linux-kernel - Re: USB and MMC device problems on Kernel 2.6.22

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Date:	Mon, 10 Sep 2007 01:55:57 +0400
From:	Vladimir Shebordaev <vladimir.shebordaev@...il.com>
To:	development.jim@...il.com
CC:	linux-kernel@...r.kernel.org
Subject: Re: USB and MMC device problems on Kernel 2.6.22

Hi!

development.jim@...il.com пишет:
> Sorry for not clear about the kernel version, let me try again:
> 
> I have an ARM hardware board works fine with USB and MMC on kernel 
> 2.6.11. Now, I've just upgraded it to kernel 2.6.22. The modules seem 
> loaded fine, please see following list, but neither USB nor MMC could 
> detect devices when a USB stick or SD card was plugged in (I enabled 
> module debug, but nothing printed out, no device node created in /dev). 
> It seems some processes were not running, but I can see usbd and mmcd 
> were running at following list, or what is missing?
> 
> 
> K22 $ ps
>   PID  Uid     VmSize Stat Command
>     1 root        268 S   init
>     2 root            SW< [kthreadd]
>     3 root            SWN [ksoftirqd/0]
>     4 root            SW< [events/0]
>     5 root            SW< [khelper]
>    31 root            SW< [kblockd/0]
>    32 root            SW< [ksuspend_usbd]
>    35 root            SW< [khubd]
>    37 root            SW< [kseriod]
>    49 root            SW  [pdflush]
>    50 root            SW  [pdflush]
>    51 root            SW< [kswapd0]
>    52 root            SW< [aio/0]
>   638 root            SW< [kapmd]
>   670 root            SW< [mtdblockd]
>   693 root            SW< [s3c2410-spi.1]
>   710 root            SW< [kbd_queue/0]
>   746 root            SW< [kmmcd]
>   775 root        644 S   /bin/inetd -f
>   776 root        404 S   /bin/sh
>   790 root        324 R   ps
> 

But does anything show up in syslog?

> I understand that the devfs is no longer supported by the kernel 2.6.22, 
> but should the modules still be able to detect the devices? I manually 
> created nodes on /dev tree such as /dev/mmc /dev/scsi before building 
> and downloading to the target. Any clues please?

Please also make sure you've got decent udev running and properly 
configured.

> 
> K22 $ lsmod
> Module                  Size  Used by
> nls_utf8                1696  0
> nls_iso8859_1           3936  0
> nls_cp437               5600  0
> nls_ascii               3936  0
> vfat                   10336  0
> fat                    48028  1 vfat
> mmc_block               8580  0
> s3c2410mci              6560  0
> mmc_core               25876  2 mmc_block,s3c2410mci
> 
> 
> Thank you.
> 
> Jim

In the hope it helps.

Regards,
Vladimir

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