Hello,
I just upgraded the kernel on a system which has 4 USB modems
(US Robotics 56K Voice/Fax modems). The modems were recognized and
worked under 2.4.6 but under 2.4.10 they are not recognized and I get
and error that no driver claims them. Further testing indicates that
they are recognized under 2.4.9 but broke sometime between then and 2.4.10.
Here are the syslog USB messages from 2.4.9 (working):
] Oct 2 18:31:06 wittsend kernel: usb-ohci.c: USB OHCI at membase 0xc4846000, IRQ 9
] Oct 2 18:31:06 wittsend kernel: usb-ohci.c: usb-00:02.0, Acer Laboratories Inc. [ALi] M5237 USB
] Oct 2 18:31:06 wittsend kernel: usb.c: new USB bus registered, assigned bus number 1
] Oct 2 18:31:06 wittsend kernel: hub.c: USB hub found
] Oct 2 18:31:06 wittsend kernel: hub.c: 2 ports detected
] Oct 2 18:31:06 wittsend kernel: usb.c: registered new driver acm
] Oct 2 18:31:06 wittsend kernel: acm.c: v0.18:USB Abstract Control Model driver for USB modems and ISDN adapters
] Oct 2 18:31:06 wittsend kernel: hub.c: USB new device connect on bus1/2, assigned device number 2
] Oct 2 18:31:06 wittsend kernel: hub.c: USB hub found
] Oct 2 18:31:06 wittsend kernel: hub.c: 4 ports detected
] Oct 2 18:31:06 wittsend kernel: hub.c: USB new device connect on bus1/2/1, assigned device number 3
] Oct 2 18:31:06 wittsend kernel: ttyACM0: USB ACM device
] Oct 2 18:31:06 wittsend kernel: hub.c: USB new device connect on bus1/2/2, assigned device number 4
] Oct 2 18:31:06 wittsend kernel: ttyACM1: USB ACM device
] Oct 2 18:31:14 wittsend automount[10461]: starting automounter version 3.1.3, path = /mnt/longhall, maptype = file, mapname = /etc/auto.longhall
] Oct 2 18:31:15 wittsend automount[10461]: using kernel protocol version 3
] Oct 2 18:31:06 wittsend kernel: hub.c: USB new device connect on bus1/2/3, assigned device number 5
] Oct 2 18:31:06 wittsend kernel: ttyACM2: USB ACM device
] Oct 2 18:31:06 wittsend kernel: hub.c: USB new device connect on bus1/2/4, assigned device number 6
] Oct 2 18:31:06 wittsend kernel: ttyACM3: USB ACM device
Here are the syslog USB messages from 2.4.10 (not working):
] Oct 2 17:53:25 wittsend kernel: usb-ohci.c: USB OHCI at membase 0xc4845000, IRQ 9
] Oct 2 17:53:25 wittsend kernel: usb-ohci.c: usb-00:02.0, Acer Laboratories Inc. [ALi] M5237 USB
] Oct 2 17:53:25 wittsend kernel: usb.c: new USB bus registered, assigned bus number 1
] Oct 2 17:53:25 wittsend kernel: hub.c: USB hub found
] Oct 2 17:53:25 wittsend kernel: hub.c: 2 ports detected
] Oct 2 17:53:25 wittsend kernel: usb.c: registered new driver acm
] Oct 2 17:53:25 wittsend kernel: acm.c: v0.20:USB Abstract Control Model driver for USB modems and ISDN adapters
] Oct 2 17:53:25 wittsend kernel: hub.c: USB new device connect on bus1/2, assigned device number 2
] Oct 2 17:53:25 wittsend kernel: hub.c: USB hub found
] Oct 2 17:53:25 wittsend kernel: hub.c: 4 ports detected
] Oct 2 17:53:25 wittsend kernel: hub.c: USB new device connect on bus1/2/1, assigned device number 3
] Oct 2 17:53:25 wittsend kernel: usb.c: USB device 3 (vend/prod 0x4c1/0x3021) is not claimed by any active driver.
] Oct 2 17:53:25 wittsend kernel: hub.c: USB new device connect on bus1/2/2, assigned device number 4
] Oct 2 17:53:25 wittsend kernel: usb.c: USB device 4 (vend/prod 0x4c1/0x3021) is not claimed by any active driver.
] Oct 2 17:53:25 wittsend kernel: hub.c: USB new device connect on bus1/2/3, assigned device number 5
] Oct 2 17:53:25 wittsend kernel: usb.c: USB device 5 (vend/prod 0x4c1/0x3021) is not claimed by any active driver.
] Oct 2 17:53:25 wittsend kernel: hub.c: USB new device connect on bus1/2/4, assigned device number 6
] Oct 2 17:53:25 wittsend kernel: usb.c: USB device 6 (vend/prod 0x4c1/0x3021) is not claimed by any active driver.
More information from 2.4.9:
/proc/bus/usb/drivers:
usbdevfs
hub
acm
/proc/bus/usb/devices:
T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 2
B: Alloc=103/900 us (11%), #Int= 5, #Iso= 0
D: Ver= 1.10 Cls=09(hub ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
P: Vendor=0000 ProdID=0000 Rev= 0.00
S: Product=USB OHCI Root Hub
S: SerialNumber=c4846000
C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr= 0mA
I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 2 Ivl=255ms
T: Bus=01 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#= 2 Spd=12 MxCh= 4
D: Ver= 1.00 Cls=09(hub ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
P: Vendor=0451 ProdID=1446 Rev= 1.00
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=100mA
I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 1 Ivl=255ms
T: Bus=01 Lev=02 Prnt=02 Port=00 Cnt=01 Dev#= 3 Spd=12 MxCh= 0
D: Ver= 1.00 Cls=02(comm.) Sub=00 Prot=00 MxPS= 8 #Cfgs= 2
P: Vendor=04c1 ProdID=3021 Rev= 0.82
S: Manufacturer=3Com Inc.
S: Product=U.S.Robotics 56000 Voice USB Modem
S: SerialNumber=00560500000000A410131E0F0000
C: #Ifs= 1 Cfg#= 1 Atr=60 MxPwr= 0mA
I: If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=acm
E: Ad=81(I) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
E: Ad=01(O) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
E: Ad=82(I) Atr=03(Int.) MxPS= 16 Ivl=128ms
C:* #Ifs= 2 Cfg#= 2 Atr=60 MxPwr= 0mA
I: If#= 0 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=02 Prot=01 Driver=acm
E: Ad=82(I) Atr=03(Int.) MxPS= 16 Ivl=128ms
I: If#= 1 Alt= 0 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=acm
E: Ad=81(I) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
E: Ad=01(O) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
T: Bus=01 Lev=02 Prnt=02 Port=01 Cnt=02 Dev#= 4 Spd=12 MxCh= 0
D: Ver= 1.00 Cls=02(comm.) Sub=00 Prot=00 MxPS= 8 #Cfgs= 2
P: Vendor=04c1 ProdID=3021 Rev= 0.82
S: Manufacturer=3Com Inc.
S: Product=U.S.Robotics 56000 Voice USB Modem
S: SerialNumber=00560500000000A410131D090000
C: #Ifs= 1 Cfg#= 1 Atr=60 MxPwr= 0mA
I: If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=acm
E: Ad=81(I) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
E: Ad=01(O) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
E: Ad=82(I) Atr=03(Int.) MxPS= 16 Ivl=128ms
C:* #Ifs= 2 Cfg#= 2 Atr=60 MxPwr= 0mA
I: If#= 0 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=02 Prot=01 Driver=acm
E: Ad=82(I) Atr=03(Int.) MxPS= 16 Ivl=128ms
I: If#= 1 Alt= 0 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=acm
E: Ad=81(I) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
E: Ad=01(O) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
T: Bus=01 Lev=02 Prnt=02 Port=02 Cnt=03 Dev#= 5 Spd=12 MxCh= 0
D: Ver= 1.00 Cls=02(comm.) Sub=00 Prot=00 MxPS= 8 #Cfgs= 2
P: Vendor=04c1 ProdID=3021 Rev= 0.82
S: Manufacturer=3Com Inc.
S: Product=U.S.Robotics 56000 Voice USB Modem
S: SerialNumber=005605000000000E100D1A170000
C: #Ifs= 1 Cfg#= 1 Atr=60 MxPwr= 0mA
I: If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=acm
E: Ad=81(I) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
E: Ad=01(O) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
E: Ad=82(I) Atr=03(Int.) MxPS= 16 Ivl=128ms
C:* #Ifs= 2 Cfg#= 2 Atr=60 MxPwr= 0mA
I: If#= 0 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=02 Prot=01 Driver=acm
E: Ad=82(I) Atr=03(Int.) MxPS= 16 Ivl=128ms
I: If#= 1 Alt= 0 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=acm
E: Ad=81(I) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
E: Ad=01(O) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
T: Bus=01 Lev=02 Prnt=02 Port=03 Cnt=04 Dev#= 6 Spd=12 MxCh= 0
D: Ver= 1.00 Cls=02(comm.) Sub=00 Prot=00 MxPS= 8 #Cfgs= 2
P: Vendor=04c1 ProdID=3021 Rev= 0.82
S: Manufacturer=3Com Inc.
S: Product=U.S.Robotics 56000 Voice USB Modem
S: SerialNumber=005605000000000E100D1A020000
C: #Ifs= 1 Cfg#= 1 Atr=60 MxPwr= 0mA
I: If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=acm
E: Ad=81(I) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
E: Ad=01(O) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
E: Ad=82(I) Atr=03(Int.) MxPS= 16 Ivl=128ms
C:* #Ifs= 2 Cfg#= 2 Atr=60 MxPwr= 0mA
I: If#= 0 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=02 Prot=01 Driver=acm
E: Ad=82(I) Atr=03(Int.) MxPS= 16 Ivl=128ms
I: If#= 1 Alt= 0 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=acm
E: Ad=81(I) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
E: Ad=01(O) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
lsmod:
Module Size Used by
acm 5216 4
usb-ohci 18400 0 (unused)
usbcore 47264 1 [acm usb-ohci]
ipchains 34368 0 (unused)
ip2main 41520 0
More information from 2.4.10:
/proc/bus/usb/drivers:
usbdevfs
hub
acm
/proc/bus/usb/devices:
T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 2
B: Alloc= 11/900 us ( 1%), #Int= 1, #Iso= 0
D: Ver= 1.10 Cls=09(hub ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
P: Vendor=0000 ProdID=0000 Rev= 0.00
S: Product=USB OHCI Root Hub
S: SerialNumber=c4845000
C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr= 0mA
I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 2 Ivl=255ms
T: Bus=01 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#= 2 Spd=12 MxCh= 4
D: Ver= 1.00 Cls=09(hub ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
P: Vendor=0451 ProdID=1446 Rev= 1.00
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=100mA
I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 1 Ivl=255ms
T: Bus=01 Lev=02 Prnt=02 Port=00 Cnt=01 Dev#= 3 Spd=12 MxCh= 0
D: Ver= 1.00 Cls=02(comm.) Sub=00 Prot=00 MxPS= 8 #Cfgs= 2
P: Vendor=04c1 ProdID=3021 Rev= 0.82
S: Manufacturer=3Com Inc.
S: Product=U.S.Robotics 56000 Voice USB Modem
S: SerialNumber=00560500000000A410131E0F0000
C:* #Ifs= 1 Cfg#= 1 Atr=60 MxPwr= 0mA
I: If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
E: Ad=81(I) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
E: Ad=01(O) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
E: Ad=82(I) Atr=03(Int.) MxPS= 16 Ivl=128ms
C: #Ifs= 2 Cfg#= 2 Atr=60 MxPwr= 0mA
I: If#= 0 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=02 Prot=01 Driver=(none)
E: Ad=82(I) Atr=03(Int.) MxPS= 16 Ivl=128ms
I: If#= 1 Alt= 0 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=(none)
E: Ad=81(I) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
E: Ad=01(O) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
T: Bus=01 Lev=02 Prnt=02 Port=01 Cnt=02 Dev#= 4 Spd=12 MxCh= 0
D: Ver= 1.00 Cls=02(comm.) Sub=00 Prot=00 MxPS= 8 #Cfgs= 2
P: Vendor=04c1 ProdID=3021 Rev= 0.82
S: Manufacturer=3Com Inc.
S: Product=U.S.Robotics 56000 Voice USB Modem
S: SerialNumber=00560500000000A410131D090000
C:* #Ifs= 1 Cfg#= 1 Atr=60 MxPwr= 0mA
I: If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
E: Ad=81(I) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
E: Ad=01(O) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
E: Ad=82(I) Atr=03(Int.) MxPS= 16 Ivl=128ms
C: #Ifs= 2 Cfg#= 2 Atr=60 MxPwr= 0mA
I: If#= 0 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=02 Prot=01 Driver=(none)
E: Ad=82(I) Atr=03(Int.) MxPS= 16 Ivl=128ms
I: If#= 1 Alt= 0 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=(none)
E: Ad=81(I) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
E: Ad=01(O) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
T: Bus=01 Lev=02 Prnt=02 Port=02 Cnt=03 Dev#= 5 Spd=12 MxCh= 0
D: Ver= 1.00 Cls=02(comm.) Sub=00 Prot=00 MxPS= 8 #Cfgs= 2
P: Vendor=04c1 ProdID=3021 Rev= 0.82
S: Manufacturer=3Com Inc.
S: Product=U.S.Robotics 56000 Voice USB Modem
S: SerialNumber=005605000000000E100D1A170000
C:* #Ifs= 1 Cfg#= 1 Atr=60 MxPwr= 0mA
I: If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
E: Ad=81(I) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
E: Ad=01(O) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
E: Ad=82(I) Atr=03(Int.) MxPS= 16 Ivl=128ms
C: #Ifs= 2 Cfg#= 2 Atr=60 MxPwr= 0mA
I: If#= 0 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=02 Prot=01 Driver=(none)
E: Ad=82(I) Atr=03(Int.) MxPS= 16 Ivl=128ms
I: If#= 1 Alt= 0 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=(none)
E: Ad=81(I) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
E: Ad=01(O) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
T: Bus=01 Lev=02 Prnt=02 Port=03 Cnt=04 Dev#= 6 Spd=12 MxCh= 0
D: Ver= 1.00 Cls=02(comm.) Sub=00 Prot=00 MxPS= 8 #Cfgs= 2
P: Vendor=04c1 ProdID=3021 Rev= 0.82
S: Manufacturer=3Com Inc.
S: Product=U.S.Robotics 56000 Voice USB Modem
S: SerialNumber=005605000000000E100D1A020000
C:* #Ifs= 1 Cfg#= 1 Atr=60 MxPwr= 0mA
I: If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
E: Ad=81(I) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
E: Ad=01(O) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
E: Ad=82(I) Atr=03(Int.) MxPS= 16 Ivl=128ms
C: #Ifs= 2 Cfg#= 2 Atr=60 MxPwr= 0mA
I: If#= 0 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=02 Prot=01 Driver=(none)
E: Ad=82(I) Atr=03(Int.) MxPS= 16 Ivl=128ms
I: If#= 1 Alt= 0 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=(none)
E: Ad=81(I) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
E: Ad=01(O) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
lsmod:
Module Size Used by
acm 5024 0 (unused)
usb-ohci 17632 0 (unused)
usbcore 46176 1 [acm usb-ohci]
ipchains 29632 0
ip2main 41168 0
Mike
--
Michael H. Warfield | (770) 985-6132 | [email protected]
(The Mad Wizard) | (678) 463-0932 | http://www.wittsend.com/mhw/
NIC whois: MHW9 | An optimist believes we live in the best of all
PGP Key: 0xDF1DD471 | possible worlds. A pessimist is sure of it!
> From: "Michael H. Warfield" <[email protected]>
> To: [email protected], [email protected]
> Cc: [email protected]
> Date: Tue, 2 Oct 2001 18:47:57 -0400
> I just upgraded the kernel on a system which has 4 USB modems
> (US Robotics 56K Voice/Fax modems). The modems were recognized and
> worked under 2.4.6 but under 2.4.10 they are not recognized and I get
> and error that no driver claims them. [...]
> T: Bus=01 Lev=02 Prnt=02 Port=02 Cnt=03 Dev#= 5 Spd=12 MxCh= 0
> D: Ver= 1.00 Cls=02(comm.) Sub=00 Prot=00 MxPS= 8 #Cfgs= 2
> P: Vendor=04c1 ProdID=3021 Rev= 0.82
> S: Manufacturer=3Com Inc.
> S: Product=U.S.Robotics 56000 Voice USB Modem
> S: SerialNumber=005605000000000E100D1A170000
> C:* #Ifs= 1 Cfg#= 1 Atr=60 MxPwr= 0mA
> I: If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
> E: Ad=81(I) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
> E: Ad=01(O) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
> E: Ad=82(I) Atr=03(Int.) MxPS= 16 Ivl=128ms
> C: #Ifs= 2 Cfg#= 2 Atr=60 MxPwr= 0mA
> I: If#= 0 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=02 Prot=01 Driver=(none)
> E: Ad=82(I) Atr=03(Int.) MxPS= 16 Ivl=128ms
> I: If#= 1 Alt= 0 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=(none)
> E: Ad=81(I) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
> E: Ad=01(O) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
Looks like 2/2/1 had to math even with 2.4.10, but perhaps
something is too subtle in the matching code.
This is what Vojtech wrote me about it (I hope he forgives me
for posting a private mail - it is a technical subject):
> Date: Tue, 2 Oct 2001 22:36:08 +0200
> From: Vojtech Pavlik <[email protected]>
> To: Pete Zaitcev <[email protected]>
> Subject: Re: acm in 2.2.10
>
> On Tue, Oct 02, 2001 at 02:13:00PM -0400, Pete Zaitcev wrote:
> > This looks dubious:
> >
> > --- linux-2.4.9/drivers/usb/acm.c Wed Jul 4 20:11:17 2001
> > +++ linux-2.4.10/drivers/usb/acm.c Sun Sep 23 09:49:00 2001
> > @@ -647,7 +648,8 @@
> > */
> >
> > static struct usb_device_id acm_ids[] = {
> > - { USB_DEVICE_INFO(2, 0, 0) },
> > + {match_flags: (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
> > + bInterfaceClass: USB_CLASS_COMM, bInterfaceSubClass: 2},
> > { }
> > };
> >
> > Are you sure there are no 2/0/0 devices out there?
> > Someone complained about some modem on Usenet today.
>
> The change wasn't by me nor blessed by me, and it's wrong. It'll be
> reverted in following kernels. The problem is that 2/0/0 also matches
> the CDC Ethernet class, and thus both drivers get loaded for such
> devices via the hotplug mechanism. This works, but is slightly
> inefficient.
>
> --
> Vojtech Pavlik
> SuSE Labs
I think it is important to clear changes by the maintainer.
That's what he is there for :)
-- Pete
On Tue, Oct 02, 2001 at 07:13:11PM -0400, Pete Zaitcev wrote:
> > From: "Michael H. Warfield" <[email protected]>
> > To: [email protected], [email protected]
> > Cc: [email protected]
> > Date: Tue, 2 Oct 2001 18:47:57 -0400
[...]
> Looks like 2/2/1 had to math even with 2.4.10, but perhaps
> something is too subtle in the matching code.
> This is what Vojtech wrote me about it (I hope he forgives me
> for posting a private mail - it is a technical subject):
> > Date: Tue, 2 Oct 2001 22:36:08 +0200
> > From: Vojtech Pavlik <[email protected]>
> > To: Pete Zaitcev <[email protected]>
> > Subject: Re: acm in 2.2.10
> > On Tue, Oct 02, 2001 at 02:13:00PM -0400, Pete Zaitcev wrote:
> > > This looks dubious:
> > >
> > > --- linux-2.4.9/drivers/usb/acm.c Wed Jul 4 20:11:17 2001
> > > +++ linux-2.4.10/drivers/usb/acm.c Sun Sep 23 09:49:00 2001
> > > @@ -647,7 +648,8 @@
> > > */
> > >
> > > static struct usb_device_id acm_ids[] = {
> > > - { USB_DEVICE_INFO(2, 0, 0) },
> > > + {match_flags: (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
> > > + bInterfaceClass: USB_CLASS_COMM, bInterfaceSubClass: 2},
> > > { }
> > > };
> > >
> > > Are you sure there are no 2/0/0 devices out there?
> > > Someone complained about some modem on Usenet today.
> >
> > The change wasn't by me nor blessed by me, and it's wrong. It'll be
> > reverted in following kernels. The problem is that 2/0/0 also matches
> > the CDC Ethernet class, and thus both drivers get loaded for such
> > devices via the hotplug mechanism. This works, but is slightly
> > inefficient.
I'll confirm this. Backing out that change (which seems to be
the only real change to acm.c) corrected the problem and the modems
are now recognized and operate under 2.4.10.
> > --
> > Vojtech Pavlik
> > SuSE Labs
> I think it is important to clear changes by the maintainer.
> That's what he is there for :)
Tell me about it (I maintain the Computone multiport driver). :-)
> -- Pete
Mike
--
Michael H. Warfield | (770) 985-6132 | [email protected]
(The Mad Wizard) | (678) 463-0932 | http://www.wittsend.com/mhw/
NIC whois: MHW9 | An optimist believes we live in the best of all
PGP Key: 0xDF1DD471 | possible worlds. A pessimist is sure of it!