x86_64: only reserve the first 1MB of IO space for CalIOC2
Signed-off-by: Muli Ben-Yehuda <muli@il.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/x86_64/kernel/pci-calgary.c b/arch/x86_64/kernel/pci-calgary.c
index 22c2d62..6b76e2f 100644
--- a/arch/x86_64/kernel/pci-calgary.c
+++ b/arch/x86_64/kernel/pci-calgary.c
@@ -806,13 +806,13 @@
iommu_range_reserve(tbl, bad_dma_address, EMERGENCY_PAGES);
/* avoid the BIOS/VGA first 640KB-1MB region */
- /* for CalIOC2 - avoid the entire first 2MB */
+ /* for CalIOC2 - avoid the entire first MB */
if (is_calgary(dev->device)) {
start = (640 * 1024);
npages = ((1024 - 640) * 1024) >> PAGE_SHIFT;
} else { /* calioc2 */
start = 0;
- npages = (2 * 1024 * 1024) >> PAGE_SHIFT;
+ npages = (1 * 1024 * 1024) >> PAGE_SHIFT;
}
iommu_range_reserve(tbl, start, npages);