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libata/IDE: remove combined mode quirk

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Both old-IDE and libata should be able handle all controllers and
devices found using normal resource reservation methods.

This eliminates the awful, low-performing split-driver configuration
where old-IDE drove the PATA portion of a PCI device, in PIO-only mode,
and libata drove the SATA portion of the /same/ PCI device, in DMA mode.
Typically vendors would ship SATA hard drive / PATA optical
configuration, which would lend itself to slow (PIO-only) CD-ROM
performance.

For Intel users running in combined mode, it is now wholly dependent on
your driver choice (potentially link order, if you compile both drivers
in) whether old-IDE or libata will drive your hardware.

In either case, you will get full performance from both SATA and PATA
ports now, without having to pass a kernel command line parameter.

Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Jeff Garzik
2007-03-09 10:54:42 -05:00
parent e424675f15
commit 8cdfb29c0c
8 changed files with 6 additions and 173 deletions
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21
kernel/resource.c
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@@ -212,27 +212,6 @@ int request_resource(struct resource *root, struct resource *new)
EXPORT_SYMBOL(request_resource);
/**
* ____request_resource - reserve a resource, with resource conflict returned
* @root: root resource descriptor
* @new: resource descriptor desired by caller
*
* Returns:
* On success, NULL is returned.
* On error, a pointer to the conflicting resource is returned.
*/
struct resource *____request_resource(struct resource *root, struct resource *new)
{
struct resource *conflict;
write_lock(&resource_lock);
conflict = __request_resource(root, new);
write_unlock(&resource_lock);
return conflict;
}
EXPORT_SYMBOL(____request_resource);
/**
* release_resource - release a previously reserved resource
* @old: resource pointer