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authorLinus Torvalds <torvalds@woody.linux-foundation.org>2007-09-14 14:00:35 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-09-14 14:00:35 -0700
commit7eeac505d912cfe5805290f8f9e293b134e00237 (patch)
tree32b1e61bd01e390d4db24fba5ca941580c6db8ba /include
parent22d95b1282810f5af599ee292b3fc443aefbdad0 (diff)
parent50da469a79fa2152d824f25f5ad5962f4af4343d (diff)
Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: [MIPS] 20Kc: Disable use of WAIT instruction. [MIPS] Workaround for 4Kc machine check exception [MIPS] Malta: Fix off by one bug in interrupt handler. [MIPS] No ide_default_io_base() if PCI IDE was not found [MIPS] Add #include <linux/profile.h> to arch/mips/kernel/time.c [MIPS] N32 needs to use compat_sys_futimesat [MIPS] rtlx: Fix build error. [MIPS] rtlx: fix int vs. long bug.
Diffstat (limited to 'include')
-rw-r--r--include/asm-mips/mach-generic/ide.h31
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 2b928577be5..a77128362a7 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