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authorGu Zheng <guz.fnst@cn.fujitsu.com>2013-05-25 17:48:30 +0400
committerBjorn Helgaas <bhelgaas@google.com>2013-05-28 02:23:28 +0400
commit3c6e6ae770f338ef3e54c5823c21063204f53537 (patch)
tree7460a7cdf07d4e2a734b9c39706b34ab85b6e05f /include/linux/pci.h
parentfe830ef62ac6d8814e27b7e2f632848694b0e5c7 (diff)
downloadlinux-3c6e6ae770f338ef3e54c5823c21063204f53537.tar.xz
PCI: Introduce pci_alloc_dev(struct pci_bus*) to replace alloc_pci_dev()
Here we introduce a new interface to replace alloc_pci_dev(): struct pci_dev *pci_alloc_dev(struct pci_bus *bus) It takes a "struct pci_bus *" argument, so we can alloc a PCI device on a target PCI bus, and it acquires a reference on the pci_bus. We use pci_alloc_dev(NULL) to simplify the old alloc_pci_dev(), and keep it for a while but mark it as __deprecated. Holding a reference to the pci_bus ensures that referencing pci_dev->bus is valid as long as the pci_dev is valid. [bhelgaas: keep existing "return error early" structure in pci_alloc_dev()] Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com> Signed-off-by: Jiang Liu <jiang.liu@huawei.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'include/linux/pci.h')
-rw-r--r--include/linux/pci.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 7556c590ddfd..b0f4a8264118 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -364,7 +364,8 @@ static inline struct pci_dev *pci_physfn(struct pci_dev *dev)
return dev;
}
-struct pci_dev *alloc_pci_dev(void);
+struct pci_dev *pci_alloc_dev(struct pci_bus *bus);
+struct pci_dev * __deprecated alloc_pci_dev(void);
#define to_pci_dev(n) container_of(n, struct pci_dev, dev)
#define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)