linux-kernel - [PATCH 9/9] iommu/amd: Add allocated domain to global list earlier

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Message-Id: <20190411184741.27540-10-tmurphy@arista.com>
Date:   Thu, 11 Apr 2019 19:47:38 +0100
From:   Tom Murphy <tmurphy@...sta.com>
To:     iommu@...ts.linux-foundation.org
Cc:     dima@...sta.com, jamessewart@...sta.com, murphyt7@....ie,
        Tom Murphy <tmurphy@...sta.com>,
        Joerg Roedel <joro@...tes.org>,
        Will Deacon <will.deacon@....com>,
        Robin Murphy <robin.murphy@....com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Kukjin Kim <kgene@...nel.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Rob Clark <robdclark@...il.com>,
        Andy Gross <andy.gross@...aro.org>,
        David Brown <david.brown@...aro.org>,
        Heiko Stuebner <heiko@...ech.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <marc.zyngier@....com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org,
        linux-mediatek@...ts.infradead.org, linux-arm-msm@...r.kernel.org,
        linux-rockchip@...ts.infradead.org
Subject: [PATCH 9/9] iommu/amd: Add allocated domain to global list earlier

dma_ops_domain_free() expects domain to be in a global list.
Arguably, could be called before protection_domain_init().

Signed-off-by: Dmitry Safonov <dima@...sta.com>
Signed-off-by: Tom Murphy <tmurphy@...sta.com>
---
 drivers/iommu/amd_iommu.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 02b351834a3b..bfb021d656aa 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -1801,8 +1801,12 @@ static struct protection_domain *dma_ops_domain_alloc(void)
 	if (!domain)
 		return NULL;
 
-	if (protection_domain_init(domain))
-		goto free_domain;
+	if (protection_domain_init(domain)) {
+		kfree(domain);
+		return NULL;
+	}
+
+	add_domain_to_list(domain);
 
 	domain->mode = PAGE_MODE_3_LEVEL;
 	domain->pt_root = (void *)get_zeroed_page(GFP_KERNEL);
@@ -1824,8 +1828,6 @@ static struct protection_domain *dma_ops_domain_alloc(void)
 	/* Initialize reserved ranges */
 	iommu_dma_copy_reserved_iova(&reserved_iova_ranges, &domain->domain);
 
-	add_domain_to_list(domain);
-
 	return domain;
 
 free_cookie:
-- 
2.17.1