2.6.0-test11 -- Failed to open /dev/ttyS0: No such device

2.6.0-test11 -- Failed to open /dev/ttyS0: No such device

[William Park]

Does anyone have modem working in 2.6.0-test11?

I have external modem connected to /dev/ttyS0 (COM1).  Kernel
2.6.0-test11 give me
    Failed to open /dev/modem: No such device
where /dev/modem is symlink to /dev/ttyS0.  I've looked at
/proc/interrupts and /proc/ioports, and I can't find any mention of
irq=4 or io=3f8 which are the normal settings that I use.

No problem in kernel-2.4.23, though.

-- 
William Park, Open Geometry Consulting, <opengeometry@yahoo.ca>
Linux solution for data management and processing. 

Re: 2.6.0-test11 -- Failed to open /dev/ttyS0: No such device

[bert hubert]

On Sun, Nov 30, 2003 at 02:17:57AM -0500, William Park wrote:
> Does anyone have modem working in 2.6.0-test11?
> 
> I have external modem connected to /dev/ttyS0 (COM1).  Kernel
> 2.6.0-test11 give me

Double check your .config and attach it if in doubt.

Something like grep SERIAL .config might be enlightning.

-- 
http://www.PowerDNS.com      Open source, database driven DNS Software 
http://lartc.org           Linux Advanced Routing & Traffic Control HOWTO

Re: 2.6.0-test11 -- Failed to open /dev/ttyS0: No such device

[Jacek Kawa]

bert hubert wrote:

> > Does anyone have modem working in 2.6.0-test11?
> > I have external modem connected to /dev/ttyS0 (COM1).  Kernel
> > 2.6.0-test11 give me
> Double check your .config and attach it if in doubt.
> Something like grep SERIAL .config might be enlightning.

It reminds me, that I had to add serial to the list of modules
loading at start to get back access to /dev/ttyS* 
(while upgrading from -test9 to -test10). 

install serial /sbin/modprobe 8250 && { /etc/init.d/setserial modload  }

Linux finwe 2.6.0-test11 #5 Fri Nov 28 01:22:33 CET 2003 i686 GNU/Linux
 
Gnu C                  3.3.2
Gnu make               3.80
util-linux             2.12
mount                  2.12
module-init-tools      0.9.15-pre3
e2fsprogs              1.35-WIP
jfsutils               1.1.4
xfsprogs               2.6.0
PPP                    2.4.2b3
Linux C Library        2.3.2
Dynamic linker (ldd)   2.3.2
Procps                 3.1.14
Net-tools              1.60
Console-tools          0.2.3
Sh-utils               5.0.91
Modules Loaded         isofs nls_cp852 smbfs ppp_deflate zlib_deflate zlib_inflate bsd_comp parport_pc lp parport snd_seq_midi snd_seq_oss snd_seq_midi_event snd_seq snd_pcm_oss snd_mixer_oss snd_ens1371 snd_rawmidi snd_seq_device snd_pcm snd_page_alloc snd_timer snd_ac97_codec gameport snd soundcore ppp_async ppp_generic slhc ip_nat_ftp ipt_multiport ipt_state ipt_pkttype ipt_LOG ipt_limit ipt_REJECT iptable_nat iptable_filter ip_tables ip_conntrack_ftp ip_conntrack rtc 8139too mii crc32 uhci_hcd ohci_hcd nls_iso8859_2 nls_cp437 vfat fat 8250 serial_core psmouse thermal processor fan

bye,

-- 
Jacek Kawa  **I stepped into an avalanche,it covered up my soul [L.Cohen]**

Re: 2.6.0-test11 -- Failed to open /dev/ttyS0: No such device

[Steve Youngs]

[-- Attachment #1: Type: text/plain, Size: 1246 bytes --]

|--==> "JK" == Jacek Kawa <jfk@zeus.polsl.gliwice.pl> writes:

  JK> bert hubert wrote:
  >>> Does anyone have modem working in 2.6.0-test11?
  >>> I have external modem connected to /dev/ttyS0 (COM1).  Kernel
  >>> 2.6.0-test11 give me

  JK> It reminds me, that I had to add serial to the list of modules
  JK> loading at start to get back access to /dev/ttyS* 
  JK> (while upgrading from -test9 to -test10). 

Jacek,

I _think_ this patch will bring back auto-loading of the serial module
for you.  Please let me know how it goes.  (Bert, this won't fix your
problem if you have the serial driver compiled directly into the
kernel, but it might if you have it as a module.)

--- linux-2.6.0-test11/drivers/serial/serial_core.c	2003-11-27 12:12:22.000000000 +1000
+++ linux-2.6.0-test11-sy/drivers/serial/serial_core.c	2003-12-01 01:38:40.000000000 +1000
@@ -2420,3 +2420,4 @@
 
 MODULE_DESCRIPTION("Serial driver core");
 MODULE_LICENSE("GPL");
+MODULE_ALIAS_CHARDEV(drv->major, drv->minor);


-- 
|---<Steve Youngs>---------------<GnuPG KeyID: A94B3003>---|
|              Ashes to ashes, dust to dust.               |
|      The proof of the pudding, is under the crust.       |
|------------------------------<sryoungs@bigpond.net.au>---|

[-- Attachment #2: Type: application/pgp-signature, Size: 256 bytes --]

Re: 2.6.0-test11 -- Failed to open /dev/ttyS0: No such device

[Russell King]

On Mon, Dec 01, 2003 at 01:54:51AM +1000, Steve Youngs wrote:
> |--==> "JK" == Jacek Kawa <jfk@zeus.polsl.gliwice.pl> writes:
> 
>   JK> bert hubert wrote:
>   >>> Does anyone have modem working in 2.6.0-test11?
>   >>> I have external modem connected to /dev/ttyS0 (COM1).  Kernel
>   >>> 2.6.0-test11 give me
> 
>   JK> It reminds me, that I had to add serial to the list of modules
>   JK> loading at start to get back access to /dev/ttyS* 
>   JK> (while upgrading from -test9 to -test10). 
> 
> Jacek,
> 
> I _think_ this patch will bring back auto-loading of the serial module
> for you.  Please let me know how it goes.  (Bert, this won't fix your
> problem if you have the serial driver compiled directly into the
> kernel, but it might if you have it as a module.)
> 
> --- linux-2.6.0-test11/drivers/serial/serial_core.c	2003-11-27 12:12:22.000000000 +1000
> +++ linux-2.6.0-test11-sy/drivers/serial/serial_core.c	2003-12-01 01:38:40.000000000 +1000
> @@ -2420,3 +2420,4 @@
>  
>  MODULE_DESCRIPTION("Serial driver core");
>  MODULE_LICENSE("GPL");
> +MODULE_ALIAS_CHARDEV(drv->major, drv->minor);
> 

This is wrong.  serial_core should /never/ depend on a major/minor number
because it doesn't know what (group of) major/minor(s) it is going to be.

The only modules which know are the hardware drivers themselves, like
8250.c.

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:  2.6 PCMCIA      - http://pcmcia.arm.linux.org.uk/
                 2.6 Serial core

Re: 2.6.0-test11 -- Failed to open /dev/ttyS0: No such device

[William Park]

On Sun, Nov 30, 2003 at 11:23:51AM +0100, bert hubert wrote:
> On Sun, Nov 30, 2003 at 02:17:57AM -0500, William Park wrote:
> > Does anyone have modem working in 2.6.0-test11?
> > 
> > I have external modem connected to /dev/ttyS0 (COM1).  Kernel
> > 2.6.0-test11 give me
> 
> Double check your .config and attach it if in doubt.
> 
> Something like grep SERIAL .config might be enlightning.

My apology...

    CONFIG_PARPORT_SERIAL=m
    # CONFIG_MOUSE_SERIAL is not set
    # CONFIG_SERIAL_NONSTANDARD is not set
    CONFIG_SERIAL_8250=m
    CONFIG_SERIAL_8250_CS=m
    CONFIG_SERIAL_8250_NR_UARTS=4
    # CONFIG_SERIAL_8250_EXTENDED is not set
    CONFIG_SERIAL_CORE=m
    CONFIG_SND_SERIAL_U16550=m
    # CONFIG_USB_SERIAL is not set

    CONFIG_PPP=m
    # CONFIG_PPP_MULTILINK is not set
    # CONFIG_PPP_FILTER is not set
    CONFIG_PPP_ASYNC=m
    CONFIG_PPP_SYNC_TTY=m
    CONFIG_PPP_DEFLATE=m
    CONFIG_PPP_BSDCOMP=m
    CONFIG_PPPOE=m

Everything related to serial and ppp are module.  This is the way I have
it with 2.4.23.  I haven't tried any earlier version than 2.6.0-test11.

-- 
William Park, Open Geometry Consulting, <opengeometry@yahoo.ca>
Linux solution for data management and processing. 

Re: 2.6.0-test11 -- Failed to open /dev/ttyS0: No such device

[William Park]

On Sun, Nov 30, 2003 at 12:36:56PM +0100, Jacek Kawa wrote:
> It reminds me, that I had to add serial to the list of modules
> loading at start to get back access to /dev/ttyS* 
> (while upgrading from -test9 to -test10). 
> 
> install serial /sbin/modprobe 8250 && { /etc/init.d/setserial modload  }

Yes, that did it.  'modprobe 8250' loads '8250' and 'serial_core'
modules.  It's odd that I have to be explicit about it in 2.6.0, whereas
2.4.23 loads 'serial' module automatically when dialing out.

-- 
William Park, Open Geometry Consulting, <opengeometry@yahoo.ca>
Linux solution for data management and processing. 

Re: 2.6.0-test11 -- Failed to open /dev/ttyS0: No such device

[Jacek Kawa]

Steve Youngs wrote:

>   JK> bert hubert wrote:
>   >>> Does anyone have modem working in 2.6.0-test11?
>   >>> I have external modem connected to /dev/ttyS0 (COM1).  Kernel
>   >>> 2.6.0-test11 give me

>   JK> It reminds me, that I had to add serial to the list of modules
>   JK> loading at start to get back access to /dev/ttyS* 
>   JK> (while upgrading from -test9 to -test10). 

> I _think_ this patch will bring back auto-loading of the serial module
> for you.  Please let me know how it goes. 

Well: patched, installed new serial_core.ko, then depmod -a, and try to
access ttySwhatever.

I don't see any difference... If I understood correctly, it could not load 
my 'fake' serial module anyway (?)

BTW. only changes,I think could affect serial directly and
     made betwen test9 and test10 are:

diff -Nru a/drivers/serial/serial_core.c b/drivers/serial/serial_core.c
--- a/drivers/serial/serial_core.c	Sun Nov 23 17:33:38 2003
+++ b/drivers/serial/serial_core.c	Sun Nov 23 17:33:38 2003
@@ -1707,6 +1707,9 @@
 		strcat(stat_buf, "\n");
 	
 		ret += sprintf(buf + ret, stat_buf);
+	} else {
+		strcat(buf, "\n");
+		ret++;
 	}
 #undef STATBIT
 #undef INFOBIT

diff -Nru a/include/linux/serial.h b/include/linux/serial.h
--- a/include/linux/serial.h	Sun Nov 23 17:33:38 2003
+++ b/include/linux/serial.h	Sun Nov 23 17:33:38 2003
@@ -49,7 +49,6 @@
 	unsigned short	iomem_reg_shift;
 	unsigned int	port_high;
 	unsigned long	iomap_base;	/* cookie passed into ioremap */
-	int	reserved[1];
 };
 
 /*

I could try to narrow it down to some -bk, but it will take time...

PS. I wonder - could it be, that somewhere in the middle of 
    decision process test9 > test10 (as test1something)

bye

-- 
Jacek Kawa  **Oh, Lord, bless this thy hand grenade that with it thou
              mayest blow thy enemies to tiny bits, in thy mercy.**

Re: 2.6.0-test11 -- Failed to open /dev/ttyS0: No such device

[Steve Youngs]

[-- Attachment #1: Type: text/plain, Size: 1762 bytes --]

|--==> "JK" == Jacek Kawa <jfk@zeus.polsl.gliwice.pl> writes:

  JK> Steve Youngs wrote:
  >>I _think_ this patch will bring back auto-loading of the serial module
  >>for you.  Please let me know how it goes. 

  JK> Well: patched, installed new serial_core.ko, then depmod -a, and
  JK> try to access ttySwhatever.

As Russell said, the patch was wrong, revert it.  Sorry about that, my
bad.  I really shouldn't try to hack the kernel late at night while
I'm hacking other things at the same time.

I'm pretty sure that the problem has its roots in...

diff -Nru a/fs/char_dev.c b/fs/char_dev.c
--- a/fs/char_dev.c	Sun Nov 23 17:33:38 2003
+++ b/fs/char_dev.c	Sun Nov 23 17:33:38 2003
@@ -434,7 +434,7 @@
 
 static struct kobject *base_probe(dev_t dev, int *part, void *data)
 {
-	request_module("char-major-%d", MAJOR(dev));
+	request_module("char-major-%d-%d", MAJOR(dev), MINOR(dev));
 	return NULL;
 }

...from Rusty, which went into 2.6.0-test10.

Does this work any better?

--- linux-2.6.0-test11/drivers/serial/8250.c	2003-11-27 11:03:42.000000000 +1000
+++ linux-2.6.0-test11-sy/drivers/serial/8250.c	2003-12-01 11:40:44.000000000 +1000
@@ -34,6 +34,7 @@
 #include <linux/serial.h>
 #include <linux/serialP.h>
 #include <linux/delay.h>
+#include <linux/device.h>
 
 #include <asm/io.h>
 #include <asm/irq.h>
@@ -2195,3 +2196,4 @@
 MODULE_PARM(force_rsa, "1-" __MODULE_STRING(PORT_RSA_MAX) "i");
 MODULE_PARM_DESC(force_rsa, "Force I/O ports for RSA");
 #endif
+MODULE_ALIAS_CHARDEV_MAJOR(TTY_MAJOR);



-- 
|---<Steve Youngs>---------------<GnuPG KeyID: A94B3003>---|
|              Ashes to ashes, dust to dust.               |
|      The proof of the pudding, is under the crust.       |
|------------------------------<sryoungs@bigpond.net.au>---|

[-- Attachment #2: Type: application/pgp-signature, Size: 256 bytes --]

Re: 2.6.0-test11 -- Failed to open /dev/ttyS0: No such device

[Jacek Kawa]

Steve Youngs wrote:

>   >>I _think_ this patch will bring back auto-loading of the serial module
>   >>for you.  Please let me know how it goes. 
> 
>   JK> Well: patched, installed new serial_core.ko, then depmod -a, and
>   JK> try to access ttySwhatever.
> 
> As Russell said, the patch was wrong, revert it.  Sorry about that, my
> bad. 

Nothing bad happened :)

> I'm pretty sure that the problem has its roots in...

> --- a/fs/char_dev.c	Sun Nov 23 17:33:38 2003
> +++ b/fs/char_dev.c	Sun Nov 23 17:33:38 2003
> @@ -434,7 +434,7 @@
>  
>  static struct kobject *base_probe(dev_t dev, int *part, void *data)
>  {
> -	request_module("char-major-%d", MAJOR(dev));
> +	request_module("char-major-%d-%d", MAJOR(dev), MINOR(dev));
>  	return NULL;
>  }
> ...from Rusty, which went into 2.6.0-test10.

> Does this work any better?

> --- linux-2.6.0-test11/drivers/serial/8250.c	2003-11-27 11:03:42.000000000 +1000
> +++ linux-2.6.0-test11-sy/drivers/serial/8250.c	2003-12-01 11:40:44.000000000 +1000
[...]
> @@ -2195,3 +2196,4 @@
>  MODULE_PARM(force_rsa, "1-" __MODULE_STRING(PORT_RSA_MAX) "i");
>  MODULE_PARM_DESC(force_rsa, "Force I/O ports for RSA");
>  #endif
> +MODULE_ALIAS_CHARDEV_MAJOR(TTY_MAJOR);

1. Yup, with first patch revertet everything works as before
2. With both patch applied I don't have to manually load
   any module (8250 and serial_core are autoloaded), but
   my pseudomodule serial isn't loaded anymore.

Thanks!

bye

-- 
Jacek Kawa  **SPAM - Stowarzyszenie Polskich Artystów Muzyków**