linux-kernel - [PATCH 5.5 005/150] iommu/vt-d: Remove deferred_attach

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Date:   Thu, 27 Feb 2020 14:35:42 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Jerry Snitselaar <jsnitsel@...hat.com>,
        Lu Baolu <baolu.lu@...ux.intel.com>,
        Joerg Roedel <jroedel@...e.de>
Subject: [PATCH 5.5 005/150] iommu/vt-d: Remove deferred_attach_domain()

From: Joerg Roedel <jroedel@...e.de>

commit 96d170f3b1a607612caf3618c534d5c64fc2d61b upstream.

The function is now only a wrapper around find_domain(). Remove the
function and call find_domain() directly at the call-sites.

Fixes: 1ee0186b9a12 ("iommu/vt-d: Refactor find_domain() helper")
Cc: stable@...r.kernel.org # v5.5
Reviewed-by: Jerry Snitselaar <jsnitsel@...hat.com>
Acked-by: Lu Baolu <baolu.lu@...ux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@...e.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/iommu/intel-iommu.c |   11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -2450,11 +2450,6 @@ static void do_deferred_attach(struct de
 		intel_iommu_attach_device(domain, dev);
 }
 
-static struct dmar_domain *deferred_attach_domain(struct device *dev)
-{
-	return find_domain(dev);
-}
-
 static inline struct device_domain_info *
 dmar_search_domain_by_dev_info(int segment, int bus, int devfn)
 {
@@ -3526,7 +3521,7 @@ static dma_addr_t __intel_map_single(str
 
 	BUG_ON(dir == DMA_NONE);
 
-	domain = deferred_attach_domain(dev);
+	domain = find_domain(dev);
 	if (!domain)
 		return DMA_MAPPING_ERROR;
 
@@ -3746,7 +3741,7 @@ static int intel_map_sg(struct device *d
 	if (!iommu_need_mapping(dev))
 		return dma_direct_map_sg(dev, sglist, nelems, dir, attrs);
 
-	domain = deferred_attach_domain(dev);
+	domain = find_domain(dev);
 	if (!domain)
 		return 0;
 
@@ -3844,7 +3839,7 @@ bounce_map_single(struct device *dev, ph
 	if (unlikely(attach_deferred(dev)))
 		do_deferred_attach(dev);
 
-	domain = deferred_attach_domain(dev);
+	domain = find_domain(dev);
 
 	if (WARN_ON(dir == DMA_NONE || !domain))
 		return DMA_MAPPING_ERROR;