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From: m.szyprowski@samsung.com (Marek Szyprowski)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] ARM64: dma-mapping: fix handling of devices registered before arch_initcall
Date: Tue, 16 Feb 2016 15:14:44 +0100	[thread overview]
Message-ID: <1455632084-14666-1-git-send-email-m.szyprowski@samsung.com> (raw)

This patch ensures that devices, which got registered before arch_initcall
will be handled correctly by IOMMU-based DMA-mapping code.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
---
 arch/arm64/mm/dma-mapping.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c
index 573b1e6..ce6019f 100644
--- a/arch/arm64/mm/dma-mapping.c
+++ b/arch/arm64/mm/dma-mapping.c
@@ -928,6 +928,10 @@ static int __init __iommu_dma_init(void)
 		ret = register_iommu_dma_ops_notifier(&platform_bus_type);
 	if (!ret)
 		ret = register_iommu_dma_ops_notifier(&amba_bustype);
+
+	/* handle devices queued before this arch_initcall */
+	if (!ret)
+		__iommu_attach_notifier(NULL, BUS_NOTIFY_ADD_DEVICE, NULL);
 	return ret;
 }
 arch_initcall(__iommu_dma_init);
-- 
1.9.2

             reply	other threads:[~2016-02-16 14:14 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-02-16 14:14 Marek Szyprowski [this message]
2016-02-16 19:05 ` [PATCH] ARM64: dma-mapping: fix handling of devices registered before arch_initcall Robin Murphy
2016-02-17  7:06   ` Marek Szyprowski
2016-02-17 10:19     ` Robin Murphy

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