On Thu, 8 Oct 2009 12:22:22 +0100
Ian Abbott <abbotti@xxxxxxxxx> wrote:
> On 08/10/09 10:55, Alan Cox wrote:
> > On Thu, 8 Oct 2009 09:58:30 +0800
> > Thomas Chou <thomas@xxxxxxxxxxxxx> wrote:
> >
> >> This patch adds a new PATA driver to support the Altera SOPC Builder
> >> CompactFlash component as a PATA device with support for insertion
> >> and removal of CF cards. It uses the platform driver model.
> >
> > Can you explain why you remove the interface rather than the device on
> > the interface when you detect a card removal ?
>
> As the originator of the driver, the only answer I have is "I don't know
> how." I was hoping for inspiration from some of the other PATA CF
> drivers, but alas, I couldn't find it. I admit that removing the whole
> ATA host is a bit on the extreme side.
I think the bit you want is something like:
struct ata_eh_info *ehi = &ap->link->eh_info;
if (mumblemumble & whatever) {
ata_ehi_clear_desc(ehi);
ata_ehi_hotplugged(ehi);
ata_ehi_push_desc(ehi, "CF connection changed");
ata_port_freeze(ap);
}
The core code also assumes your freeze method will mask any further
connection change reports until the port is unfrozen (so you don't get
multiple parallel "in/out/in/out" events at once)
Alan
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