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| author | Paul Mackerras <paulus@samba.org> | 2007-09-20 02:09:27 +0200 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2007-09-20 02:09:27 +0200 |
| commit | 0ce49a3945474fc942ec37c0c0efece60f592f80 (patch) | |
| tree | f42b821b2d9e2d8775bc22f56d444c2cc7b7b7dd /include/asm-mips/mach-generic/ide.h | |
| parent | [POWERPC] FWNMI is only used on pSeries (diff) | |
| parent | Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus (diff) | |
| download | linux-0ce49a3945474fc942ec37c0c0efece60f592f80.tar.xz linux-0ce49a3945474fc942ec37c0c0efece60f592f80.zip | |
Merge branch 'linux-2.6'
Diffstat (limited to 'include/asm-mips/mach-generic/ide.h')
| -rw-r--r-- | include/asm-mips/mach-generic/ide.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/include/asm-mips/mach-generic/ide.h b/include/asm-mips/mach-generic/ide.h index 2b928577be5d..a77128362a7d 100644 --- a/include/asm-mips/mach-generic/ide.h +++ b/include/asm-mips/mach-generic/ide.h @@ -29,6 +29,35 @@ #define IDE_ARCH_OBSOLETE_DEFAULTS +static __inline__ int ide_probe_legacy(void) +{ +#ifdef CONFIG_PCI + struct pci_dev *dev; + /* + * This can be called on the ide_setup() path, super-early in + * boot. But the down_read() will enable local interrupts, + * which can cause some machines to crash. So here we detect + * and flag that situation and bail out early. + */ + if (no_pci_devices()) + return 0; + dev = pci_get_class(PCI_CLASS_BRIDGE_EISA << 8, NULL); + if (dev) + goto found; + dev = pci_get_class(PCI_CLASS_BRIDGE_ISA << 8, NULL); + if (dev) + goto found; + return 0; +found: + pci_dev_put(dev); + return 1; +#elif defined(CONFIG_EISA) || defined(CONFIG_ISA) + return 1; +#else + return 0; +#endif +} + static __inline__ int ide_default_irq(unsigned long base) { switch (base) { @@ -45,6 +74,8 @@ static __inline__ int ide_default_irq(unsigned long base) static __inline__ unsigned long ide_default_io_base(int index) { + if (!ide_probe_legacy()) + return 0; /* * If PCI is present then it is not safe to poke around * the other legacy IDE ports. Only 0x1f0 and 0x170 are |