[PATCH 2/2] iommu/vt-d: suppress compiler warnings

[PATCH 2/2] iommu/vt-d: suppress compiler warnings

[Yijing Wang]

suppress compiler warnings:
drivers/iommu/intel-iommu.c: In function ‘device_to_iommu’:
drivers/iommu/intel-iommu.c:673: warning: ‘segment’ may be used uninitialized in this function
drivers/iommu/intel-iommu.c: In function ‘get_domain_for_dev.clone.3’:
drivers/iommu/intel-iommu.c:2217: warning: ‘bridge_bus’ may be used uninitialized in this function
drivers/iommu/intel-iommu.c:2217: warning: ‘bridge_devfn’ may be used uninitialized in this function

Signed-off-by: Yijing Wang <wangyijing@huawei.com>
---
 drivers/iommu/intel-iommu.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 7b7127a..c5fc0ad 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -670,7 +670,7 @@ static struct intel_iommu *device_to_iommu(struct device *dev, u8 *bus, u8 *devf
 	struct intel_iommu *iommu;
 	struct device *tmp;
 	struct pci_dev *ptmp, *pdev = NULL;
-	u16 segment;
+	u16 segment = 0;
 	int i;
 
 	if (dev_is_pci(dev)) {
@@ -2214,7 +2214,8 @@ static struct dmar_domain *get_domain_for_dev(struct device *dev, int gaw)
 	struct device_domain_info *info;
 	struct pci_dev *dev_tmp = NULL;
 	unsigned long flags;
-	u8 bus, devfn, bridge_bus, bridge_devfn;
+	u8 bus, devfn;
+	u8 bridge_bus = 0, bridge_devfn = 0;
 
 	domain = find_domain(dev);
 	if (domain)
-- 
1.7.1


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Re: [PATCH 2/2] iommu/vt-d: suppress compiler warnings

[Joerg Roedel]

On Mon, May 26, 2014 at 08:14:06PM +0800, Yijing Wang wrote:
> suppress compiler warnings:
> drivers/iommu/intel-iommu.c: In function ‘device_to_iommu’:
> drivers/iommu/intel-iommu.c:673: warning: ‘segment’ may be used uninitialized in this function
> drivers/iommu/intel-iommu.c: In function ‘get_domain_for_dev.clone.3’:
> drivers/iommu/intel-iommu.c:2217: warning: ‘bridge_bus’ may be used uninitialized in this function
> drivers/iommu/intel-iommu.c:2217: warning: ‘bridge_devfn’ may be used uninitialized in this function
> 
> Signed-off-by: Yijing Wang <wangyijing@huawei.com>

Applied both, thanks.


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