From: Muli Ben-Yehuda <muli@il.ibm.com>
Date: Sat, 21 Jul 2007 15:11:01 +0000 (+0200)
Subject: x86_64: only reserve the first 1MB of IO space for CalIOC2
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=e8f204147149e48d72e9c1e321ee72452169e34a;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git

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 22c2d6250bf..6b76e2fc924 100644
--- a/arch/x86_64/kernel/pci-calgary.c
+++ b/arch/x86_64/kernel/pci-calgary.c
@@ -806,13 +806,13 @@ static void __init calgary_reserve_regions(struct pci_dev *dev)
 	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);