at.bofh.it> <syacV-4r8-1@gated-at.bofh.it> <sybVo-5pZ-5@gated-at.bofh.it> <syfYZ-8gd-5@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On 16-10-31 04:14 AM, Hayes Wang wrote:
>>>>> The r8152 driver has been broken since (approx) 3.16.xx
>>>>> when support was added for hardware RX checksums
>>>>> on newer chip versions. Symptoms include random
>>>>> segfaults and silent data corruption over NFS.
>>>>>
>>>>> The hardware checksum logig does not work on the VER_02
>>>>> dongles I have here when used with a slow embedded system CPU.
>>>>> Google reveals others reporting similar issues on Raspberry Pi.
...
> Our hw engineer says only VER_01 has the issue about rx checksum.
> I need more information for checking it.
I have poked at it some more, and thus far it appears that it is
only necessary to disable TCP rx checksums. The system doesn't crash
when only IP/UDP checksums are enabled, but does when TCP checksums are on.
This happens regardless of whether RX_AGG is disabled or enabled,
and increasing/decreasing the number of RX URBs (RTL8152_MAX_RX)
doesn't seem to affect it.
lsusb -vv (from an x86 system, not the failing embedded system) follows:
Bus 001 Device 004: ID 0bda:8152 Realtek Semiconductor Corp.
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.10
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x0bda Realtek Semiconductor Corp.
idProduct 0x8152
bcdDevice 20.00
iManufacturer 1 Realtek
iProduct 2 USB 10/100 LAN
iSerial 3 84E71400257D
bNumConfigurations 2
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 39
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xa0
(Bus Powered)
Remote Wakeup
MaxPower 100mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 3
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0002 1x 2 bytes
bInterval 8
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 80
bNumInterfaces 2
bConfigurationValue 2
iConfiguration 0
bmAttributes 0xa0
(Bus Powered)
Remote Wakeup
MaxPower 100mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 2 Communications
bInterfaceSubClass 6 Ethernet Networking
bInterfaceProtocol 0
iInterface 5 CDC Communications Control
CDC Header:
bcdCDC 1.10
CDC Union:
bMasterInterface 0
bSlaveInterface 1
CDC Ethernet:
iMacAddress 3 84E71400257D
bmEthernetStatistics 0x00000000
wMaxSegmentSize 1514
wNumberMCFilters 0x0000
bNumberPowerFilters 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0010 1x 16 bytes
bInterval 8
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 10 CDC Data
bInterfaceSubClass 0 Unused
bInterfaceProtocol 0
iInterface 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 1
bNumEndpoints 2
bInterfaceClass 10 CDC Data
bInterfaceSubClass 0 Unused
bInterfaceProtocol 0
iInterface 4 Ethernet Data
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Binary Object Store Descriptor:
bLength 5
bDescriptorType 15
wTotalLength 12
bNumDeviceCaps 1
USB 2.0 Extension Device Capability:
bLength 7
bDescriptorType 16
bDevCapabilityType 2
bmAttributes 0x00000002
Link Power Management (LPM) Supported
Device Status: 0x0000
(Bus Powered)
Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
[PATCH net] r8152: Fix broken RX checksums. Mark Lord <mlord@pobox.com> - 2016-10-31 00:30 +0100
Re: [PATCH net] r8152: Fix broken RX checksums. David Miller <davem@davemloft.net> - 2016-10-31 02:00 +0100
Re: [PATCH net] r8152: Fix broken RX checksums. Mark Lord <mlord@pobox.com> - 2016-10-31 03:10 +0100
Re: [PATCH net] r8152: Fix broken RX checksums. David Miller <davem@davemloft.net> - 2016-10-31 05:00 +0100
RE: [PATCH net] r8152: Fix broken RX checksums. Hayes Wang <hayeswang@realtek.com> - 2016-10-31 09:20 +0100
Re: [PATCH net] r8152: Fix broken RX checksums. Mark Lord <mlord@pobox.com> - 2016-10-31 14:30 +0100
Re: [PATCH net] r8152: Fix broken RX checksums. Mark Lord <mlord@pobox.com> - 2016-11-02 19:50 +0100
Re: [PATCH net] r8152: Fix broken RX checksums. Mark Lord <mlord@pobox.com> - 2016-11-04 13:20 +0100
RE: [PATCH net] r8152: Fix broken RX checksums. Hayes Wang <hayeswang@realtek.com> - 2016-11-03 10:00 +0100
Re: [PATCH net] r8152: Fix broken RX checksums. Mark Lord <mlord@pobox.com> - 2016-11-03 12:50 +0100
Re: [PATCH net] r8152: Fix broken RX checksums. Mark Lord <mlord@pobox.com> - 2016-11-04 15:00 +0100
Re: [PATCH net] r8152: Fix broken RX checksums. Mark Lord <mlord@pobox.com> - 2016-11-04 21:30 +0100
RE: [PATCH net] r8152: Fix broken RX checksums. Hayes Wang <hayeswang@realtek.com> - 2016-11-09 14:20 +0100
Re: [PATCH net] r8152: Fix broken RX checksums. Mark Lord <mlord@pobox.com> - 2016-11-09 14:20 +0100
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