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Revert "x86: blacklist DMAR on Intel G31/G33 chipsets" 

This reverts commit e51af66308, which was
wrongly hoovered up and submitted about a month after a better fix had
already been merged.

The better fix is commit cbda1ba898
("PCI/iommu: blacklist DMAR on Intel G31/G33 chipsets"), where we do
this blacklisting based on the DMI identification for the offending
motherboard, since sometimes this chipset (or at least a chipset with
the same PCI ID) apparently _does_ actually have an IOMMU.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
David Woodhouse 2008-11-14 13:47:31 +00:00 committed by Linus Torvalds
parent 748f1a2ed7
commit 52168e60f7
2 changed files with 0 additions and 19 deletions
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1
arch/x86/include/asm/iommu.h
View File

@ -6,7 +6,6 @@ extern void no_iommu_init(void);
extern struct dma_mapping_ops nommu_dma_ops;
extern int force_iommu, no_iommu;
extern int iommu_detected;
extern int dmar_disabled;
extern unsigned long iommu_nr_pages(unsigned long addr, unsigned long len);

18
arch/x86/kernel/early-quirks.c
View File

@ -188,20 +188,6 @@ static void __init ati_bugs_contd(int num, int slot, int func)
}
#endif
#ifdef CONFIG_DMAR
static void __init intel_g33_dmar(int num, int slot, int func)
{
struct acpi_table_header *dmar_tbl;
acpi_status status;
status = acpi_get_table(ACPI_SIG_DMAR, 0, &dmar_tbl);
if (ACPI_SUCCESS(status)) {
printk(KERN_INFO "BIOS BUG: DMAR advertised on Intel G31/G33 chipset -- ignoring\n");
dmar_disabled = 1;
}
}
#endif
#define QFLAG_APPLY_ONCE 0x1
#define QFLAG_APPLIED 0x2
#define QFLAG_DONE (QFLAG_APPLY_ONCE|QFLAG_APPLIED)
@ -225,10 +211,6 @@ static struct chipset early_qrk[] __initdata = {
PCI_CLASS_SERIAL_SMBUS, PCI_ANY_ID, 0, ati_bugs },
{ PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_SBX00_SMBUS,
PCI_CLASS_SERIAL_SMBUS, PCI_ANY_ID, 0, ati_bugs_contd },
#ifdef CONFIG_DMAR
{ PCI_VENDOR_ID_INTEL, 0x29c0,
PCI_CLASS_BRIDGE_HOST, PCI_ANY_ID, 0, intel_g33_dmar },
#endif
{}
};