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3.6.y: smsc95xx 1-1.1:1.0: eth0: Failed to read register index #149

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msperl opened this issue Oct 29, 2012 · 2 comments
Closed

3.6.y: smsc95xx 1-1.1:1.0: eth0: Failed to read register index #149

msperl opened this issue Oct 29, 2012 · 2 comments

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@msperl
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msperl commented Oct 29, 2012

With the 3.6.y kernel I am experiencing ethernet down situations (actually all of USB)

It mostly looks like this on the serial console:
[ 1321.113993] VCHIQka-0 D c03939b4 0 28 2 0x00000000
[ 1321.114085] from
[ 1321.114143] from
[ 6254.806482] usb 1-1.3.3: reset full-speed USB device number 6 using dwc_otg
[ 6260.486126] usb 1-1.3.3: reset full-speed USB device number 6 using dwc_otg
[ 6486.246527] usb 1-1.3.3: reset full-speed USB device number 6 using dwc_otg
[ 6561.320137] usb 1-1.3.3: reset full-speed USB device number 6 using dwc_otg
[ 6649.132339] usb 1-1.3.3: reset full-speed USB device number 6 using dwc_otg
[ 6796.459493] usb 1-1.3.3: reset full-speed USB device number 6 using dwc_otg
[ 7007.791102] usb 1-1.3.3: reset full-speed USB device number 6 using dwc_otg
[ 7015.690482] usb 1-1.3.3: reset full-speed USB device number 6 using dwc_otg
[ 7093.003697] usb 1-1.3.3: reset full-speed USB device number 6 using dwc_otg
[ 7099.413054] usb 1-1.3.3: reset full-speed USB device number 6 using dwc_otg
[13395.319822] smsc95xx 1-1.1:1.0: eth0: Failed to read register index 0x00000114
[13400.319410] smsc95xx 1-1.1:1.0: eth0: Failed to write register index 0x00000114
[13405.319020] smsc95xx 1-1.1:1.0: eth0: Failed to read register index 0x00000114
[13410.318588] smsc95xx 1-1.1:1.0: eth0: Failed to read register index 0x00000118
[13415.318188] smsc95xx 1-1.1:1.0: eth0: Failed to read register index 0x00000114
[13420.317764] smsc95xx 1-1.1:1.0: eth0: Failed to write register index 0x00000114
[13425.317349] smsc95xx 1-1.1:1.0: eth0: Failed to read register index 0x00000114
[13430.316953] smsc95xx 1-1.1:1.0: eth0: Failed to read register index 0x00000118
[13436.416457] smsc95xx 1-1.1:1.0: eth0: Failed to read register index 0x00000114
[13441.416035] smsc95xx 1-1.1:1.0: eth0: Failed to write register index 0x00000114
[13446.415635] smsc95xx 1-1.1:1.0: eth0: Failed to read register index 0x00000114
[13451.415217] smsc95xx 1-1.1:1.0: eth0: Failed to read register index 0x00000118
[13456.414767] smsc95xx 1-1.1:1.0: eth0: Failed to read register index 0x00000114
[13461.414379] smsc95xx 1-1.1:1.0: eth0: Failed to write register index 0x00000114
[13466.413963] smsc95xx 1-1.1:1.0: eth0: Failed to read register index 0x00000114
[13471.413550] smsc95xx 1-1.1:1.0: eth0: Failed to read register index 0x00000118
[13476.783099] smsc95xx 1-1.1:1.0: eth0: Failed to write register index 0x00000014
[13476.783134] smsc95xx 1-1.1:1.0: eth0: Failed to write HW_CFG_LRST_ bit in HW_CFG register, ret = -110
[13482.782596] smsc95xx 1-1.1:1.0: eth0: Failed to write register index 0x00000014
[13482.782632] smsc95xx 1-1.1:1.0: eth0: Failed to write HW_CFG_LRST_ bit in HW_CFG register, ret = -110
[13488.782114] smsc95xx 1-1.1:1.0: eth0: Failed to write register index 0x00000014
[13488.782150] smsc95xx 1-1.1:1.0: eth0: Failed to write HW_CFG_LRST_ bit in HW_CFG register, ret = -110
[13494.781606] smsc95xx 1-1.1:1.0: eth0: Failed to write register index 0x00000014
...

this happens at times when the whole system is idle and essentially doing nothing - I am just connected to the RPI remotely.

This - as far as I remember - did not happen with 3.2.27 kernels... (I would need to roll back to that kernel and try)

The RPI is connected to a bus powered HUB with a 5A Power Supply (twice - once for power and once for the connection to the USB devices, so only the HUB is directly connected everything else is hub-powered), so power should not be a problem...

Still surprisingly lsusb is working fine in the situation of the ethernet down!
root@raspberrypi:# lsusb
Bus 001 Device 002: ID 0424:9512 Standard Microsystems Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp.
Bus 001 Device 004: ID 0409:0050 NEC Corp. 7-port hub
Bus 001 Device 005: ID 0403:6001 Future Technology Devices International, Ltd FT232 USB-Serial (UART) IC
Bus 001 Device 006: ID 03eb:2104 Atmel Corp. AVR ISP mkII
root@raspberrypi:# lsusb -t
1-1.3.3:1.0: No such file or directory
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=dwc_otg/1p, 480M
|__ Port 1: Dev 2, If 0, Class=hub, Driver=hub/3p, 480M
|__ Port 1: Dev 3, If 0, Class=vend., Driver=smsc95xx, 480M
|__ Port 3: Dev 4, If 0, Class=hub, Driver=hub/7p, 480M
|__ Port 2: Dev 5, If 0, Class=vend., Driver=ftdi_sio, 12M
|__ Port 3: Dev 6, If 0, Class=vend., Driver=, 12M

but lsusb -vv gets stuck several times and then writes out: "incomplete hub descriptor, 7 bytes":
root@raspberrypi:~# lsusb -vv

Bus 001 Device 002: ID 0424:9512 Standard Microsystems Corp.
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 9 Hub
bDeviceSubClass 0 Unused
bDeviceProtocol 2 TT per port
bMaxPacketSize0 64
idVendor 0x0424 Standard Microsystems Corp.
idProduct 0x9512
bcdDevice 2.00
iManufacturer 0
iProduct 0
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 41
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xe0
Self Powered
Remote Wakeup
MaxPower 2mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 9 Hub
bInterfaceSubClass 0 Unused
bInterfaceProtocol 1 Single TT
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0001 1x 1 bytes
bInterval 12
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 1
bNumEndpoints 1
bInterfaceClass 9 Hub
bInterfaceSubClass 0 Unused
bInterfaceProtocol 2 TT per port
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0001 1x 1 bytes

bInterval 12

== HERE:

incomplete hub descriptor, 7 bytes
Device Status: 0x1a78
(Bus Powered)
Debug Mode

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 9 Hub
bDeviceSubClass 0 Unused
bDeviceProtocol 1 Single TT
bMaxPacketSize0 64
idVendor 0x1d6b Linux Foundation
idProduct 0x0002 2.0 root hub
bcdDevice 3.06
iManufacturer 3 Linux 3.6.1myrpigit+ dwc_otg_hcd
iProduct 2 DWC OTG Controller
iSerial 1 bcm2708_usb
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 25
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xe0
Self Powered
Remote Wakeup
MaxPower 0mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 9 Hub
bInterfaceSubClass 0 Unused
bInterfaceProtocol 0 Full speed (or root) hub
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0004 1x 4 bytes
bInterval 12
Hub Descriptor:
bLength 9
bDescriptorType 41
nNbrPorts 1
wHubCharacteristic 0x0008
Ganged power switching
Per-port overcurrent protection
TT think time 8 FS bits
bPwrOn2PwrGood 1 * 2 milli seconds
bHubContrCurrent 0 milli Ampere
DeviceRemovable 0x00
PortPwrCtrlMask 0xff
Hub Port Status:
Port 1: 0000.0503 highspeed power enable connect
Device Status: 0x0001
Self Powered

Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp.
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 255 Vendor Specific Class
bDeviceSubClass 0
bDeviceProtocol 1
bMaxPacketSize0 64
idVendor 0x0424 Standard Microsystems Corp.
idProduct 0xec00
bcdDevice 2.00
iManufacturer 0
iProduct 0
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 39
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xe0
Self Powered
Remote Wakeup
MaxPower 2mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 3
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 255
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 0x0010 1x 16 bytes
bInterval 4
Device Status: 0x1a78
(Bus Powered)
Debug Mode

Bus 001 Device 004: ID 0409:0050 NEC Corp. 7-port hub
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 9 Hub
bDeviceSubClass 0 Unused
bDeviceProtocol 1 Single TT
bMaxPacketSize0 64
idVendor 0x0409 NEC Corp.
idProduct 0x0050 7-port hub
bcdDevice 1.00
iManufacturer 0
iProduct 0
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 25
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xe0
Self Powered
Remote Wakeup
MaxPower 100mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 9 Hub
bInterfaceSubClass 0 Unused
bInterfaceProtocol 0 Full speed (or root) hub
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0001 1x 1 bytes

bInterval 12

== HERE:

incomplete hub descriptor, 7 bytes
Device Status: 0x1a78
(Bus Powered)
Debug Mode

Bus 001 Device 005: ID 0403:6001 Future Technology Devices International, Ltd FT232 USB-Serial (UART) IC
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 8
idVendor 0x0403 Future Technology Devices International, Ltd
idProduct 0x6001 FT232 USB-Serial (UART) IC
bcdDevice 6.00
iManufacturer 1
iProduct 2
iSerial 3
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 32
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xa0
(Bus Powered)
Remote Wakeup
MaxPower 90mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 2
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 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 0x0040 1x 64 bytes
bInterval 0
Device Status: 0x1a78
(Bus Powered)
Debug Mode

Bus 001 Device 006: ID 03eb:2104 Atmel Corp. AVR ISP mkII
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 255 Vendor Specific Class
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x03eb Atmel Corp.
idProduct 0x2104 AVR ISP mkII
bcdDevice 2.00
iManufacturer 1
iProduct 2
iSerial 3
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 32
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 100mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 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 0x0040 1x 64 bytes
bInterval 0
Device Status: 0x1a78
(Bus Powered)
Debug Mode
root@raspberrypi:~#

these error-messages only happen for HUB it seems!

Ciao, Martin
@msperl
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msperl commented Oct 31, 2012

Well, I did not see a reboot in 24 hours (without any changes on the setup or similar).
But I still see:
[126628.022186] usb 1-1.3.3: reset full-speed USB device number 6 using dwc_otg
[127178.086935] usb 1-1.3.3: reset full-speed USB device number 6 using dwc_otg
[127472.792714] usb 1-1.3.3: reset full-speed USB device number 6 using dwc_otg
[127612.961229] usb 1-1.3.3: reset full-speed USB device number 6 using dwc_otg

If it continues like this, then I will close this ticket in 24 hours...

@msperl
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msperl commented Oct 31, 2012

did not happen for another few hours and I had to reboot anyway for some updates...

@msperl msperl closed this as completed Oct 31, 2012
@x-magic x-magic mentioned this issue Jan 3, 2013
Closed
@GeorgeSapkin GeorgeSapkin mentioned this issue Jul 19, 2019
Open
sigmaris pushed a commit to sigmaris/linux that referenced this issue Oct 1, 2019
@kvaneesh @djbw
libnvdimm/region: Initialize bad block for volatile namespaces
c42adf8 
We do check for a bad block during namespace init and that use
region bad block list. We need to initialize the bad block
for volatile regions for this to work. We also observe a lockdep
warning as below because the lock is not initialized correctly
since we skip bad block init for volatile regions.

 INFO: trying to register non-static key.
 the code is fine but needs lockdep annotation.
 turning off the locking correctness validator.
 CPU: 2 PID: 1 Comm: swapper/0 Not tainted 5.3.0-rc1-15699-g3dee241c937e raspberrypi#149
 Call Trace:
 [c0000000f95cb250] [c00000000147dd84] dump_stack+0xe8/0x164 (unreliable)
 [c0000000f95cb2a0] [c00000000022ccd8] register_lock_class+0x308/0xa60
 [c0000000f95cb3a0] [c000000000229cc0] __lock_acquire+0x170/0x1ff0
 [c0000000f95cb4c0] [c00000000022c740] lock_acquire+0x220/0x270
 [c0000000f95cb580] [c000000000a93230] badblocks_check+0xc0/0x290
 [c0000000f95cb5f0] [c000000000d97540] nd_pfn_validate+0x5c0/0x7f0
 [c0000000f95cb6d0] [c000000000d98300] nd_dax_probe+0xd0/0x1f0
 [c0000000f95cb760] [c000000000d9b66c] nd_pmem_probe+0x10c/0x160
 [c0000000f95cb790] [c000000000d7f5ec] nvdimm_bus_probe+0x10c/0x240
 [c0000000f95cb820] [c000000000d0f844] really_probe+0x254/0x4e0
 [c0000000f95cb8b0] [c000000000d0fdfc] driver_probe_device+0x16c/0x1e0
 [c0000000f95cb930] [c000000000d10238] device_driver_attach+0x68/0xa0
 [c0000000f95cb970] [c000000000d1040c] __driver_attach+0x19c/0x1c0
 [c0000000f95cb9f0] [c000000000d0c4c4] bus_for_each_dev+0x94/0x130
 [c0000000f95cba50] [c000000000d0f014] driver_attach+0x34/0x50
 [c0000000f95cba70] [c000000000d0e208] bus_add_driver+0x178/0x2f0
 [c0000000f95cbb00] [c000000000d117c8] driver_register+0x108/0x170
 [c0000000f95cbb70] [c000000000d7edb0] __nd_driver_register+0xe0/0x100
 [c0000000f95cbbd0] [c000000001a6baa4] nd_pmem_driver_init+0x34/0x48
 [c0000000f95cbbf0] [c0000000000106f4] do_one_initcall+0x1d4/0x4b0
 [c0000000f95cbcd0] [c0000000019f499c] kernel_init_freeable+0x544/0x65c
 [c0000000f95cbdb0] [c000000000010d6c] kernel_init+0x2c/0x180
 [c0000000f95cbe20] [c00000000000b954] ret_from_kernel_thread+0x5c/0x68

Signed-off-by: Aneesh Kumar K.V <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Dan Williams <[email protected]>
popcornmix pushed a commit that referenced this issue Oct 11, 2019
@kvaneesh @gregkh
libnvdimm/region: Initialize bad block for volatile namespaces
2e93d24 
[ Upstream commit c42adf8 ]

We do check for a bad block during namespace init and that use
region bad block list. We need to initialize the bad block
for volatile regions for this to work. We also observe a lockdep
warning as below because the lock is not initialized correctly
since we skip bad block init for volatile regions.

 INFO: trying to register non-static key.
 the code is fine but needs lockdep annotation.
 turning off the locking correctness validator.
 CPU: 2 PID: 1 Comm: swapper/0 Not tainted 5.3.0-rc1-15699-g3dee241c937e #149
 Call Trace:
 [c0000000f95cb250] [c00000000147dd84] dump_stack+0xe8/0x164 (unreliable)
 [c0000000f95cb2a0] [c00000000022ccd8] register_lock_class+0x308/0xa60
 [c0000000f95cb3a0] [c000000000229cc0] __lock_acquire+0x170/0x1ff0
 [c0000000f95cb4c0] [c00000000022c740] lock_acquire+0x220/0x270
 [c0000000f95cb580] [c000000000a93230] badblocks_check+0xc0/0x290
 [c0000000f95cb5f0] [c000000000d97540] nd_pfn_validate+0x5c0/0x7f0
 [c0000000f95cb6d0] [c000000000d98300] nd_dax_probe+0xd0/0x1f0
 [c0000000f95cb760] [c000000000d9b66c] nd_pmem_probe+0x10c/0x160
 [c0000000f95cb790] [c000000000d7f5ec] nvdimm_bus_probe+0x10c/0x240
 [c0000000f95cb820] [c000000000d0f844] really_probe+0x254/0x4e0
 [c0000000f95cb8b0] [c000000000d0fdfc] driver_probe_device+0x16c/0x1e0
 [c0000000f95cb930] [c000000000d10238] device_driver_attach+0x68/0xa0
 [c0000000f95cb970] [c000000000d1040c] __driver_attach+0x19c/0x1c0
 [c0000000f95cb9f0] [c000000000d0c4c4] bus_for_each_dev+0x94/0x130
 [c0000000f95cba50] [c000000000d0f014] driver_attach+0x34/0x50
 [c0000000f95cba70] [c000000000d0e208] bus_add_driver+0x178/0x2f0
 [c0000000f95cbb00] [c000000000d117c8] driver_register+0x108/0x170
 [c0000000f95cbb70] [c000000000d7edb0] __nd_driver_register+0xe0/0x100
 [c0000000f95cbbd0] [c000000001a6baa4] nd_pmem_driver_init+0x34/0x48
 [c0000000f95cbbf0] [c0000000000106f4] do_one_initcall+0x1d4/0x4b0
 [c0000000f95cbcd0] [c0000000019f499c] kernel_init_freeable+0x544/0x65c
 [c0000000f95cbdb0] [c000000000010d6c] kernel_init+0x2c/0x180
 [c0000000f95cbe20] [c00000000000b954] ret_from_kernel_thread+0x5c/0x68

Signed-off-by: Aneesh Kumar K.V <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Dan Williams <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
popcornmix pushed a commit that referenced this issue Oct 21, 2019
@kvaneesh @gregkh
libnvdimm/region: Initialize bad block for volatile namespaces
7af32ef 
[ Upstream commit c42adf8 ]

We do check for a bad block during namespace init and that use
region bad block list. We need to initialize the bad block
for volatile regions for this to work. We also observe a lockdep
warning as below because the lock is not initialized correctly
since we skip bad block init for volatile regions.

 INFO: trying to register non-static key.
 the code is fine but needs lockdep annotation.
 turning off the locking correctness validator.
 CPU: 2 PID: 1 Comm: swapper/0 Not tainted 5.3.0-rc1-15699-g3dee241c937e #149
 Call Trace:
 [c0000000f95cb250] [c00000000147dd84] dump_stack+0xe8/0x164 (unreliable)
 [c0000000f95cb2a0] [c00000000022ccd8] register_lock_class+0x308/0xa60
 [c0000000f95cb3a0] [c000000000229cc0] __lock_acquire+0x170/0x1ff0
 [c0000000f95cb4c0] [c00000000022c740] lock_acquire+0x220/0x270
 [c0000000f95cb580] [c000000000a93230] badblocks_check+0xc0/0x290
 [c0000000f95cb5f0] [c000000000d97540] nd_pfn_validate+0x5c0/0x7f0
 [c0000000f95cb6d0] [c000000000d98300] nd_dax_probe+0xd0/0x1f0
 [c0000000f95cb760] [c000000000d9b66c] nd_pmem_probe+0x10c/0x160
 [c0000000f95cb790] [c000000000d7f5ec] nvdimm_bus_probe+0x10c/0x240
 [c0000000f95cb820] [c000000000d0f844] really_probe+0x254/0x4e0
 [c0000000f95cb8b0] [c000000000d0fdfc] driver_probe_device+0x16c/0x1e0
 [c0000000f95cb930] [c000000000d10238] device_driver_attach+0x68/0xa0
 [c0000000f95cb970] [c000000000d1040c] __driver_attach+0x19c/0x1c0
 [c0000000f95cb9f0] [c000000000d0c4c4] bus_for_each_dev+0x94/0x130
 [c0000000f95cba50] [c000000000d0f014] driver_attach+0x34/0x50
 [c0000000f95cba70] [c000000000d0e208] bus_add_driver+0x178/0x2f0
 [c0000000f95cbb00] [c000000000d117c8] driver_register+0x108/0x170
 [c0000000f95cbb70] [c000000000d7edb0] __nd_driver_register+0xe0/0x100
 [c0000000f95cbbd0] [c000000001a6baa4] nd_pmem_driver_init+0x34/0x48
 [c0000000f95cbbf0] [c0000000000106f4] do_one_initcall+0x1d4/0x4b0
 [c0000000f95cbcd0] [c0000000019f499c] kernel_init_freeable+0x544/0x65c
 [c0000000f95cbdb0] [c000000000010d6c] kernel_init+0x2c/0x180
 [c0000000f95cbe20] [c00000000000b954] ret_from_kernel_thread+0x5c/0x68

Signed-off-by: Aneesh Kumar K.V <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Dan Williams <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
popcornmix pushed a commit that referenced this issue Aug 23, 2022
@gregkh
RISC-V: kexec: Fixup use of smp_processor_id() in preemptible context
ce0dbe9 
commit 357628e upstream.

Use __smp_processor_id() to avoid check the preemption context when
CONFIG_DEBUG_PREEMPT enabled, as we will enter crash kernel and no
return.

Without the patch,
[  103.781044] sysrq: Trigger a crash
[  103.784625] Kernel panic - not syncing: sysrq triggered crash
[  103.837634] CPU1: off
[  103.889668] CPU2: off
[  103.933479] CPU3: off
[  103.939424] Starting crashdump kernel...
[  103.943442] BUG: using smp_processor_id() in preemptible [00000000] code: sh/346
[  103.950884] caller is debug_smp_processor_id+0x1c/0x26
[  103.956051] CPU: 0 PID: 346 Comm: sh Kdump: loaded Not tainted 5.10.113-00002-gce03f03bf4ec-dirty #149
[  103.965355] Call Trace:
[  103.967805] [<ffffffe00020372a>] walk_stackframe+0x0/0xa2
[  103.973206] [<ffffffe000bcf1f4>] show_stack+0x32/0x3e
[  103.978258] [<ffffffe000bd382a>] dump_stack_lvl+0x72/0x8e
[  103.983655] [<ffffffe000bd385a>] dump_stack+0x14/0x1c
[  103.988705] [<ffffffe000bdc8fe>] check_preemption_disabled+0x9e/0xaa
[  103.995057] [<ffffffe000bdc926>] debug_smp_processor_id+0x1c/0x26
[  104.001150] [<ffffffe000206c64>] machine_kexec+0x22/0xd0
[  104.006463] [<ffffffe000291a7e>] __crash_kexec+0x6a/0xa4
[  104.011774] [<ffffffe000bcf3fa>] panic+0xfc/0x2b0
[  104.016480] [<ffffffe000656ca4>] sysrq_reset_seq_param_set+0x0/0x70
[  104.022745] [<ffffffe000657310>] __handle_sysrq+0x8c/0x154
[  104.028229] [<ffffffe0006577e8>] write_sysrq_trigger+0x5a/0x6a
[  104.034061] [<ffffffe0003d90e0>] proc_reg_write+0x58/0xd4
[  104.039459] [<ffffffe00036cff4>] vfs_write+0x7e/0x254
[  104.044509] [<ffffffe00036d2f6>] ksys_write+0x58/0xbe
[  104.049558] [<ffffffe00036d36a>] sys_write+0xe/0x16
[  104.054434] [<ffffffe000201b9a>] ret_from_syscall+0x0/0x2
[  104.067863] Will call new kernel at ecc00000 from hart id 0
[  104.074939] FDT image at fc5ee000
[  104.079523] Bye...

With the patch we can got clear output,
[   67.740553] sysrq: Trigger a crash
[   67.744166] Kernel panic - not syncing: sysrq triggered crash
[   67.809123] CPU1: off
[   67.865210] CPU2: off
[   67.909075] CPU3: off
[   67.919123] Starting crashdump kernel...
[   67.924900] Will call new kernel at ecc00000 from hart id 0
[   67.932045] FDT image at fc5ee000
[   67.935560] Bye...

Fixes: 0e105f1 ("riscv: use hart id instead of cpu id on machine_kexec")
Reviewed-by: Guo Ren <[email protected]>
Reviewed-by: Heiko Stuebner <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
Signed-off-by: Xianting Tian <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Cc: [email protected]
Signed-off-by: Palmer Dabbelt <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
popcornmix pushed a commit that referenced this issue Aug 23, 2022
@gregkh
RISC-V: kexec: Fixup use of smp_processor_id() in preemptible context
22ae2fe 
commit 357628e upstream.

Use __smp_processor_id() to avoid check the preemption context when
CONFIG_DEBUG_PREEMPT enabled, as we will enter crash kernel and no
return.

Without the patch,
[  103.781044] sysrq: Trigger a crash
[  103.784625] Kernel panic - not syncing: sysrq triggered crash
[  103.837634] CPU1: off
[  103.889668] CPU2: off
[  103.933479] CPU3: off
[  103.939424] Starting crashdump kernel...
[  103.943442] BUG: using smp_processor_id() in preemptible [00000000] code: sh/346
[  103.950884] caller is debug_smp_processor_id+0x1c/0x26
[  103.956051] CPU: 0 PID: 346 Comm: sh Kdump: loaded Not tainted 5.10.113-00002-gce03f03bf4ec-dirty #149
[  103.965355] Call Trace:
[  103.967805] [<ffffffe00020372a>] walk_stackframe+0x0/0xa2
[  103.973206] [<ffffffe000bcf1f4>] show_stack+0x32/0x3e
[  103.978258] [<ffffffe000bd382a>] dump_stack_lvl+0x72/0x8e
[  103.983655] [<ffffffe000bd385a>] dump_stack+0x14/0x1c
[  103.988705] [<ffffffe000bdc8fe>] check_preemption_disabled+0x9e/0xaa
[  103.995057] [<ffffffe000bdc926>] debug_smp_processor_id+0x1c/0x26
[  104.001150] [<ffffffe000206c64>] machine_kexec+0x22/0xd0
[  104.006463] [<ffffffe000291a7e>] __crash_kexec+0x6a/0xa4
[  104.011774] [<ffffffe000bcf3fa>] panic+0xfc/0x2b0
[  104.016480] [<ffffffe000656ca4>] sysrq_reset_seq_param_set+0x0/0x70
[  104.022745] [<ffffffe000657310>] __handle_sysrq+0x8c/0x154
[  104.028229] [<ffffffe0006577e8>] write_sysrq_trigger+0x5a/0x6a
[  104.034061] [<ffffffe0003d90e0>] proc_reg_write+0x58/0xd4
[  104.039459] [<ffffffe00036cff4>] vfs_write+0x7e/0x254
[  104.044509] [<ffffffe00036d2f6>] ksys_write+0x58/0xbe
[  104.049558] [<ffffffe00036d36a>] sys_write+0xe/0x16
[  104.054434] [<ffffffe000201b9a>] ret_from_syscall+0x0/0x2
[  104.067863] Will call new kernel at ecc00000 from hart id 0
[  104.074939] FDT image at fc5ee000
[  104.079523] Bye...

With the patch we can got clear output,
[   67.740553] sysrq: Trigger a crash
[   67.744166] Kernel panic - not syncing: sysrq triggered crash
[   67.809123] CPU1: off
[   67.865210] CPU2: off
[   67.909075] CPU3: off
[   67.919123] Starting crashdump kernel...
[   67.924900] Will call new kernel at ecc00000 from hart id 0
[   67.932045] FDT image at fc5ee000
[   67.935560] Bye...

Fixes: 0e105f1 ("riscv: use hart id instead of cpu id on machine_kexec")
Reviewed-by: Guo Ren <[email protected]>
Reviewed-by: Heiko Stuebner <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
Signed-off-by: Xianting Tian <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Cc: [email protected]
Signed-off-by: Palmer Dabbelt <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
popcornmix pushed a commit that referenced this issue Aug 23, 2022
@gregkh
RISC-V: kexec: Fixup use of smp_processor_id() in preemptible context
09dff39 
commit 357628e upstream.

Use __smp_processor_id() to avoid check the preemption context when
CONFIG_DEBUG_PREEMPT enabled, as we will enter crash kernel and no
return.

Without the patch,
[  103.781044] sysrq: Trigger a crash
[  103.784625] Kernel panic - not syncing: sysrq triggered crash
[  103.837634] CPU1: off
[  103.889668] CPU2: off
[  103.933479] CPU3: off
[  103.939424] Starting crashdump kernel...
[  103.943442] BUG: using smp_processor_id() in preemptible [00000000] code: sh/346
[  103.950884] caller is debug_smp_processor_id+0x1c/0x26
[  103.956051] CPU: 0 PID: 346 Comm: sh Kdump: loaded Not tainted 5.10.113-00002-gce03f03bf4ec-dirty #149
[  103.965355] Call Trace:
[  103.967805] [<ffffffe00020372a>] walk_stackframe+0x0/0xa2
[  103.973206] [<ffffffe000bcf1f4>] show_stack+0x32/0x3e
[  103.978258] [<ffffffe000bd382a>] dump_stack_lvl+0x72/0x8e
[  103.983655] [<ffffffe000bd385a>] dump_stack+0x14/0x1c
[  103.988705] [<ffffffe000bdc8fe>] check_preemption_disabled+0x9e/0xaa
[  103.995057] [<ffffffe000bdc926>] debug_smp_processor_id+0x1c/0x26
[  104.001150] [<ffffffe000206c64>] machine_kexec+0x22/0xd0
[  104.006463] [<ffffffe000291a7e>] __crash_kexec+0x6a/0xa4
[  104.011774] [<ffffffe000bcf3fa>] panic+0xfc/0x2b0
[  104.016480] [<ffffffe000656ca4>] sysrq_reset_seq_param_set+0x0/0x70
[  104.022745] [<ffffffe000657310>] __handle_sysrq+0x8c/0x154
[  104.028229] [<ffffffe0006577e8>] write_sysrq_trigger+0x5a/0x6a
[  104.034061] [<ffffffe0003d90e0>] proc_reg_write+0x58/0xd4
[  104.039459] [<ffffffe00036cff4>] vfs_write+0x7e/0x254
[  104.044509] [<ffffffe00036d2f6>] ksys_write+0x58/0xbe
[  104.049558] [<ffffffe00036d36a>] sys_write+0xe/0x16
[  104.054434] [<ffffffe000201b9a>] ret_from_syscall+0x0/0x2
[  104.067863] Will call new kernel at ecc00000 from hart id 0
[  104.074939] FDT image at fc5ee000
[  104.079523] Bye...

With the patch we can got clear output,
[   67.740553] sysrq: Trigger a crash
[   67.744166] Kernel panic - not syncing: sysrq triggered crash
[   67.809123] CPU1: off
[   67.865210] CPU2: off
[   67.909075] CPU3: off
[   67.919123] Starting crashdump kernel...
[   67.924900] Will call new kernel at ecc00000 from hart id 0
[   67.932045] FDT image at fc5ee000
[   67.935560] Bye...

Fixes: 0e105f1 ("riscv: use hart id instead of cpu id on machine_kexec")
Reviewed-by: Guo Ren <[email protected]>
Reviewed-by: Heiko Stuebner <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
Signed-off-by: Xianting Tian <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Cc: [email protected]
Signed-off-by: Palmer Dabbelt <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
popcornmix pushed a commit that referenced this issue Mar 21, 2023
@LorenzoBianconi @kuba-moo
veth: rely on rtnl_dereference() instead of on rcu_dereference() in v…
5ce76fe 
…eth_set_xdp_features()

Fix the following kernel warning in veth_set_xdp_features routine
relying on rtnl_dereference() instead of on rcu_dereference():

=============================
WARNING: suspicious RCU usage
6.3.0-rc1-00144-g064d70527aaa #149 Not tainted
-----------------------------
drivers/net/veth.c:1265 suspicious rcu_dereference_check() usage!

other info that might help us debug this:

rcu_scheduler_active = 2, debug_locks = 1
1 lock held by ip/135:
(net/core/rtnetlink.c:6172)

stack backtrace:
CPU: 1 PID: 135 Comm: ip Not tainted 6.3.0-rc1-00144-g064d70527aaa #149
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1
04/01/2014
Call Trace:
 <TASK>
dump_stack_lvl (lib/dump_stack.c:107)
lockdep_rcu_suspicious (include/linux/context_tracking.h:152)
veth_set_xdp_features (drivers/net/veth.c:1265 (discriminator 9))
veth_newlink (drivers/net/veth.c:1892)
? veth_set_features (drivers/net/veth.c:1774)
? kasan_save_stack (mm/kasan/common.c:47)
? kasan_save_stack (mm/kasan/common.c:46)
? kasan_set_track (mm/kasan/common.c:52)
? alloc_netdev_mqs (include/linux/slab.h:737)
? rcu_read_lock_sched_held (kernel/rcu/update.c:125)
? trace_kmalloc (include/trace/events/kmem.h:54)
? __xdp_rxq_info_reg (net/core/xdp.c:188)
? alloc_netdev_mqs (net/core/dev.c:10657)
? rtnl_create_link (net/core/rtnetlink.c:3312)
rtnl_newlink_create (net/core/rtnetlink.c:3440)
? rtnl_link_get_net_capable.constprop.0 (net/core/rtnetlink.c:3391)
__rtnl_newlink (net/core/rtnetlink.c:3657)
? lock_downgrade (kernel/locking/lockdep.c:5321)
? rtnl_link_unregister (net/core/rtnetlink.c:3487)
rtnl_newlink (net/core/rtnetlink.c:3671)
rtnetlink_rcv_msg (net/core/rtnetlink.c:6174)
? rtnl_link_fill (net/core/rtnetlink.c:6070)
? mark_usage (kernel/locking/lockdep.c:4914)
? mark_usage (kernel/locking/lockdep.c:4914)
netlink_rcv_skb (net/netlink/af_netlink.c:2574)
? rtnl_link_fill (net/core/rtnetlink.c:6070)
? netlink_ack (net/netlink/af_netlink.c:2551)
? lock_acquire (kernel/locking/lockdep.c:467)
? net_generic (include/linux/rcupdate.h:805)
? netlink_deliver_tap (include/linux/rcupdate.h:805)
netlink_unicast (net/netlink/af_netlink.c:1340)
? netlink_attachskb (net/netlink/af_netlink.c:1350)
netlink_sendmsg (net/netlink/af_netlink.c:1942)
? netlink_unicast (net/netlink/af_netlink.c:1861)
? netlink_unicast (net/netlink/af_netlink.c:1861)
sock_sendmsg (net/socket.c:727)
____sys_sendmsg (net/socket.c:2501)
? kernel_sendmsg (net/socket.c:2448)
? __copy_msghdr (net/socket.c:2428)
___sys_sendmsg (net/socket.c:2557)
? mark_usage (kernel/locking/lockdep.c:4914)
? do_recvmmsg (net/socket.c:2544)
? lock_acquire (kernel/locking/lockdep.c:467)
? find_held_lock (kernel/locking/lockdep.c:5159)
? __lock_release (kernel/locking/lockdep.c:5345)
? __might_fault (mm/memory.c:5625)
? lock_downgrade (kernel/locking/lockdep.c:5321)
? __fget_light (include/linux/atomic/atomic-arch-fallback.h:227)
__sys_sendmsg (include/linux/file.h:31)
? __sys_sendmsg_sock (net/socket.c:2572)
? rseq_get_rseq_cs (kernel/rseq.c:275)
? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4263)
do_syscall_64 (arch/x86/entry/common.c:50)
entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:120)
RIP: 0033:0x7f0d1aadeb17
Code: 0f 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e
fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00
f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10

Fixes: fccca03 ("veth: take into account device reconfiguration for xdp_features flag")
Suggested-by: Eric Dumazet <[email protected]>
Reported-by: Matthieu Baerts <[email protected]>
Link: https://lore.kernel.org/netdev/[email protected]/T/#me4c9d8e985ec7ebee981cfdb5bc5ec651ef4035d
Signed-off-by: Lorenzo Bianconi <[email protected]>
Reported-by: [email protected]
Reviewed-by: Eric Dumazet <[email protected]>
Tested-by: Matthieu Baerts <[email protected]>
Link: https://lore.kernel.org/r/dfd6a9a7d85e9113063165e1f47b466b90ad7b8a.1678748579.git.lorenzo@kernel.org
Signed-off-by: Jakub Kicinski <[email protected]>
popcornmix pushed a commit that referenced this issue Sep 13, 2023
@hildawur @gregkh
Bluetooth: msft: Extended monitor tracking by address filter
80fe278 
[ Upstream commit 9e14606 ]

Since limited tracking device per condition, this feature is to support
tracking multiple devices concurrently.
When a pattern monitor detects the device, this feature issues an address
monitor for tracking that device. Let pattern monitor can keep monitor
new devices.
This feature adds an address filter when receiving a LE monitor device
event which monitor handle is for a pattern, and the controller started
monitoring the device. And this feature also has cancelled the monitor
advertisement from address filters when receiving a LE monitor device
event when the controller stopped monitoring the device specified by an
address and monitor handle.

Below is an example to know the feature adds the address filter.

//Add MSFT pattern monitor
< HCI Command: Vendor (0x3f|0x00f0) plen 14          #142 [hci0] 55.552420
        03 b8 a4 03 ff 01 01 06 09 05 5f 52 45 46        .........._REF
> HCI Event: Command Complete (0x0e) plen 6          #143 [hci0] 55.653960
      Vendor (0x3f|0x00f0) ncmd 2
        Status: Success (0x00)
        03 00

//Got event from the pattern monitor
> HCI Event: Vendor (0xff) plen 18                   #148 [hci0] 58.384953
        23 79 54 33 77 88 97 68 02 00 fb c1 29 eb 27 b8  #yT3w..h....).'.
        00 01                                            ..

//Add MSFT address monitor (Sample address: B8:27:EB:29:C1:FB)
< HCI Command: Vendor (0x3f|0x00f0) plen 13          #149 [hci0] 58.385067
        03 b8 a4 03 ff 04 00 fb c1 29 eb 27 b8           .........).'.

//Report to userspace about found device (ADV Monitor Device Found)
@ MGMT Event: Unknown (0x002f) plen 38           {0x0003} [hci0] 58.680042
        01 00 fb c1 29 eb 27 b8 01 ce 00 00 00 00 16 00  ....).'.........
        0a 09 4b 45 59 42 44 5f 52 45 46 02 01 06 03 19  ..KEYBD_REF.....
        c1 03 03 03 12 18                                ......

//Got event from address monitor
> HCI Event: Vendor (0xff) plen 18                   #152 [hci0] 58.672956
        23 79 54 33 77 88 97 68 02 00 fb c1 29 eb 27 b8  #yT3w..h....).'.
        01 01

Signed-off-by: Alex Lu <[email protected]>
Signed-off-by: Hilda Wu <[email protected]>
Reviewed-by: Simon Horman <[email protected]>
Signed-off-by: Luiz Augusto von Dentz <[email protected]>
Stable-dep-of: 253f339 ("Bluetooth: HCI: Introduce HCI_QUIRK_BROKEN_LE_CODED")
Signed-off-by: Sasha Levin <[email protected]>
popcornmix pushed a commit that referenced this issue Sep 13, 2023
@hildawur @gregkh
Bluetooth: msft: Extended monitor tracking by address filter
f9965f7 
[ Upstream commit 9e14606 ]

Since limited tracking device per condition, this feature is to support
tracking multiple devices concurrently.
When a pattern monitor detects the device, this feature issues an address
monitor for tracking that device. Let pattern monitor can keep monitor
new devices.
This feature adds an address filter when receiving a LE monitor device
event which monitor handle is for a pattern, and the controller started
monitoring the device. And this feature also has cancelled the monitor
advertisement from address filters when receiving a LE monitor device
event when the controller stopped monitoring the device specified by an
address and monitor handle.

Below is an example to know the feature adds the address filter.

//Add MSFT pattern monitor
< HCI Command: Vendor (0x3f|0x00f0) plen 14          #142 [hci0] 55.552420
        03 b8 a4 03 ff 01 01 06 09 05 5f 52 45 46        .........._REF
> HCI Event: Command Complete (0x0e) plen 6          #143 [hci0] 55.653960
      Vendor (0x3f|0x00f0) ncmd 2
        Status: Success (0x00)
        03 00

//Got event from the pattern monitor
> HCI Event: Vendor (0xff) plen 18                   #148 [hci0] 58.384953
        23 79 54 33 77 88 97 68 02 00 fb c1 29 eb 27 b8  #yT3w..h....).'.
        00 01                                            ..

//Add MSFT address monitor (Sample address: B8:27:EB:29:C1:FB)
< HCI Command: Vendor (0x3f|0x00f0) plen 13          #149 [hci0] 58.385067
        03 b8 a4 03 ff 04 00 fb c1 29 eb 27 b8           .........).'.

//Report to userspace about found device (ADV Monitor Device Found)
@ MGMT Event: Unknown (0x002f) plen 38           {0x0003} [hci0] 58.680042
        01 00 fb c1 29 eb 27 b8 01 ce 00 00 00 00 16 00  ....).'.........
        0a 09 4b 45 59 42 44 5f 52 45 46 02 01 06 03 19  ..KEYBD_REF.....
        c1 03 03 03 12 18                                ......

//Got event from address monitor
> HCI Event: Vendor (0xff) plen 18                   #152 [hci0] 58.672956
        23 79 54 33 77 88 97 68 02 00 fb c1 29 eb 27 b8  #yT3w..h....).'.
        01 01

Signed-off-by: Alex Lu <[email protected]>
Signed-off-by: Hilda Wu <[email protected]>
Reviewed-by: Simon Horman <[email protected]>
Signed-off-by: Luiz Augusto von Dentz <[email protected]>
Stable-dep-of: 253f339 ("Bluetooth: HCI: Introduce HCI_QUIRK_BROKEN_LE_CODED")
Signed-off-by: Sasha Levin <[email protected]>
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