Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 5.4 070/110] iommu/dma: fix variable cookie set but not used | Date | Thu, 30 Jan 2020 19:38:46 +0100 |
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From: Qian Cai <cai@lca.pw>
[ Upstream commit 55817b340a31951d23d1692db45522560b1d20f9 ]
The commit c18647900ec8 ("iommu/dma: Relax locking in iommu_dma_prepare_msi()") introduced a compliation warning,
drivers/iommu/dma-iommu.c: In function 'iommu_dma_prepare_msi': drivers/iommu/dma-iommu.c:1206:27: warning: variable 'cookie' set but not used [-Wunused-but-set-variable] struct iommu_dma_cookie *cookie; ^~~~~~
Fixes: c18647900ec8 ("iommu/dma: Relax locking in iommu_dma_prepare_msi()") Signed-off-by: Qian Cai <cai@lca.pw> Acked-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Joerg Roedel <jroedel@suse.de> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/iommu/dma-iommu.c | 3 --- 1 file changed, 3 deletions(-)
diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c index 51456e7f264f9..c68a1f072c314 100644 --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -1177,7 +1177,6 @@ int iommu_dma_prepare_msi(struct msi_desc *desc, phys_addr_t msi_addr) { struct device *dev = msi_desc_to_dev(desc); struct iommu_domain *domain = iommu_get_domain_for_dev(dev); - struct iommu_dma_cookie *cookie; struct iommu_dma_msi_page *msi_page; static DEFINE_MUTEX(msi_prepare_lock); /* see below */ @@ -1186,8 +1185,6 @@ int iommu_dma_prepare_msi(struct msi_desc *desc, phys_addr_t msi_addr) return 0; } - cookie = domain->iova_cookie; - /* * In fact the whole prepare operation should already be serialised by * irq_domain_mutex further up the callchain, but that's pretty subtle -- 2.20.1
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