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[PATCH] libata: rework legacy handling to remove much of the cruft

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Kill host_set->next
Fix simplex support
Allow per platform setting of IDE legacy bases

Some of this can be tidied further later on, in particular all the
legacy port gunge belongs as a PCI quirk/PCI header decode to understand
the special legacy IDE rules in the PCI spec.

Longer term Jeff also wants to move the request_irq/free_irq out of core
which will make this even cleaner.

tj: folded in three followup patches - ata_piix-fix, broken-arch-fix
and fix-new-legacy-handling, and separated per-dev xfermask into
separate patch preceding this one.  Folded in fixes are...

* ata_piix-fix: fix build failure due to host_set->next removal
* broken-arch-fix: add missing include/asm-*/libata-portmap.h
* fix-new-legacy-handling:
	* In ata_pci_init_legacy_port(), probe_num was incorrectly
          incremented during initialization of the secondary port and
          probe_ent->n_ports was incorrectly fixed to 1.

	* Both legacy ports ended up having the same hard_port_no.

	* When printing port information, both legacy ports printed
	  the first irq.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Tejun Heo <htejun@gmail.com>
This commit is contained in:
Alan Cox
2006-08-10 16:59:10 +09:00
committed by Tejun Heo
parent 37deecb513
commit 2ec7df0457
12 changed files with 122 additions and 96 deletions
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5
include/linux/libata.h
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@@ -36,6 +36,8 @@
#include <linux/workqueue.h>
#include <scsi/scsi_host.h>
#include <asm/libata-portmap.h>
/*
* compile-time options: to be removed as soon as all the drivers are
* converted to the new debugging mechanism
@@ -356,6 +358,7 @@ struct ata_probe_ent {
unsigned int udma_mask;
unsigned int legacy_mode;
unsigned long irq;
unsigned long irq2;
unsigned int irq_flags;
unsigned long host_flags;
unsigned long host_set_flags;
@@ -367,6 +370,7 @@ struct ata_host_set {
spinlock_t lock;
struct device *dev;
unsigned long irq;
unsigned long irq2;
void __iomem *mmio_base;
unsigned int n_ports;
void *private_data;
@@ -374,7 +378,6 @@ struct ata_host_set {
unsigned long flags;
int simplex_claimed; /* Keep seperate in case we
ever need to do this locked */
struct ata_host_set *next; /* for legacy mode */
struct ata_port *ports[0];
};