lkml.org 
[lkml]   [2007]   [Jun]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: USB card reader and HAL
    Hi Kay :)

* Kay Sievers <kay.sievers@vrfy.org> dixit:
> On 6/28/07, DervishD <lkml@dervishd.net> wrote:
> > When I insert a card in the reader, it is not detected, no udev
> >event is generated and I have to do things like "hdparm -z /dev/sda" to
> >"probe" the card. Moreover, I have to do the same when removing the card
> >or the /dev/sdaX nodes are not deleted.
> >
> > Is HAL the only way of making it work? Is there any CONFIG_ thing
> >I've forgotten in my kernel?
>
> You have to open() the device node to trigger events from the kernel,
> the kernel itself will not do that for you. HAL polls the device every
> few seconds.

So, opening the node and checking for ENOMEDIUM is the only
solution... Polling looks like a waste of time, and given that I use the
reader once a month or so, HAL will be a waste of resources. I'll resort
to manually do "hdparm -z" (or something similar) when I need to insert
or remove a card.

Thanks for confirming, Kay :))

Raúl Núñez de Arenas Coronado

--
Linux Registered User 88736 | http://www.dervishd.net
It's my PC and I'll cry if I want to... RAmen!
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-06-29 09:23    [W:0.044 / U:0.816 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site