linux-kernel - [PATCH 3/3] swiotlb: use GFP_DMA32 instead of GFP_DMA in swiotlb_alloc

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1220465065-10533-4-git-send-email-fujita.tomonori@lab.ntt.co.jp>
Date:	Thu,  4 Sep 2008 03:04:25 +0900
From:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
To:	linux-kernel@...r.kernel.org
Cc:	joerg.roedel@....com, mingo@...hat.com, tony.luck@...el.com,
	kamezawa.hiroyu@...fujitsu.com, iommu@...ts.linux-foundation.org,
	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
Subject: [PATCH 3/3] swiotlb: use GFP_DMA32 instead of GFP_DMA in swiotlb_alloc_coherent

x86 sets up gfp flag propely so swiotlb_alloc_coherent doesn't need to
use GFP_DMA unconditionally. It leads to allocation failures in some
systems.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
---
 lib/swiotlb.c |    7 +------
 1 files changed, 1 insertions(+), 6 deletions(-)

diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index 977edbd..b88d7c2 100644
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -467,12 +467,7 @@ swiotlb_alloc_coherent(struct device *hwdev, size_t size,
 	void *ret;
 	int order = get_order(size);
 
-	/*
-	 * XXX fix me: the DMA API should pass us an explicit DMA mask
-	 * instead, or use ZONE_DMA32 (ia64 overloads ZONE_DMA to be a ~32
-	 * bit range instead of a 16MB one).
-	 */
-	flags |= GFP_DMA;
+	flags |= GFP_DMA32;
 
 	ret = (void *)__get_free_pages(flags, order);
 	if (ret && address_needs_mapping(hwdev, virt_to_bus(ret))) {
-- 
1.5.5.GIT

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/