[02/18] PCI: endpoint: pci-epf-core: Add an API to get matching "pci_epf_device_id"

Commit Message

Kishon Vijay Abraham I Aug. 18, 2017, 2:57 p.m. UTC

Add an API to get "pci_epf_device_id" matching the epf name. This can be
used by the epf driver to get the driver data corresponding to the epf
device name.

Signed-off-by: Kishon Vijay Abraham I <[e-mail]>
---
 drivers/pci/endpoint/pci-epf-core.c | 16 ++++++++++++++++
 include/linux/pci-epf.h             |  2 ++
 2 files changed, 18 insertions(+)

Patch

diff --git a/drivers/pci/endpoint/pci-epf-core.c b/drivers/pci/endpoint/pci-epf-core.c
index 6877d6a5bcc9..60ea0c51161e 100644
--- a/drivers/pci/endpoint/pci-epf-core.c
+++ b/drivers/pci/endpoint/pci-epf-core.c
@@ -267,6 +267,22 @@  struct pci_epf *pci_epf_create(const char *name)
 }
 EXPORT_SYMBOL_GPL(pci_epf_create);
 
+const struct pci_epf_device_id *
+pci_epf_match_device(const struct pci_epf_device_id *id, struct pci_epf *epf)
+{
+	if (!id || !epf)
+		return NULL;
+
+	while (id) {
+		if (strcmp(epf->name, id->name) == 0)
+			return id;
+		id++;
+	}
+
+	return NULL;
+}
+EXPORT_SYMBOL_GPL(pci_epf_match_device);
+
 static void pci_epf_dev_release(struct device *dev)
 {
 	struct pci_epf *epf = to_pci_epf(dev);
diff --git a/include/linux/pci-epf.h b/include/linux/pci-epf.h
index 0d529cb90143..6ed63b5e106b 100644
--- a/include/linux/pci-epf.h
+++ b/include/linux/pci-epf.h
@@ -149,6 +149,8 @@  static inline void *epf_get_drvdata(struct pci_epf *epf)
 	return dev_get_drvdata(&epf->dev);
 }
 
+const struct pci_epf_device_id *
+pci_epf_match_device(const struct pci_epf_device_id *id, struct pci_epf *epf);
 struct pci_epf *pci_epf_create(const char *name);
 void pci_epf_destroy(struct pci_epf *epf);
 int __pci_epf_register_driver(struct pci_epf_driver *driver,