summaryrefslogtreecommitdiff
path: root/arch/sparc
diff options
context:
space:
mode:
authorSowmini Varadhan <sowmini.varadhan@oracle.com>2016-04-11 17:57:05 -0700
committerDavid S. Miller <davem@davemloft.net>2016-04-21 16:43:45 -0400
commit9a78d4fc28904785ffe4c2d361e25b251b479704 (patch)
tree9f213cfb1f2778762d4a55669db75f30e2555617 /arch/sparc
parenta95f94bc98754bad32cb7f36c867d71f3f2be729 (diff)
downloadlinux-9a78d4fc28904785ffe4c2d361e25b251b479704.tar.gz
sparc/pci: Refactor dev_archdata initialization into pci_init_dev_archdata
The function pcibios_add_device() added by commit d0c31e020057 ("sparc/PCI: Fix for panic while enabling SR-IOV") initializes the dev_archdata by doing a memcpy from the PF. This has the problem that it erroneously copies the OF device without explicitly refcounting it. As David Miller pointed out: "Generally speaking we don't really support hot-plug for OF probed devices, but if we did all of the device tree pointers have to be refcounted properly." To fix this error, and also avoid code duplication, this patch creates a new helper function, pci_init_dev_archdata(), that initializes the fields in dev_archdata, and can be invoked by callers after they have taken the needed refcounts Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com> Tested-by: Babu Moger <babu.moger@oracle.com> Reviewed-by: Khalid Aziz <khalid.aziz@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc')
-rw-r--r--arch/sparc/kernel/pci.c29
1 files changed, 21 insertions, 8 deletions
diff --git a/arch/sparc/kernel/pci.c b/arch/sparc/kernel/pci.c
index 9f9614df9e1e..c2b202d763a1 100644
--- a/arch/sparc/kernel/pci.c
+++ b/arch/sparc/kernel/pci.c
@@ -245,6 +245,18 @@ static void pci_parse_of_addrs(struct platform_device *op,
}
}
+static void pci_init_dev_archdata(struct dev_archdata *sd, void *iommu,
+ void *stc, void *host_controller,
+ struct platform_device *op,
+ int numa_node)
+{
+ sd->iommu = iommu;
+ sd->stc = stc;
+ sd->host_controller = host_controller;
+ sd->op = op;
+ sd->numa_node = numa_node;
+}
+
static struct pci_dev *of_create_pci_dev(struct pci_pbm_info *pbm,
struct device_node *node,
struct pci_bus *bus, int devfn)
@@ -259,13 +271,10 @@ static struct pci_dev *of_create_pci_dev(struct pci_pbm_info *pbm,
if (!dev)
return NULL;
+ op = of_find_device_by_node(node);
sd = &dev->dev.archdata;
- sd->iommu = pbm->iommu;
- sd->stc = &pbm->stc;
- sd->host_controller = pbm;
- sd->op = op = of_find_device_by_node(node);
- sd->numa_node = pbm->numa_node;
-
+ pci_init_dev_archdata(sd, pbm->iommu, &pbm->stc, pbm, op,
+ pbm->numa_node);
sd = &op->dev.archdata;
sd->iommu = pbm->iommu;
sd->stc = &pbm->stc;
@@ -1003,9 +1012,13 @@ int pcibios_add_device(struct pci_dev *dev)
* Copy dev_archdata from PF to VF
*/
if (dev->is_virtfn) {
+ struct dev_archdata *psd;
+
pdev = dev->physfn;
- memcpy(&dev->dev.archdata, &pdev->dev.archdata,
- sizeof(struct dev_archdata));
+ psd = &pdev->dev.archdata;
+ pci_init_dev_archdata(&dev->dev.archdata, psd->iommu,
+ psd->stc, psd->host_controller, NULL,
+ psd->numa_node);
}
return 0;
}