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ide-generic: probing bugfix

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On Tuesday 05 February 2008, Linus Torvalds wrote:
> 
> On Sat, 2 Feb 2008, Bartlomiej Zolnierkiewicz wrote:
> > 
> > * next part of IDE probing code re-organization saga
> >   (that would be me)
> 
> This seems to cause very irritating and bogus messages for me:
> 
>       Probing IDE interface ide0...
>       Probing IDE interface ide1...
>       ide2: I/O resource 0x0-0x7 not free.
>       ide2: ports already in use, skipping probe
>       ide3: I/O resource 0x0-0x7 not free.
>       ide3: ports already in use, skipping probe
>       ide4: I/O resource 0x0-0x7 not free.
>       ide4: ports already in use, skipping probe
>       ide5: I/O resource 0x0-0x7 not free.
>       ide5: ports already in use, skipping probe
>       ide6: I/O resource 0x0-0x7 not free.
>       ide6: ports already in use, skipping probe
>       ide7: I/O resource 0x0-0x7 not free.
>       ide7: ports already in use, skipping probe
>       ide8: I/O resource 0x0-0x7 not free.
>       ide8: ports already in use, skipping probe
>       ide9: I/O resource 0x0-0x7 not free.
>       ide9: ports already in use, skipping probe
> 
> and that's just totally bogus. It shouldn't even request that region, 
> since it's not been allocated!

The commit 139ddfcab50e5eabcc88341c8743a990ac1be6a2 ("ide: move handling of
I/O resources out of ide_probe_port()") changed the ordering of hwif->noprobe
check vs ide_hwif_request_regions() call (so that we now reserve I/O regions
before checking for hwif->noprobe).  However ide-generic host driver depended
on hwif->noprobe to be set for skipping probing of empty ide_hwifs[] slots.

Fix it by passing only indexes of non-empty slots to ide_device_add_all()
from ide_generic_init().

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2008-02-06 02:57:48 +01:00
parent 21511abd0a
commit b2a53bc636
1 changed files with 8 additions and 2 deletions
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10
drivers/ide/ide-generic.c
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@ -20,8 +20,14 @@ static int __init ide_generic_init(void)
if (ide_hwifs[0].io_ports[IDE_DATA_OFFSET])
ide_get_lock(NULL, NULL); /* for atari only */
for (i = 0; i < MAX_HWIFS; i++)
idx[i] = ide_hwifs[i].present ? 0xff : i;
for (i = 0; i < MAX_HWIFS; i++) {
ide_hwif_t *hwif = &ide_hwifs[i];
if (hwif->io_ports[IDE_DATA_OFFSET] && !hwif->present)
idx[i] = i;
else
idx[i] = 0xff;
}
ide_device_add_all(idx, NULL);