Linux-kernel mailing list archive 2000-32,: Re: [PATCH] aironet4500_cs.c kmalloc checking

# Re: [PATCH] aironet4500_cs.c kmalloc checking

David Hinds (dhinds@valinux.com)
Wed, 9 Aug 2000 11:57:53 -0700

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> Could anyone point me some reading material, which would tell:
> 1. why most of pcmcia drivers have the same(huge) amount of about
> same code at initialization/cleanup ?

Most of the pcmcia drivers have similarly structured initialization
and cleanup code, but if you look closer, you'll see that it is not
the same.

> 2. What all of those structures/functions mean and under what circumstances
> may be called and so on ?

You did write this driver, right?

The Linux PCMCIA web site (pcmcia-cs.sourceforge.net), and every
distribution of the pcmcia-cs package, includes the Linux PCMCIA
Programmer's Guide, which is 72 pages of API documentation, including
a walk-through of all the components of a PCMCIA client driver. The
PCMCIA package also includes a heavily commented skeleton driver
(dummy_cs).

> could I get pcmcia network card initalized with same amount of codelines
> as ISA and PCI ?

No, you can't.

But then regular ISA and PCI drivers don't support hot plug devices
that are configured dynamically. There is a hot plug PCI interface in
2.4, that also works for CardBus cards, but so far only a few drivers
use it. And the problems are still being sifted out of that. For
16-bit PCMCIA cards, configuration is a lot more complicated than for
PCI devices.

> 4. I'd like to play with acpi/APM a bit, any ref implementations
> for pcmcia ?

For PCMCIA drivers, ACPI/APM is handled for you. You just field
CS_EVENT_SUSPEND and CS_EVENT_RESUME events in your PCMCIA event
handler.

> 5. Is there a way to avoid cardmgr, i.e. for boxes which have 4
> cards in and they probably will stay there forever

At the moment, no, you can't do that.

-- Dave Hinds

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- Next message: Derek J Witt: "Re: [Xpert] Console fix"
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- Maybe in reply to: Arnaldo Carvalho de Melo: "[PATCH] aironet4500_cs.c kmalloc checking"
- Next in thread: Elmer Joandi: "Re: [PATCH] aironet4500_cs.c kmalloc checking"