Messages in this thread | | | Date | Fri, 26 Oct 2007 01:35:17 +0100 | From | Alan Cox <> | Subject | Re: [PATCH 2/3] ide: fix drive_is_ready() for non-PCI hosts and CONFIG_IDEPCI_SHARE_IRQ=y |
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On Fri, 26 Oct 2007 02:30:52 +0200 Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> wrote:
> On Friday 26 October 2007, Alan Cox wrote: > > On Fri, 26 Oct 2007 01:36:37 +0200 > > Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> wrote: > > > > > > > > Need to check if the host is a PCI one before reading IDE_ALTSTATUS_REG. > > > > > > Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> > > > > Umm why ? The altstatus register goes back to ST-506 and the original IBM > > XT hard disk controller card ? > > Thought that there have to be some (non-obvious) reason behing the fact that > IDE_ALTSTATUS_REG reading was covered by #ifdef CONFIG_IDEPCI_SHARE_IRQ.
Only that reading altstatus is done to get the state without clearing the IRQ which a status read would do.
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