yenta_socket "nobody cared - Disabling IRQ #4"
jonas.oreland at mysql.com
Fri Mar 18 18:00:10 EST 2005
Daniel Ritz wrote:
Thanks for your effort!
> it's the second time now i see this problem with an atheros chipset in
> combination with a TI bridge. last time it was the 1225...
> attached a patch that could help...
1) It works somewhat better. irq doesn't get disabled.
2) however wlan card get disfunctional. I haven't been able to contact my wap
even if i'm standing on it...
3) unplug has resulted in kernel panic (twice)
(btw: how do I do to capture and report those)
4) when unlug don't produce kernel panic, then there is no way of power-oning that card again.
5) booting with the card inserted makes it not power on when yenta_socket is loaded (module)
comment: the card being disfunction could have something to with the driver.
but before it worked sometimes...
> for TI bridges: turn off interrupts during card power-on. this seems
> to be neccessary for some combination of TI bridges with at least CB cards
> with atheros chipset...problem is that they produce an interrupt storm
> during power-on so the kernel happens to disable the IRQ which is a bad
> thing (tm).
> adds a generic hook function so that a socket driver can hook into
> almost anywhere (by adding more hook points of course). this is the
> cleanest way i can think of. and it allows adding more workarounds
> for more problems...
> for the TI specific interrupt on-off stuff just save the MFUNC register
> and set it to 0 to disable all interrupts, restore it afterwards.
> Signed-off-by: Daniel Ritz <daniel.ritz at gmx.ch>
Some thoughts: (not I'm neither pcmcia nor linux expert).
The "irq storm", shouldn't that be "acked" in someway.
I.e. the card produced a lot of irq's (that get ignored)
isn't the "real" solution to capture them, and "do something clever"?
Instead of just "shutting the card down".
hmmm...wonder if that made sence
Question: Why do you think that it worked sometimes before?
but the hook was/is nice :-)
More information about the linux-pcmcia